From another thread:

Here in the US the Eights started with the 450SL in 1973 (could be late 72). They went all the way till 1989 with variations of 8 cylinder engines.

The 450, 380 and 560. The numbers referring to their displacement.

The 380 had a single row timing chain up until 1984. It was then updated to a double row. Doing this update is quite costly. Appox $3k here in the US. However, there is still maintenance with the dual row as there are guides and tensioners that should be maintained....not nearly as costly though.

Here's a list common replacement items:

- Since these cars are far from lightweight all suspension pieces suffer after so many years. Especially if sitting unused. So if not replaced RECENTLY figure on Shocks (Bilstein), Subframe bushings, ball joints, springs...etc.

- Fuel injection system on 81 and up...it's the wonderful Bosch CIS system. Not unlike the Porsche 911 you will have cold/warm/hot start problems. As usual many throw thousands chasing idle, start and missing problems.

- Climate control - This has to be the most unneccessarily complicated system I've ever seen in my life. And they will all develop problems. It is absolutely unintuitive as well. To make it more fun it's all vacuum operated with vacuum actuators buried behind the dash. They can be rebuilt inexpensively but getting to them and getting to the right one is the challenge. The Monovalve is a common piece in the heating system to go. Luckily it's inexpensive and quikly replaced.

- Rust - Not the worst cars regarding this. However, the older you get the more prone you are to suffering.

- Convertible top...Very simple mechanical setup. I like it. Hard top same thing...well done.

- Interior....Dash cracks can be a problem. Seems blue cracks the most.

- Radiators also have issues, especially with a plastic filler neck. Once they break it's almost impossible to repair and not cheap to replace.

- Radio...by Becker. I'll say no more.

Like any other car the better it's been maintained by the PO the better for you.

__________________
Rick

'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac