Sounds pretty normal for a Mercedes of that age. A lot of little things that can be repaired individually, by the interested and capable hobbyist; will drive the typical motorist crazy and bankrupt if you are having it done in a shop. Nothing I read here says "lemon", just a higher-level European car 20 years old. I have fixed most of these or similar items on my '86 S-klasse: previous owner was a non-technical (i.e. typical) owner who parked it in the garage. I took it home on a flatbed and fixed it. Most cheap cars are tossed away before they get this far and there is not much wrong with them except they are not wanted anymore.