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Originally Posted by suntan  Hi! I think I have the same problem too. I'm experiencing some "lumpy" shifting when downshifting from 2-1 (in auto mode). It's really odd and hard to describe, but basically the car slows down, slows down, slows down, and then all of a sudden, it surges forward! A little bit of a "nonlinear" feel, if you know what I mean? This happens in both C and S mode.
I haven't tried manually shifting yet; I'm not sure how that would allow me to diagnose the nature of the problem further. From what I understand, this could either be a mechanical problem (something to do with a valve?) or a software/adaptive problem? Is there anyway to tell between the two without bringing it to the dealer? For example, from what I understand, if the problem is adaptive, then within a few thousand miles, it will go away, but if it is mechanical, it should get worse with time? If so, I should probably just wait and see, right?
Thanks so much!
cheers,
suntan |
Basically in the UK Merc offer a proper M mode on all SLK models and its useful for diagnosis because as daj says it allows you to pick out the bad gear but also try shifts at various rev ranges and force the car to hold the selected gear.
No way to tell the difference between a mechanical problem and a software problem without visiting a dealer sorry mate even we can't tell exactly but if we reset the adaptions and the problem is still present then its going to be mechanical.
If i where you i would get it looked at asap not trying to say your gearbox will go bang if you don't but it will be noted as a visit with this problem.