crazy1469

For the last couple of days i noticed that my car shifts funny from first to secound, regardless if in S or M mode, feels almost like its slipping and the it engages a little harsh...
Has anyone had any transmission problems with their c63???

jacob502

are you sure it the transmission and not that your tires need replacement?

crazy1469

You make a good point but no my tires are still ok, and even at light throtle it still happens, and specially when the car is cold

theturkster

im having the same issue.. made a post about it too. not sure whats causing it. is your car Tuned?

Illusive

I have this problem as well, it's the worst when I'm coasting slow towards a light, and then on the throttle when the light turns green before I come to a complete stop. It's a very abrupt jolt.

crazy1469

Lets hope some of the experts chime in on this isue.....most likely i will be taking it in to the dealer to have this looked at

HoozyerdaddyC63

The C63 actually downshifts pretty hard at times so coming to a complete stop can be a bit annoying.

It used to happen to me all the time in California when coming to a stop, but I haven't really felt it too much with the city driving in Chicago.

I'm curious about the shifting from 1st to 2nd though. I don't think I've ran across that issue before.

crazy1469

No my car is still on factory tune...

AMGFTW

My car does this from time to time after a lot of highway miles. I have found that reseting the trans adaptations by pulling the negative terminal on the battery for 10 minutes will fix the issue.

andrew c230k

If your car is downshifting from 2nd to 1st hard in sport mode only you need to get your valve body replace and hope your car still has warranty on it... mine was downshifting hard from 2nd to 1st when it was cold approaching a stoplight and it was annoying... dealership under warranty replaced the value body in the transmission the problem has been fixed.

natman316

For 2012 cars I think it's the mct. Keep it in comfort mode for city driving.

HoozyerdaddyC63

Thanks for the heads up. My warranty is good through 2016 so I'll look into that.

jims5

K&N or carbon delete? My car acted like that especially when cold with K&N and carbon delete. Put stock filters back in and car is now smooth.

crazy1469

No, my car is completely stock...no mods.
gonna call the dealer tomorrow to book it in so they can have a look at it

crazy1469

UPDATE:

I droped of the car at the dealer and there is definatly a problem with the transmissio, if its the valve body or in the tranny it self is not know yet....well let u huys know more as i know

xtyper

Sorry to hear that. I'm sure you'll be taken care of promptly, and keep us posted as to the cause.

Harold1898

thats why they have a warranty. Never hesitate to take the car into a dealer and get them to check/fix any little thing that arises.

crazy1469

that's what i though that i would be taken care, specially being a mercedes and an AMG.....WRONG!!! the are no better than any other manufactor....always trying to get out of paying for anything under warranty.....
i am a cert automotive tech, i know the drill if a car came in with a trans problem, you know it aint going to fix it, but you sell the costumer that already spent a **** load of money to buy the car, you sell him a $600 tranny flush, and then a week later he comes back with the same problem because a fluid flush is not gonna fix ****, then the will replace what needs to be replaced....so as per manufactor reccomended maintnace shedule, a trans service is not deu untill 60k...my car only has 42k...so i told them to put the car together with no flush, and when the tranny drops they will then have no choice but to replace it...or will they try to sell me a flush then too????

ohh and the service adviser told me that they can see that the car has been driven "HARD"....i replied...ofcorse if i wanted to drive it normal i would have bought a C250 and not a C63....****in rediculous....stuff like this makes my blood boil.

Harold1898

sorry to hear that. It is a bit different over here. I have had 3 MB cars and never had any issue with a dealer. All helpful and happy to do the work as it costs them nothing, it is underwritten and paid for by the factory who have a budget for such things. I used to work for a certain British maker of luxury vehicles and we allocated .5% of revenue to warranty.

SonnyakaPig

I really feel for you. I have the same experience with MB. They don't want to fix anything unless the problem is undeniable. And I agree, it would be very upsetting to hear that you have driven your car hard when the car is marketed to enthusiasts that like to drive. It's a very strange thing with MB, they like to sell performance cars but they don't want you to use the performance. If I told you have the **** I've heard from MB, you would know I understand where you're coming from.

crazy1469

i just got a call from the service manager and he told me that they are going ahead with the tranny service, and if that does not solve the issue that they will swallow the cost of it.
the problem is the most costumers don't know their rights...so you get taken advantage of...

crazy1469

that is how it should be....you already pay enough money for the car, and that's why the have warranty...i bet any money that if the car was outside of warranty the would try to sell me a new transmission even before knowing whats wrong with it lol.

SonnyakaPig

I'm glad to hear they are working with you. That's a positive.

Keep us updated.

Sincity

So, did the service solve your problem?

OCJeff

I just yesterday experienced a very strange shift experience in my '09 C63. From a stop in a straight line I leaned on the accelerator pretty hard through second, and then let off the gas right around probably 6K RPM (when I expected it to shift to 3rd). I heard a loud engine/tranny sound and it very harshly (in a slowing manner, not accelerating) shifted the vehicle to 3rd. I quickly looked down and saw the hazard triangle (the one that flashes during ESP engagement) flash twice.

I was on dry flat pavement, and it was not a situation where there should have been any tire spin (especially since I was off the gas).

At this point I was already slowing down. I didn't get any CEL and the car was running fine after that, but the shift does concern me. It's not something a car should ever do. Has anyone seen this as a reproducible issue?