1991 500SL - Poly V-Belt tensioner, where is it? on which pulley?

[tvenu]

i think I know why my battery light flickers and stays lit very dim, the belt feels loose and not tight. the alternator pulley is on the far left, pulley #6 so if not tight it will slip

can somebody, tell me where the tensioners are? on a 1991 500 SL?

thanks.

[Mike Miller]

It is approx. centered on the front of the engine. It is mounted in solid rubber. It most likely needs replacing as the rubber has probably broken loose.