I have only owned two w123 a 1977 300D and now a 1979 240D but have looked at purchasing bothe the w110diesel the one you are looking at and the 115 chassis diesels.

The 110s had I have been told a great need for greasing and suspension car so be ware of that. Also floor boards and area around the headl lights and radiator support tended to rust I have been told.

Before I even consider buying a car I have the seller on board with the fact that I or he has to take for a full inspection (which I as the prospective buyer pay for). I use the Shop Forum list of reputable independent MB dealers. Also get as much history on the vehicle as you can. Test drive it on the highway no matter how inconvienced the seller may be.

Hope this helps Tom