rjmcc01

I talked to my dealership about my "rough shifts" that I've had with my CPO C350. They say it's because the ECU was reset and it's learning the way I drive. My understanding was just the opposite. The ECU was driving the way the old man that had the car prior to me drove.

Do they reset as part of the CPO checklist? I've put 5K and it's acting the way it did the day I bought it.

Amir_AMG

it doesnt take 5k to "learn the way you drive"..do a search for the tranny reset and give it a few hundred miles to pick up your new driving habits.

Glyn M Ruck

The dealer is talking crap. Tell them to make sure you have the latest TCU software flash & to check all adaptions with Star to ensure correct lock up pressure for each gear etc.

kevink2

Sorry if I'm wrong, but sounds like you are talking about the gas pedal range 5 step reset, which has nothing to do with the TCU.

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Acapulco Bill

Agree with Glyn, the TCU software update is for all 7G before mid-2010, and will improve performance. The difference should be immediate, however after a while the 7G will become sluggish again "learning" that you drive like an old lady every time you come to a traffic light or stop sign, city traffic, mall parking lot etc.

kevink2

Also agree with Glyn. I have another atx car that when I was working, and the TCU had a steady diet of slow traffic and no highway, shifting became lethargic. In that case, I just had to unplug the battery for a bit, and when reconnected shifing was great.

Now, I had to retire about 10 years before I intended ( due to medical disabilty -- with that much pain, I could not have done the 1989 design of the 3-spoke graphite/epoxy wheel that Lance Armsrong used during each TDF (along with mother's little helper)).

Retired, I can avoid rush hours and aggressively drive the car --- shift great all the time now. Not sure if that's the case with a W204.

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