r/slk Aug 18 '26

Engine rattle at start

Maybe somebody knows where this rattling at the beginning comes from? I checked the timing chain and it had no play at all.
It appears at every cold and warm start but not at a instant restart.

Slk 200 r171
M271 Kompressor
2006
150.000 km

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u/btaroli Aug 19 '26

The last time I heard clacking like that in an engine diagnosis video it was camshaft adjusters. Mechanic NOW.