I have a rattling noise coming from the engine, not necessarily on the cold start. During operation, particularly at idle something rattles. The tech said that it is a timing chain and there is an easy fix ( $200 ). He will replace a chain pensioner or something like that, which can stretch further than the original and keep the chain tensioned. Is this possible ? Car is a 300CE 24 with 85,000 mls.

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Dmitry
90' 300CE
17" Intra Signums
Brulen mufler
Euro Headlights/Clear Blinkers
White gouges (made my own)