Nickolas is right so far as I know. Our Lexus LS430 has an adaptive transmission as do nearly all Toyota vehicles. My indie has a Tundra pickup and he says he unhooks the battery about every other wash and that resets the transmission to factory defaults which stiffens the shifting up from his relaxed adaptation. I'm not sure the MB transmissions reset like that, but I've got a vague memory that they do (from another thread). All MB transmissions are adaptive, as are the ones in practically all new"ish" cars. I think if you have more than 5 speeds in the box, it probably adapts.