 Buy low miles and look for signs of hard driving. Cruises at 100+ with ease , handles well for an old unit.  Update ,A/C went out,compressor lockup. Will need complete ac overhaul. However all non Mercedes parts originally so cost is surprisingly low,like any American car.  Did change trans filter and fluid to Amsoil synthetic . As well as engine oil. Highway mileage has been 25 mpg at high speed ,80+  amazingly! At lower speeds mileage drops. Still great !