Mercedes-Benz Forum - View Single Post - ICV Weirdness (among other things)
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post #3 of (permalink) Old 05-25-2019, 03:48 PM
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Date registered: Jan 2011
Vehicle: 1983 380-SEL, '67 220D (sold), '65 200D (sold), '75 L-206D (sold)
Location: Los Angeles area
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I fixed an high idle by resoldering the Idle Control Unit. It should be a last resort step, because you may damage it. If the solder contacts look milky, then this may be the issue. In these cars in California and in Europe I have fixed AC controllers, cruise controls and idle control boards all by resoldering. Obviously this step is useful due to the cost of replacing the boards. If you have access to an alternate board, that would be a good way to test prior to attempting any solder fix.

Hope that helps.
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