Question about 1991 Mercedes-Benz 560

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Rattling sound when I accelerate?

The engine runs great @ 209K miles but sometimes when I accelerate I hear a rattling sound. It goes away when I stop accelerating. What is it?

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  • koit82 Jul 14, 2009

    Thats what I initially thought too but I run 93 octane gas and the timing chain replaced 40k miles ago. Any other ideas?

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Run thicker oil epically in the summer. 50 wt Valvoline racing oil worked 4 my 89 s-10

Posted on Jul 25, 2013

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Sounds like timeing is out or you need higher octane gas

Posted on Jul 14, 2009

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