tgennings

Hi new to the forums....

I've had my 2012 c250 coupe for about 3 months now, and at first it seemed to shift really smoothly, but for some reason now, between 3-5 gears it kicks or jerks when it shifts up and down. I have no idea why and don't really know where to start.....

I've been trying to do some research and all I have come up with is to have the transmission fluid changed and to have the computer updated.

Anyone with similar issues or ideas on where to start? I'm afraid to take to to the dealer until I have an idea why this is happening all of a sudden .

My car has about 88,000kms

I used to use the manual shift option when driving , is it possible 5he computer learned the way I was shifting??? If so can I reset it myself??

Any help greatly appreciated Thanks

tgennings

Anyone? ?

Plutoe

To do it correctly you need someone with DAS Xentry, XDOS or Vediamo to connect and look at the transmission control module control log.


That log will provide the information on what is going on and provide a direction for the diagnostics.

Funkwagen

Did you have/Do you know if the transmission serviced (fluid and filter replaced) at around 60,000km?

cfmistry

His coupe has the 7g+ transmission (MY2012) and shouldn't need a transmission fluid service until 100k km / 70k mi.

MB Marko

i was told 60,000km each transmission fluid service if its 2013 its under warranty, well it should be. my 2012 is still under warranty take it in

tgennings

I had the local import auto garage look at it, the mechanic plugged the computer into it and said it wasnt throwing any codes or anything. It's defiantly shifting hard and jerking between 3-5 gears. I don't have service records on the car I've only had it for 3 months.....

This is frustrating

MB Marko

did you buy it from a Mercedes dealership? and do you have warranty still?

tgennings

No not from a Mercedes dealer..... I don't think any warranty left, it seemed to have stared when the cold weather came along.... anyone know what factory warranty is on transmission

Woodstock, ontario

Narry

Well first start with a TCU reset which you can search for the how to. Then if you're still having the issue, you can try our TCU reflash and see if it helps. Try the TCU reset first.

MB Marko

Call any Mercedes dealer give your VIN number and ask you might still have the power train warranty. So engin and transmission could still be covered it's worth a shot

yacoub.alyacoub

check the engine/gear mounts

I'm having those now need to be replaces my car just reached 50K 2012 C200

I'm going to change them in kuwait as their dealer is exactly half the price of doing it here in Doha

ezshift5

IIRC, the transmission adaptive feature is not hard to confuse.

Bypassing the manual shift function and driving smoothly for awhile (I admit not knowing how long you would need to do this) may be productive.

As much as my coupe tends to sooth, I would be remiss were I not to mention the automatic - with the adaptive function - can sometimes be a PITA............but it's a beautiful car.

And - like some beautiful women - (well, you get it)


ez

tgennings

OK I will these ideas..... now I'm leaning towards computer updates, anyone had this done?

Am I the only c250 owner with this issue

tgennings

Anyone else?

michail71

Mine is silky smooth but I have a thread on it being rather noisy in lower gears.

tgennings

Mine used to be smooth and I keep hearing that i should change transmission fluid, does that really make a huge difference ??

michail71

Oh, do you have the C250 Sport with the optional Sports plus package (red stitching, 18 inch wheels)? That's the only one that can be manually shifted. It would have paddle shifters.

On cars without this package the manual shifting on the knob only limits the top gear up to the rev limiter. This is for downhill driving.

Seems odd to me they designed it this way as software wise it's two separate programs that do similar things. Guess they can charge more that way.

tgennings

No mine is a Canadian car with no paddle shifters...it had the +/- to use manual shift on the shifter

Knightmare69

I would try the tcu reset like Narry suggested and you can also try to change the fluid. I change mine yearly as preventative maintenance as it doesn't cost much all said and done.

Ashraf Ghraizi

hello, what was the problem with your c250 ? i think i have the same problem my car shifts perfect until the 4th gear but nothing to show on scanner