I think there is quite a difference. Your 94 C180 has a 4 speed auto that starts in 2nd gear. The 97 u drove has a 5 speed auto that has an adjustable driving program that drives according to speed and holds gears up hills etc. The 5-Speed starts in first for more spirited driving. I think also they changed some things to the motor for the 97 update which made it more free-revving. Funny thing is, power of the 94 and 97 is the same.

Chris

300TE
E280