Hi guys, I'm new to the forum having just bought a CLK200 (1998). There appears to be a problem with my new car, however, when idling the car sounds like a diesel, in other words a bit rough!

I showed it to a mechanic friend of mine who said it was the belt tensioner moving. This is as a result of a problem in the alternator pully which is not 'slipping' or some such thing. Does this sound like a feasable explanation?

If so, I was wonderingwhether MB parts are interchangeble? i.e. could I get an alternator(or pully) from another 2 litre MB and use it on my CLK?

Korks.

 

The tensioner can very well cause the noise,

 

Thanks for that.

What would need replacing then? Just the tensioner? Or could it be tightened?

K