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Discussion Starter #1 (Edited)
I ran into this weird issue last Saturday. I took my cla out of my parking lot and then driving for a few minutes hit the interstate. As soon as i was picking up speed after merging the dash beeped an alert " Reversing not possible. Service required". Then i took the exit and stopped at a gas station. The reverse gear wont apply. Tried shutting down the engine and starting but didnt help. Tried restarting a few times and then called mercedes help (via mbrace). They booked for a towing truck. About 5 mins later everything was fine and reverse gear engaged. So i cancelled towing as it was weekend anyways. Drove the next day (~30-40 miles) without any issues and took it for servicing today. The technician said this is the first time they have seen it and are still diagnosing the problem.
Did anyone else ever have this problem? I saw a few guys on another forum ran into this issue but there wasnt any proper solution.

Any thoughts?
 

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I seem to recall reading about this issue somewhere. In any case keep us posted on what the dealer finds and hoping for a quick resolution. Good luck
 

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wow, good luck, whats the miles and car? cla250 or 45?

I ran into this weird issue last Saturday. I took my cla out of my parking lot and then driving for a few minutes hit the interstate. As soon as i was picking up speed after merging the dash beeped an alert " Reversing not possible. Service required". Then i took the exit and stopped at a gas station. The reverse gear wont apply. Tried shutting down the engine and starting but didnt help. Tried restarting a few times and then called mercedes help (via mbrace). They booked for a towing truck. About 5 mins later everything was fine and reverse gear engaged. So i cancelled towing as it was weekend anyways. Drove the next day (~30-40 miles) without any issues and took it for servicing today. The technician said this is the first time they have seen it and are still diagnosing the problem.
Did anyone else ever have this problem? I saw a few guys on another forum ran into this issue but there wasnt any proper solution.

Any thoughts?
 

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I seem to recall reading about this issue somewhere. In any case keep us posted on what the dealer finds and hoping for a quick resolution. Good luck
theres been a few with this issue! im wondering if the bugs still havent been worked outta the DCT.
 

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I ran into this weird issue last Saturday. I took my cla out of my parking lot and then driving for a few minutes hit the interstate. As soon as i was picking up speed after merging the dash beeped an alert " Reversing not possible. Service required". Then i took the exit and stopped at a gas station. The reverse gear wont apply. Tried shutting down the engine and starting but didnt help. Tried restarting a few times and then called mercedes help (via mbrace). They booked for a towing truck. About 5 mins later everything was fine and reverse gear engaged. So i cancelled towing as it was weekend anyways. Drove the next day (~30-40 miles) without any issues and took it for servicing today. The technician said this is the first time they have seen it and are still diagnosing the problem.
Did anyone else ever have this problem? I saw a few guys on another forum ran into this issue but there wasnt any proper solution.

Any thoughts?
Never heard of this issue but one thing my sales rep told me when I picked up my car is to be very careful when engaging reverse or drive. The car must be fully stopped before changing drive modes (R or D). Not saying you were not waiting for the car to stop but reading your issue reminded me of this recommendation. Let us know the model/year of your car and keep us informed on what they find.
 

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Wait, what? I normally go forward really fast (usually 75+), engage the e-brake, and then reverse. Have I been doing it wrong? :crackup:
 

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Wait, what? I normally go forward really fast (usually 75+), engage the e-brake, and then reverse. Have I been doing it wrong? :crackup:
lol, really?!

on a serious note, yeah keep us updated as that sounds quite dangerous
 

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Wait, what? I normally go forward really fast (usually 75+), engage the e-brake, and then reverse. Have I been doing it wrong? :crackup:
i believe wizz was saying if its rolling slowly.. dont engage in reverse and he is right.. many people do that.. when the car is not in full stop they put it in reverse or what eve.r. this could seriously affect transmission life. not sure in benz.. maybe the electronic transmission have protocols that protects it from this stuff and would not allow the driver to shift in situation that would damage it..
 

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i believe wizz was saying if its rolling slowly.. dont engage in reverse and he is right.. many people do that.. when the car is not in full stop they put it in reverse or what eve.r. this could seriously affect transmission life. not sure in benz.. maybe the electronic transmission have protocols that protects it from this stuff and would not allow the driver to shift in situation that would damage it..
Yeah, that's exactly what I meant. After reading my original post, I guess I opened up a door to the funny guys on this forum! lol! We have very fragile transmissions and it does'nt take much to f..k them up!
 

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Yeah, that's exactly what I meant. After reading my original post, I guess I opened up a door to the funny guys on this forum! lol! We have very fragile transmissions and it does'nt take much to f..k them up!
im hoping its not fragile...but since it has so many electronics.. and sensors.. i suspect sensors would start giving the issues before any mechanical issues would start to happen, and this will be very expensive repair! ... since it requires a benz specialist with STAR tools.
DCT in theory should last longer, since it has 2 clutches, so while you are on first gear.. the second gear is already engaged and ready to go so the transition is smoother, less friction... therefore i guess the wear would be less!. im not expert in DCT.. but per our read that what i udnerstood.
ah well we will see! ..
 
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Discussion Starter #11
Its 2014 cla 250. Havent heard anything yet from the technician but he thinks a part may also need replacement. It has about 6100 miles on it and what's strange is i got this on the interstate when picking up speed. I did feel something wrong with the transmission and took the next exit and stopped completely. Then it wont go to reverse anymore for atleast 10 minutes. After that everything was fine.
wow, good luck, whats the miles and car? cla250 or 45?
 

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well let us know how it goes.

we should probably make a log of all mechanical issues to track it and count how many are happening and maybe report :D. to force mb issue service bulletins or recalls for everyone if its a design/component issue.

Its 2014 cla 250. Havent heard anything yet from the technician but he thinks a part may also need replacement. It has about 6100 miles on it and what's strange is i got this on the interstate when picking up speed. I did feel something wrong with the transmission and took the next exit and stopped completely. Then it wont go to reverse anymore for atleast 10 minutes. After that everything was fine.
 

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Discussion Starter #13
So the technician informed that someone from MB corporate will be taking a look at it and giving the final diagnosis as they are unable to diagnose the root cause and he thinks the whole transmission may be replaced as they think it may not be safe without it.
 

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interesting and scary as well :D.
ah well. keep us posted... thanks for sharing

So the technician informed that someone from MB corporate will be taking a look at it and giving the final diagnosis as they are unable to diagnose the root cause and he thinks the whole transmission may be replaced as they think it may not be safe without it.
 

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Discussion Starter #15
So the transmission is getting replaced. They don't want to risk it as they don't know why the issue happened and the technician said that they would do thorough testing after the replacement before releasing the car. Anything that I should be worried about ? Its just scary that the transmission has to replaced completely in about a year of ownership.
 

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So the transmission is getting replaced. They don't want to risk it as they don't know why the issue happened and the technician said that they would do thorough testing after the replacement before releasing the car. Anything that I should be worried about ? Its just scary that the transmission has to replaced completely in about a year of ownership.
well you are the first to have this issue. so we still dont know if its a transmission design issue or just your car.. maybe bad sensor or what ever. but certainly concerning.
i may consider havng them upgrade u to a c class maybe? :). c is not where as nice as cla though.. but i do believe its maybe more durable and built stronger. dont know i never tried the new c. but its rear wheeldrive so it has the old known transmission.
 

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Discussion Starter #17
I wouldnt mind an upgrade even though i love the cla design more the c. I got the new C class as a loaner though so I can have few days to enjoy the C300. He told me that MB has a separate department that will tear down all the parts and look into this issue but transmission replacement is the best option for me.
well you are the first to have this issue. so we still dont know if its a transmission design issue or just your car.. maybe bad sensor or what ever. but certainly concerning.
i may consider havng them upgrade u to a c class maybe? :). c is not where as nice as cla though.. but i do believe its maybe more durable and built stronger. dont know i never tried the new c. but its rear wheeldrive so it has the old known transmission.
 

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I wouldnt mind an upgrade even though i love the cla design more the c. I got the new C class as a loaner though so I can have few days to enjoy the C300. He told me that MB has a separate department that will tear down all the parts and look into this issue but transmission replacement is the best option for me.
By curiosity, when you pick up your car, please ask how much this transmission swap would have cost you if you were not under warranty. Maybe this will make you sell the car right after the warranty is over (unless you are currently leasing).
 

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Discussion Starter #19
Its been about a year and three months since i bought the car. I will ask about the transmission cost. Does anyone know if this kind of transmission replace (not a user fault) gets reported to carfax and if it affects my resale value?
By curiosity, when you pick up your car, please ask how much this transmission swap would have cost you if you were not under warranty. Maybe this will make you sell the car right after the warranty is over (unless you are currently leasing).
 

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Its been about a year and three months since i bought the car. I will ask about the transmission cost. Does anyone know if this kind of transmission replace (not a user fault) gets reported to carfax and if it affects my resale value?
it doesnt. however mostpeople who are purchasing an expensive car would want to look at the service records.
its really not a bad thing to have a transmission replaced specially by the dealer.. that means your transmission warranty is now renewed to 40k 4 years which is standard transmission warranty.
so actually ur new buyer should be happy about this. not the reverse
i have a question on your driving habbits... how do you consider yourself , do u pedal shift a lot, do you downshift a lot, or is it always eco mode, was it always sport... do u accelerate hard, do you use parking brake specially parked on inclines, inclined driveways, and parked downhill?
i know that you should not let the weight of the car rest on the transmission gears... meaning, when you are on an incline, and want to park. u should engage parking brakes before letting go the brakes.
most people do not use that parking brake, and they let the weight of car rest on the transmission gears. ... this could wear out your transmission.
also shifting in reverse when not in full stop and in cla, opening the door while the car is rolling slowly :D.
 
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