In my other post (considering a 84 300SD) you can read more about this car. I posted about this there as well. I just looked at the car and it is in excellent condition appearance wise, with no rust, excellent interior and shiny original paint.

The possible problem that has me concerned is the severe shake the engine has at idle. It will actually shake the entire car. Just the slightest acceleration- the engine will smooth out as smooth as silk. Its only at idle when it does it. It has 330K and the seller stopped driving it last summer because the A/C went out. It has been in the garage for a few months. He said it was not doing it before and it may need a "tune-up". I know nothing about Mercedes. Could this be something as simple as a tune-up, or is it something major? My dad said it sounded like an injector is going bad. I really like this car, as it is in excellent condition and if it is nothing major- I will probably buy it. I am supposed to go back tomorrow in the daylight and drive it. I wanted to check here first to check on this engine problem before I bought it. BTW- he is asking $2399 for the car, but I think I can get it for less than that. ANY advice/information greatly appreciated.