Hi All,

Any advice on fixing the cruise control on a '91 350SD? More specifically, how can you do it without spending $500 and going to specialty shops?

A quick search indicates the primary parts are the amplifier (about $240) and the actuator ($190). I know it's impossible to tell for sure without doing tests, but isn't it usually--I've heard "90%" of the time--a particular part (I had the same problem on my 300DT). If I know what part it is I feel confident enought in buying it (assuming a rational return policy) and going to a good local shop that'll put my parts in for me (they're good but they don't have parts access or the diagnostic equipment). Or how hard is it to replace these yourself? Also, any advice as to where to get the parts?

I've looked around this and another M-B forum and have seen discussions about aftermarket parts and customized systems--mine is a real nice car (perfect condtion, 123,000 miles) and I really don't want to go that route. I want to fix it properly but no way would I go to a dealer and I prefer not to go to a foreign, M-B, or specialty shop.

Thanks!