1977 350 SL bad running

Steven Robertson

New Registration
Aug 10, 2009
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Hi I have just got myself a 1977 SL350 that has a few issues you might be able to help me with.

I think these might be connected, the heater only blows hot air and the engine idles like a pig. Under the bonnet on the passenger side there are 3 small vacum pipes that for some reason seem to have been cut where they come through the bulk head. At the front of the air filter there seems to be a valve that is sucking in air and it looks like these pipes or 2 of them should be connected here. Anyone know where the pipes should go to? I am also looking for a good place for secondhand spares for the car trim bits and pieces mainly?

All help much appreciated

Alex Crow

Senior Member
Jul 9, 2009
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Super Suffolk
Your Mercedes
W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
your two vacuum problems are just that, two different problems. could you perhaps post some pictures? otherwise we are passing water into the wind.
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