You have one or more glow plugs out. You can try just replacing the defective one(s) or replace the whole set. I replaced one then two months later a different one failed, then a week later two more failed, so rather than wait for the remaining two to fail, I replaced the four, two blown two still good. They're relatively easy to replace with the manifold in place. You just need a 1/4'' ratchet set with one flexible joint. I followed the directions on Dieselgiant.com. using a piece of tubing to start the new plugs is an invaluable piece of advice. Same site tells you how to check the plugs too.




'91 350SD 534,000
'87 300SDL 236,000
'94 SL 500 45,000

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jcciem
'94 SL5000 60,000
'91 350SDL 545,000
'91 350SD 197,000
'00 E55 AMG 77,000