I spent the 200 bucks for the Mercedes dealer inspection before I bought my 190 and found that that car had only been in for repair on 3 occassions. The only thing that they recrommended I replace was the heater fan and the fan speed select. The bearings were shot in the fan and it rattled and the speed control had a piece broken in the internals and could not be fixed.
Well worth the 200 for peace of mind.

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89 190E
2.6L
Arctic white
Grey leather
Sunroof
Pirelli P400 rubber
Smoked corners