Auto gearbox smoothness.

[Mr Buzz]

Hi everyone,my car is a 2006 C200 CDI SE auto,this is my first auto car,but i was wondering how smooth should the gear changes be?i find it quite jerky,is it the way i'm driving it?is it the way it is?or could there be something wrong,it's only done 31k,i would be grateful for any advise,Thanks.

 

[DSM10000]

Find a local MB specialist with the Star computer so the transmission fluid level can be checked first, it is best to check the level at 80 degrees C and Star can do this. Not sure if your car has the 5 speed or 7 speed gearbox. The 7 speed did have some problems with change smoothness and there were some software revisions that might help if this is the case.

MB gearboxe have a part called a Pilot bush in the gearbox, this carries the eelctrical connections from the transmission control unit to the gearbox internal, the Pilot bush can leak.

I doubt your car has a dipstick fitted, most do not. If the level is low then going to a specialist will ensure it is topped up with the correct fluid.

Gearbox fluid is recommmended to be changed at 37,000 miles so you should be OK from that perspective.

 

[evdok]

Has it been remaped?

 

[Mr Buzz]

Has it been remaped?

No,just a standard car,5 speed geabox by the way,thanks for the reply's.

 

[DSM10000]

Do not forget to let us know what happens and good luck

 

[Mr Buzz]

Do not forget to let us know what happens and good luck

I will,Thankyou very much for your help.

 

[Mr Buzz]

I had the gearbox checked and the oil level was low although the filler tube cap still had the tab unbroken,it drives fine now,but i guess if the oil is leaking out from somewhere i will soon find out,there isn't any leaks coming from under the car, will keep you updated, keep my fingers crossed.

 

[DSM10000]

I had the gearbox checked and the oil level was low although the filler tube cap still had the tab unbroken,it drives fine now,but i guess if the oil is leaking out from somewhere i will soon find out,there isn't any leaks coming from under the car, will keep you updated, keep my fingers crossed.

If it is a slow leak then it may not show until you take off the undertray. It is likely to be from the Pilot bush, only about £20 from MB and about 30 minutes labour to change. Who checked it and topped it up? They really should have had a better look and found the leak.

 

[Mr Buzz]

If it is a slow leak then it may not show until you take off the undertray. It is likely to be from the Pilot bush, only about £20 from MB and about 30 minutes labour to change. Who checked it and topped it up? They really should have had a better look and found the leak.

Merc garage in Cardiff,i asked them about the undertray,said they couldn't see anything leaking,i guess i will have to wait and see if it starts doing the same again,will keep you updated,Thanks.

 

[DSM10000]

If they did not take the undertray off then the leak is often missed. I would not wait, if it was leaking before then it still is leaking, on some models the ATF can track into the gearbox ECU and cause problems

 

[Mr Buzz]

If they did not take the undertray off then the leak is often missed. I would not wait, if it was leaking before then it still is leaking, on some models the ATF can track into the gearbox ECU and cause problems

Ok i will ask a mate of mine if i can use his pit and take the covers off and have a good look,by the way,when you break tag off the atf oil tube to check the level do you need to get another cap or is the same one ok,Thanks,

 

[DSM10000]

You can get a new cap from MB very cheaply, best to seal it and prevent dirt etc getting in.

 

[Mr Buzz]

Iv'e taken the under covers off and can't see any leaks at all,i bet it was never filled correctly last time it had a service,unless the atf oil can find it's way somewhere else.it's driving really well,i will just keep my fingers crossed and hope it's ok now.