Replacing the belt tensioner on your 190E/300E(2.3, 2.6 & 3.0) can be a tricky project but with a little patience this is a 3 hour job at most.

There are several things that will need to come off the car to replace your belt tensioner including the fan. A word of caution here before you begin: Depending on the engine and accessories on your car there can be very, very little room to work between the fan and the radiator. You will need an 8mm Hex to remove the viscous clutch on the fan, and we had to grind down a socket to make it fit. The radiator is very expensive and delicate, and can be easily damaged while working around it; you may consider removing the rad first as a precaution.

We have tensioners in stock now and ready to ship HERE!

Some cars came with mechanical water pump/alternator belt tensioner assemblies while others came with a hydraulic type. Note that the mechanical style is only available as an assembly - the bearing or pulley is not available separately. Therefore, it is important to identify which style is on your vehicle BEFORE placing your order.

Let us know what questions you have associated with this project!