I think Paul has summed it up pretty good. If I would add anything it would be that if you can find one with the Sportline option ('92-'95), you wouldn't regret it. But they are pretty rare.
Of course, the usual items when buying any MB apply, such as get one with good service records, make sure the AC blows cold, get a PPI done from a competant mechanic, etc.
Oh, and the earlier ones, up to '92 at least, had head gasket problems, so if you can find one that has already had it repaired, that would be a good thing.
Happy hunting!
