Noises

Asked by GuruDBV37 Aug 22, 2017 at 02:19 PM about the 1999 Mercedes-Benz M-Class ML 430 4MATIC

Question type: Maintenance & Repair

My 99 ml 425 screeches when I first start it, once it
is going it is quieT. What could be wrong?

1 Answer
21,865

Gary answered 6 years ago

Screeches at startup or when you rev the engine are usually caused by a belt that is slipping. This can be a worn belt or a bad belt tensioner. Check the belt, if the back side (smooth side) is shiny, you may need a new belt.

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