Just started doing this a week or so ago. Runs fairly rough at idle (initial start) for 30-45 seconds, more blue smoke than usual during that time. Within about 1 minute, back to normal. 2 different tanks of fuel, fairly recent filters

ideas? thanks in advance

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Austin, TX
81 240d dd
89 560sel sold

Are you certain you'd say the smoke is blue? That's oil, if so, and the issue is probably a more complicated one.

If it's instead GREY smoke that smells like diesel then it's unburnt fuel. In that case it's more likely a few bad glow plugs.

Have you smelled it? Oil smoke from the exhaust is a pretty strong and distinct smell.

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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino

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you're probably right, more greyish than blue. Didn't think about getting out and smelling, just looking in mirror, will try that tomorrow.

__________________
Austin, TX
81 240d dd
89 560sel sold