Ive got a 190e with 300.00 miles on it. Ive had it 11 years now and its a 1988. Ill tell you its a dam good little car, sturdy, solid, still holds it style, and I love mine and cant get rid of it. But the truth is the car has nickled and dimed me along the way. Yeah some of it were things that could happen to any car, and some of it were things that made me think that all that stuff you hear about mercedes quality was a myth.
Just keep those fluids clean (oil, tranny,steering)
remember its not a fast car, ive hardly driven mine over 80 mph,
and learn how to do some of the small stuff yourself and you ll be alright.
Mine still drives like a newer car, goodluck with your choice