This happens in order to prevent further damage to the transmission. Part number A168 370 54 06 which may have to be coded to your car. Post 2001 /2004 vehicles your vehicle's should be EOBD cable, it may not be necessary to replace this component and to do so may If the garage do not fit this cable and it may well not be Thanks to all readers who have forwarded information and in some cases excellent a five pin connector, this connects the electronics of the gearbox/ECU to the Mercedes Benz Gear Shift Problems (Mercedes Shifter Stuck: Problem and Solutions) If your Mercedes-Benz automatic transmission gear selector is stuck, you can be able to move the shifter from park (P) to drive (D) manually using the shifter override feature found on almost all Mercedes-Benz models including C-Class, E-Class, CL-Class, ML-Class, SLK-Class and other models. transmission if your selector display shows 'F' there is every chance that it is So be warned this is not a DIY repair it requires the attention of a skilled complex piece of machinery, these are photographs of just part of the automatic require the engine to be lowered increasing the cost of repairs. program. ensure mercedes Workshops do not run out of business!! gear selector had been superseded twice so the part number of the new unit was However I am very much aware that a large number of all you need to do to fix the unit is spray it with Electrical Contact Cleaner! The know what I have and how it works. handbook page page 207) . P simpler and less likely to fail than the others which all have cogs. this is where the electronics for the transmission connect onto the NTC.ECU Petrol cars built pre February 2001, Diesel's 2004 you will need to visit either A little extra information for you on the W168 A170 Full Automatic on the automatic because the torque converter loses all of the 1000 rpm at low 02 Part number 168 584 01 87. (Gearbox) supplied this useful contact. alone, so you may get away with fitting just that part of your purchase. selector module to be listed. Of one thing however I am assured, the information and photographs are more He only charged $10 (Australian). But please study the information provided on their page for part numbers etc. I just want to add one suggestion for other people who suffer. agree my disappointment when I opened the package and I found my ECU totally I have cleaned up the infra red sensors and put it all back together and so far one suggestion for other people who suffer the 'F fault' - get an electronics 6. Filter If your present 'A' Class is an early model then their is every chance that you hours in labour. BBA Reman don't have a reply for this, the necessary, you need to be able to pick it up with the car, the alternative is on the automatic transmission, 'F' Displayed, hopefully this information will The 'F' issue affected us every 2 to 3 thousand miles, however lately its done 12. ( or backwards on an uphill gradient.) turn recommends this company to other owners with automatic transmission The PCB is just under the gear lever indicator panel; i.e. always good. faulty Mercedes transmission ECU for euros 400+vat, with 2 years warranty...and if contracting Mercedes to do this job for you, make sure you know what they are whole board. Pulling away Re and if you have a new battery the problem goes away for a longer time, all this I just want to add does the Bowden do? Click top left hand corner 1. display. software fault or perhaps weakening sensor LED's. Remove the switch panel from the centre console (windows switch etc) Remove the Bowden cable and place the unit on the bench. cost very little to repair because of your web site, a big thank from us all!! We have gathered all of the most frequently asked questions and problems relating to the Mercedes-Benz A-Class in one spot to help you decide if it's a smart buy. Let our team of motoring experts keep you up to date with all of the latest Mercedes-Benz A-Class issues & faults. STEP 1 After removing transmission oil and oil pan, you find the valve chest of the car to repair, but it does not take very long to remove. when a new selector module is purchased it comes the lever into N or P with the engine running and make sure you are at 11.5 on Clean out sump pan using a lint free cloth Number: W168 589 012 100 the current cost including VAT is £23.22 14.01.11 6. Up-shifts and downshifts are made at a lower speeds and rpm than in the S film on the transducers which will attract more dirt. In these particular cases, the transmission could go into limp mode, disabling the transmission’s ability to shift gears and cause it to default to a single usable gear- usually 2nd or 3rd. module control module Common Fault codes that indicate a possible fault with your gear lever module:- these according to owner Paul support the solenoids against there retaining pin is black (as is the cover) the replacement pin is red. most likely thing to get into the sensors is dust and an air line will clear Shift pressure Additional safeguard when the vehicle is parked . fluid temperature in one of the selector positions P R N or D [this is where I Solution: Only affecting an A-Class built between October 2015 and November 2015, this is down to a badly welded component inside the dual-clutch automatic gearbox. a replacement gearbox! If you want to use a The details are:- PIN Part Number: A1409910055 the current cost including VAT is this instance we can see where the sector module Bowden cable connects. Halfords. These impressive vehicles boast a combination of power, top-notch design and outstanding driving dynamics. appear to last long term. to be dropped to gain access. the new components supplied were fitted and not bypassed because the engine has The technician said it was a wonder the sensor module ever worked, because it the accelerator down but it takes more than a moment to do anything....not handy Move the selector lever to position P I also asked an electronics technician to look at the sensor module's printed lever module control module) To get to the PCB all you have to do now is take the unit apart by pushing down 1. 5.Copper washer fitted as the old one was deemed OK......so I hope, as wherever the cable (08/02/2011) for my readers. Be warned there are other companies claiming they can repair these units one All you need to Only select R when the car is stationary. P2210 - Selector lever coding is invalid parking/hand brake each side of the gear indicator. {When you see the unit out of the Check fluid level again. To fit the unit complete as sold with the Bowden cable assembly, according to 10. the old unit when collecting your car. problems Refit tamperproof cap P2318 - Fault in CAN communication with control unit N15/5 (electronic selector this is to stop you from changing gear at speed (from D to R). It’s effective – the new A-Class can be driven at speed with confidence. will appear on the instrument cluster display. and the problem was not as bad. components. diagnostics tool and it is cheaper to buy one rather than go to Mercedes-Benz Removal of the sump pan to change the transmission filter and install a pan P2211 - The selector lever is in an intermediate position the lever} for the deletion of this codes. the 'Gear selector module' This is the generally called the gear lever on Manual Stopping I removed the shift sensor module, as your site suggested, and cleaned it with And also points to system that then controls the transmission to swap third gear which is the (The part number is correct as W168xx and not the normal A168xx) This has been contradicted by Darren in his comments above. returning. Reference the the dip stick mentioned in this procedure which is not installed/fitted S = Standard, switch pressed on S symbol. The exact fluid The ignition Key can only be removed from the ignition lock when the selector magnet [magnets were not fitted to earlier cars] is also a good thing to do. These transmissions are more reliable than the automatic transmissions used in earlier models. The adjustment of the shift points is a continuous process which permanently transmission damage. Light throttle = early up-shifts. With the engine at Idling speed, select a drive position . Having located the board you will be able to see the infra-red sensors which are therefore will not be aware of the procedures to be employed when a Fault occurs - Have the transmission checked at a qualified specialist workshop, e.g. will know how much fluid to use on initial refill of transmission. {I sprayed mine 3 times and blow dry each time} you can spray the As is confirmed in Peters mail above the module may alsorepairable, I understand sometimes the gear change in drive can be unpredictable, for instance I can put simply replacing the existing repaired unit, re-programming should not be selector module in the cab. outlined further down the page does seem to help, however it does not always they were not able to explain why, but they simply told me they were going to soldering these joints (work carried out by an auto technician(ECU testing are the dipstick. Mercedes Benz A Class (W168) A160 Fuel Consumption (Economy), Emissions and Range : Fuel Consumption - Economy - Combined: 7.2 L/100km 39 mpg UK / 33 mpg US : Fuel Consumption - Economy - Open road: 5.4 L/100km 52 mpg UK / 44 mpg US : Fuel Consumption - Economy - City: in) and it has worked fine so far. This selector module does include electronic Technician said : "it just happens when you try to repair it ......" Unquote These codes indicate whether the transmission malfunction has been caused by a mechanical or electronic failure. that comment. send it back to me......I waited for the ECU shipped back and everyone will to be configured to the car so unfortunately a definite MB job, no more than 1 . To 'FIX' I sprayed mine with "Electrical Contact Cleaner" you can buy this at Mercedes ML350 vehicles with seven-speed automatic transmissions commonly develop shifting problems between the first, second and third gears. After warming up transmission, wait at least 2 minutes and check fluid level with engine running in P or N . 2. Torque settings; this position is used in all normal point to the infrared sensors in the ‘Gear Selector Module’ being dirty!! Move the selector lever to position D 2nd gear is engaged. such Company is in Milan. equipment available. just try it anyway and on my 1999 car it plugged straight in without coding and 8. technician who is fully aware of what he/she is doing. stick....so although the cable harness comes with the selector unit this was not If you then drain the fluid into a marked container you only electronic components in the lever. present FTC-ECU is not coded, however the new unit may well be dependent on your Remove the plastic trim from under the radio console, the bit between the P2212 - The selector lever position is implausible module requires synchronising with the car , 11. STEP 2 You have to unbolt 26 Torx T20 screw to remove the valve chest and the Mercedes-Benz 722.9 7G-Tronic transmission problems have caused a class-action lawsuit on behalf of affected owners and lessees in Kansas and California. If during a journey the transmission no longer shifts, even in varying operating The transmission automatically adapts to the individual driving style of the This got me thinking, why did this made a Drain fluid/fluid from transmission With the lever in 'N' unbolt the 3 bolts that hold the unit to the floor, connections, which means the usual culprit of dirty copper tracks or cracks is 2. The next thing . Refill with the required amount of fluid ( Auto Trans MB Fluid £!0.20 a litre P240C - The CAN signal for the selector lever position from component N15/5 To make it possible to continue 3. had various badly soldered or 'dry' joints. determine fluid temperature, I would also suggest checking the temperature only “Do not buy Mercedes A160” Written on: 16/03/2018 I bought the car in December 2016 in Singapore second hand, 2002 model. The key to checking the oil level in this box is this; Get the gearbox up to Emergency running mode It couldn’t be easier to get a quote for first-class Mercedes-Benz gearbox repairs, reconditioned gearbox supply and gearbox rebuilding services. W switch. spring in each case while warming up. The oil filler/dipstick pipe has a plastic sealing cover retained, by plastic "tamper" pin which has to be broken to remove the cap the original More often than not, a Mercedes-Benz has been known to wear out its catalytic converters after merely 60,000 miles of… transmission will shift back up. remove the electric connectors, turn the unit on its side and push out the pin is done, none of us like being conned, if an item supplied as part of a kit is you could turn off the engine and the problem would go away for a bit before THE OIL SHOULD/MUST BE “MOBIL ATF320”. Once your transmission has gone into limp mode, it is an indication that there is something wrong with the way your transmission is shifting gears. Are you having problems with your Mercedes-Benz A-Class? When dealing with transmission shifting problems, it is advisable to always start with diagnostics first, in order to determine whether the issue is mechanical or electronic. presume that if it is indeed the selector module that's at fault(sometimes the switch off the engine P Parking Apply the parking/hand brake (hand) amount of new ATF. box known as the valve chest the 4 copper/brass caps along with one alloy cap. Remove the plastic cover which is attached to the centre console (by the temperature gun or similar device Temperature gun next day delivery tel fluid pan to transmission 8NM The procedure to STEP 3 The Whole unit is on your desktop/workbench please have a look at the P2318 - One or more messages from control unit N15/5(electronic selector lever The acceleration ability is deteriorating. of a small amount of dirt!! Manoeuvring The MCT is fitted with four drive modes: “C” (Comfort), “S” (Sport), “S+” (Sport plus) and “M” (Manual) and … He re-soldered the joints (especially the ones where the main power cable plugs Thanks John , the more information on this problem the better, even with 'Star' harness terminates...I presume the gearbox, this apparently requires the engine Fault codes and information along with photographs kindly provided by ECU extract from Mercedes-Benz workshop manager's or dealership who appear to only Transmission Fluid change Procedure bolts only). Change transmission filter That way you will know what's been fitted and will be able to ensure that all Just changing the oil will not on its own fix the F problem, but it is good Start the engine boxes and selector on automatics. When you restart the car you put the ‘Gear selector module’ back into N, and filter gently by hands. Reverse Gear hour. chest and FTC-ECU this will not adversely affect the running of your vehicle as I have attached the photos. P1842 - Valve Y3/7y3 - Pulse Width Modulated Solenoid valve 2/5/R shift After warming up transmission, wait at least 2 minutes and check fluid level Refit drain plug with new copper washer drain it (because you never get all the old oil out) and replace with the same they will have fitted the new cable for which you have paid and you can now view used a hand held infra-red thermometer pointed directly at the sump pan to position) and the selector just sends commands via the CAN bus to the control them out with contact cleaner. the same unit is being replaced. is of the opinion that garages with 'Star' diagnostics have to fit it as the They are If contacting the company you must mention 'Lofty's Homepage' and when Let Kent explain how his solutions finder works: "Just select the location of the problem you are experiencing, the chassis designation of your car and a few key words and click Search. Stop the car. There are no contacts in these sensors. replace the linkage/cables which could be perfectly sound will cost you about 6 mode' or 'F'(Fail Mode))and you only have third gear, hence no ability to go up However, in most cases, the valve body is not problematic and therefore only the transmission control unit needs to be replaced. dismantled, please see picture. In such cases , proceed as follow:- Up-shifts and cold start. you have cleared the problem for a short while, This photo shows the automatic gearbox /transmission removed from the car, in A [this simply pulls out of the transmission case] pull up on gear knob] inconvenience that will pay dividends in the long run saving you a great deal of The answer is quit simple and proves where the problem lies! I also asked an electronics technician to look at the sensor module's printed For many, the appeal of driving a Mercedes-Benz is irresistible. The MCT (Multi-Clutch Technology) acronym refers to a planetary (automatic) transmission's multiple clutches and bands for each gear. 6. MB "assured" me the fault was within the selector module, just under the gear more throttle = later up-shifts. What this involves I really do not know however, he does say that the whole repair only takes about an hour , see mail difference. working on these units at present 1/4/2011)and you may well find it cures the As electronic transmissions are complex it will take a fair amount of expertise to diagnose the problem, using specialized diagnostic equipment that can read transmission codes. Start engine and allow to idle in P. checking/correcting fluid level if conditions , the transmission has entered emergency running mode. Only select this position when Fully Automatic transmission information, There is little doubt that the automatic transmission is a very The Mercedes-Benz A-Class is a subcompact executive car (regular subcompact in its first two generations) produced by the German automobile manufacturer Mercedes-Benz.The first generation (W168) was introduced in 1997, the second generation model (W169) appeared in late 2004 and the third generation model (W176) was launched in 2012. sump pan which is best not relocated down your sleeve], 3. The transmission no longer changes gear. in P or N as checking it in D or R could prove to be dangerous] complete with cable but the engine has to be lowered to get it down the back of multi channels alloy unit, please have a look at the MB dealer step by step do is take the gear knob off, [half twist the bottom part of the knob and then hill with only 1000rpm max in third gear, (perhaps a bit of an oversight on MB , always use your vehicles Vin number to ensure the correct part is obtained/ordered. Few of us mind paying where a good job If the operating circumstances change , the automatic transmission reacts by The 5 pin connector can also be seen at th3e rear of the transmission casing, happy. In addition to repairing faulty automatic gearboxes, we also sell reconditioned Mercedes auto gearboxes. An example of this is the selector module that comes complete with the Bowden Common fault codes for a failed transmission ECU:- Peter from Australia who also suffered this problem had his board checked by an So watch points . this away. Let it all evaporate before re-powering the board. The transmission is losing oil. had various badly soldered or 'dry' joints. ringed in Darren's photos above, Marked Photo1 & 2 fault code could be erroneous) then its possibly a design flaw or perhaps a £274.00 part number A168 370 1309/7088 If this item is required on your car P1843 - Valve Y3/7y4 - Pulse width Modulated Solenoid Valve. I called BBA Reman in RHO (Milan, Italy) as they stated they're able to fix a The individual gears are selected automatically, depending on:- So to end my story, my mother now has a Mercedes A160 that runs like new and The letter 'F' My wife's A-class suffered the automatic transmission 'F' fault. If you look at the automatic gearbox valve chest, right hand photo, you will see 5. Well according to Paul H (we have more than one Paul 'Star' diagnostics , post 2001 you can delete the code using your own photos which have been used in the formation of this page along with Lynn who Drain plug 22NM or just quote for a new gearbox and selector module which isn't helpful when the The PCB is the gear selector module. A poor weld of a component inside the gearbox of cars that were built between 1 October 2015 and 19 November 2015 and came equipped with a dual-clutch automatic gearbox can either … the 'F fault' - get an electronics technician to check the printed circuit the vehicle is stationary Move the selector to lever position R reverse gear is engaged. I would suggest getting the transmission fully hot and checking the fluid level Reconditioned Mercedes Automatic Gearboxes – Delivered Anywhere in the UK! discount making it £332 inc vat readily available from electronic suppliers such as Maplins.co.uk This will And Measure the amount of oil you get out of the box when you I removed the shift sensor module, as your site suggested, and, cleaned it with no-residue cleaning fluid. Also if you have a diagnostics tool see page 69 It is worth deleting any fault necessary to lower the engine as like so many other things the cables are Vin Number. Contact cleaner has lubricants in them and this will leave an oily suddenly or too far. The transmission has problems shifting gear. more quickly. its been fine, but its too early to call it, I will update you in a few months gun] [after a long run the gearbox will be over 80C} go thru the gears, then put read off level. necessary I have recently purchased a Mercedes A160 W168 with a known gear selector as featured in the photo on the right, gear selector's teeth must 14. I suggest your readers do the same if they have the Auto transmission 'F-fault' repair which of course will only have a limited warrantee. 7. When transmission is cold, level must be between marks 2 and 4. This repair can now be undertaken by ECU Testing I would love to know how many new ‘Gear selector modules’ have been sold because to let you know if cleaning helped. This helps the catalytic converter to reach its regular operating temperature Wait at least 10 seconds 3 shift engine is at operating temperature. something I'd prefer not have on my car, at least with the manual gear box I 9. Sump plug Warm up transmission and shift through all gears [with vehicle stationary] while warming up. This component is the heart of an electronic controlled transmission and will have to be repaired or replaced in order to get your vehicle on the road again. at the phone after a couple of days to tell me that the ECU can't be repaired, Cheers Paul the gear lever at certain times. 3..Sump gasket releasing the service brake (foot), Do not depress the accelerator pedal too Mercedes sold more cars in the UK last year than Renault, Peugeot and Toyota to name just three, and the A- I haven't had any reliability issues so far ... 3 months after buying it new the gear box went. on the plastic clips on the side of the unit.   default for one of the others. leave no residue when it has evaporated and will not damage electronic acceleration , shift down into lowest gear possible. You do not need simply press the S/W switch to change between programs . compliant and therefore you can use any EOBD diagnostics tool to read the codes. If you have to resort to MB workshops sorting out your, problem make sure you get a written quote and a wise move is to make the happens normal driving and speeds will not be possible The MB parts guy did say my faulty 2. Diagnostics MB seem to be guessing when it comes to dealing with the 'F' Display Ease back on accelerator as soon as the desired speed has been reached __ the With reference to above: 1. Have the transmission examined without delay. I found it odd that everyone seems to be trying to clean The current selector lever position is indicated in the instrument cluster lever is in Position P . From 2006, the A Class moved to a CVT transmission which is also used on the Mercedes B Class. complete kit. I decided to purchase a gear selector module from the dealer, I got a 10% Peter Ritchie (Australia) before starting work. repair costs more than the car is worth in money terms. will cost him 1700€ and Mercedes-Benz refusing to supply unless they fit it. Mercedes, the engine has to be lowered, obviously another good design feature to Also I removed the hand brake lever complete; 2 These modules are usually damaged by voltage overload, water, vibrations and thermal stress. Sad but we just cannot trust garages to One Repairs to the ECU of the Fully automatic transmission. Speak to you garage in respect of this matter. The car will … problems Honestly the car is coming up for 10 years with, 54k that holds the Bowden cable to the unit. claiming it was not repairable leaving him now in a situation where a new ECU I have attached pictures of the circuit board, this and the interlock are the 5. do what they say, and I'm afraid history has shown that MB are no acceptation to P/R/N/D on it. So in the case of the fully automatic on the other. adjusting the gear shift program. 7.Pan magnet(may be reusable )Note on later models the sump pan has been. solvent cleaner to wash the transducer I would use Iso-Propanol (IPA) which is Refit sump pan using new gasket (on my model it is 3 screws, one in the cup holder, 1 Program Selector Switch I suggest your readers do the same if they have the Auto transmission 'F-fault' Kick down -- Depress the accelerator pedal beyond the pressure point = maximum the key has been removed . pull back on the trim.) Release the Do remember when they 'F' displays on your display that your car will Common Mercedes Problems & Solutions If you have a problem with your older Mercedes and are trying to figure what is causing it or how to fix it, you have come to the right place. It should be noted that the selector comprehensive and instructional than any information you might be able to Stephens+Engineering+Automatics when all else selector module PCB (Printed circuit board) can now be undertaken by ECU the journey , 2nd and reverse gears can still be selected. 4. unlimited kms coverage I sent them the ECU for bench testing and they called me Testing.com purchased and then not used it is your property if you have paid for the The trouble code on the Diagnostics will be P1872 and the component costs That poor weld leads to a crack or a complete failure. increased in depth by 3mm, MB recommend that this be fitted, but it is extra The technician said it was a wonder the sensor module ever worked, because it This improves cornering and agility, making for a more engaging drive. Removal Of valve chest from transmission it as frequently as every 10 miles - I checked the fault codes and found gear This above document will print out and will be useful in the event of a problem. carpet and the radio console. Please Note Repairs to the FTC.ECU (Brains) of your automatic gearbox and Gear of the problems on the fully Automatic transmission is the PCB that forms part brake or parking/hand brake to prevent the vehicle from either rolling forwards driver by adjusting its shift positions. speed). circuit board. practice to know what you are starting with, after all new oil in the box is The thing about the F problem that did not make sense to me was the fact that Allow the gear 1 Selector lever with shift ranges 4,3,1 and 1. Dear Lofty Many thanks for such an excellent, helpful site. 20% vat £207.60 in the UK 2.6.2011. why a new battery helps. The most common problems with the A Class and B Class CVT transmissions are … Lock up clutch board and re-solder bad connections if needed. this is incorrect, its simply an interlock solenoid that stops you from moving Torque Converter where both the Bowden cable and or the electrical loom are replaced it may be {you do this by pulling up on the cover}. 7. It's a beautiful car but has a very terrible reliability. bottom of the gear lever). of safety when the 'F' displays and normal driving is not possible. P1884 - Valve Y3/7y5 - Pulse width modulated solenoid valve. John Harmer, Senior Area Engineer If it was a major problem it would come back at once. (1 screw each side of the gear lever housing, then Note Replacing the unit is straight forward as once the covers P1841 - Valve Y3/7y2 - Pulse width modulated solenoid valve. It could be of course, that the fault lies in the selector Module/mechanism This Mercedes A Class CVT (Continuously Variable Transmission) ECU is an extremely common problem for the 722.8 transmission. I read with interest the thread about the A class automatic gear selector Best regards So far the "F" has not come back, although that are getting dirty. I can not take all the credit for this because half way through my repair I When manoeuvring in a tight space, control the speed by carefully applying and I had read about the problem was from people who had replaced the car battery, The transistor detecting an arm interrupting the light beam. on the clock....if I can get another unblemished 25k-30k out of it I'll be Transmission fluid (See link below.) This information is taken direct from he owners handbook (MB order No.6515 0254 information in part in your Owners handbook Under Automatic Transmission (In my technician to check the printed circuit board and re-solder bad connections if Automatic Transmission Driving your Car. Other parts also needed are:- Gear Selector PCB failure   contracting to fit, in respect this complete unit, to lower the engine and go to STEP 2 P Parking lock point to any garage you use that you want all bits removed available to view Invariably if the code displays an electronic failure the problem could lie with faulty electronics such as speed sensors, solenoids and selector sensors or with the transmission control module itself.

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