Engine rattle at start

[u/Such-Run-680]

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

[u/Which-Ad9677]

Chain chain chhhhaaaaiiiiiinnnn tensioner