I drive a 1994 C280 with 128k miles and it drives as good today as the day I got it. Engine is very strong (it's the straight six).
I currently have a problem with the sunroof not pulling back and the oil leak already mentioned.
The only thing is that it can be a little snug with four adults on long trips.
I average about 26 MPG and that's a 60/40 highway/city mix.