The V-belt tensioner provides a constant tension on the belt which is needed to run all of the engine accessories. Over time the tensioner can fail to maintain the proper tension and the belt will start to slip. If this happens it will usually make a squealing noise. The tensioner can also fail by the bearing wearing out - this will cause the belt to wear unevenly and fray along the edges. You should check your tensioner and V-belt every six months for wear, cracking, fraying, delaminating and drying out. If the tensioner is loose or you can wiggle it or if your belt shows any of these signs you should replace them.

Shop now for replacement belt tensioners for your W203 car - Click HERE

Tools required: E10, E12 Torx driver

Applicable Models:
C320 (1998-2004)
E320 (1998-2004)
S320 (1998-2005)
ML320 (1998-2003)
CLK320 (1998-2004)
SLK320 (1998-2003)

This project takes about an hour.

Pelican Parts