I turn the ignition to the start position, then back. If I do this 2-3-4 times, the engine doesn't "clatter" upon cold start. If I don't, and start engine first try, I get the clattering until oil pressure rises.

Anyone have a clue what's at play here? It appears as if I'm "priming" something ... but nonetheless am befuddled.

TIA all!

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-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi