1981 300D, 135K miles.

Great car, but: The vaccuum system will go out on you, door locks will be problematic due to this; Will want to switch to new ac system; Speedo will stop working, at least the odometer will stop, $500 replacement/repair; motor mounts will need replacing, and am now experiencing leaking oil seals on front crank case and head gasket. Definitely worth it for the do it yourselfer!