450sl cold and hot high idle

[Graham]

Originally Posted by blk914

Update on plenum leak. Finally got to pull intake last week-end...just as I suspected, one of the plenum seals had failed. The seals I originally used were evidently aftermarket trash. Found out the hard way, try to use MB (when available) or quality replacement parts, it's worth it in the long run. Ordered new seals (new style are OK, was told plastic ring tightens as temps go up) got everything back together sunday, runs great! Thanks for all the great advise guys!

great stuff!

I have always wanted to replace those seals, but every time I look at those studs, I just know they are going to break! Besides car runs fine so why mess with a good thing!