Eseries Belt Handover Problem

I had a similar issue on my Eseries. Is your serpentine belt properly tensioned? Check the tensioner pulley; if it's weak, the belt might not engage correctly during handover. Listen for unusual engine noise too; it could indicate a failing tensioner.

Good point. What exactly did you observe when your tensioner was failing? Was it consistent, or only under certain conditions?

Initially, it was intermittent, mostly noticeable during cold starts with a squealing noise. Eventually, the belt started slipping more consistently, impacting engine performance. I'd recommend getting it checked at a workshop; a defective tensioner can cause significant damage.

Thanks! Confirmed defective belt tensioner; repair cost 455€. Much appreciated!