Anyone have trouble with occasional low speed downshift "thunk". After lifting foot from accelerator, the car occasionally downshifts with a sudden thunk and jerk. Of-course the dealer says this was only a problem with the earlier 430's not the 320's and that the problem was resolved. I can not reproduce this for them as it only occurs once a month or so. They have reset the shift "learn" mode without success. Seeking anyone who has dealt with, and hopefully resolved this issue??????

I believe I heard of this problem before...it happened on E-class as well, I too have experience this downshift trouble in my C280

hopefully someone who have dealt with this can reply