I have the chance to buy a 1978 280SL Auto, 98k on the clock, this would be my first Mercedes. It has 7 months mot but hasn't been used since 2/12. it was a bit damp smelling inside and the drivers carpet was very wet. It ran well and the auto box shifted cleanly as best I could see/hear although I didn't get a road test. There is some rust in the engine bay especially around the nearside suspension strut top. The car is probably about condition 3. Firstly are there any major weak points or things I should be looking out for and can anybody give a rough idea of value. All advice appreciated.