In this warm weather, I don't have to turn the idle speed adjuster at all when starting. It might idle a little rough for a few seconds, but I hold my foot on the pedal like on the 300TD for a few seconds, and then its all fine.
I can't offer any advice on how to go about adjusting the idle or addressing the issues, just giving you my experience.
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1985 300TD-euro 352,000 mi
1974 240D (1?)52,000 mi - has a new home now
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