C 320 cdi gearbox issue

[TuxMan]

just a bit of advice guys ,my C320 cdi auto with a 7 speed auto box has started to drag on the rundown ,its not freewheeling ,also i can now feel the downchanges when slowing down . its still under warranty does it need a trip to the dealer ?? wonder what the problem is ??

[BlackC55]

You may need a software update if you have had not had one before on the gearbox control module. Also there are known issues with the valve body causing rough gear changes.

[TuxMan]

thanks looks like i will have to have word with my local dealer .simon

[SprintV8]

Also the oil level need's to be spot on.
It's also checked with the Auto Oil temp no hotter than 40Degress C.

There's also gearbox adaption's that can be carried out using the Mercedes Lap top kit.
Again these must be done to the instruction's.