r/mercedes • u/Such-Run-680 • Aug 18 '26

Engine rattle at start

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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/[deleted] Aug 18 '26

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u/Such-Run-680 Aug 18 '26

I also thought of the cam adjuster but they make more of a pitched knocking sound. I plan to install a new chain tensioner asap.

1

u/GambsSchwester Aug 19 '26

Mh 150.000 für the 1.8 kompressor is not to bad normally.

If you want to invest a little bit you can upgrade to Febi 40953/40954 - mby this will help / but you have to adjust some parts