1990 560 SEL idle surges
My SEL will surge intermitantly from normal idle to anywhere from 1200 to 1700 rpm. This can be quite disconcerting when you are trying to slowly back up, or take your foot off the brake at a stop light. Any "usual suspects" I should look at? Also, a two for one question. Sometimes, but not always, and under many different temp. conditions and driving situations, my tranny won't up-shift into 4th gear. My MB shop has told me they "lubed the cable" and the second time, they "tightened it" Still happening. Any ideas?
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Paul Levitt
1990 560SEL
1986 300 SDL
1988 300E
1992 400E (sold after 17yo crashed!)
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