I agree with Benzmac. Have the distributor head done at a shop because as he said especially concerning lambda adjustment. If you have a meter, then fine, but I'd have it done by someone who's done it before. If you do decide to jump into it yourself, you can e-mail me for the specifics. Oh, you might also want to try the Red Line fuel cleaner product. I have only seen it on their website, and don't have any past experience with it but I can say their other products are wonderful. Check PartsShop to see if they have it.
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Rgds,
Aaron Greenberg
MB technician
'67 250SE Cabriolet
'77 450SL
'79 6.9
'79 6.9
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8
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