How much does it cost to change a Mercedes belt tensioner?
The average price to change the belt tensioner at the dealer ranges between $400-$650. Local repair shops will charge between $280-$450. The DIY cost to change the Mercedes-Benz drive belt tensioner ranges between $50-$120, even if you have to buy the tools needed for this job and a new serpentine belt.
How to replace a Mercedes 190E drive belt?
Place the Mercedes-Benz tool # 103-0040 (yellow arrow) in between the grooves on the housing and slowly rotate the fan until the tool engages the hole in the back of the pulley. Insert lower right shows what it looks like with the pulley off.
What should the torque be on a Mercedes tensioner?
Torque the tensioner bolts to the recommended manufacturer specifications. Typical torque for the tensioner bolts ranges between 25Nm to 35 Nm. Check with your dealer. Install the drive belt. Make sure it is routed on all the pulleys properly. If the belt does not reach, make sure it is not sitting on top of one of the pulleys.
How do you remove a tensioner from a Mercedes?
Remove the top Torx bolt using an E12 Torx socket and a 2″ extension. Remove the lower Torx bolt. Some models also have a shock attached to the tensioner. Remove the upper bolt from the shock to disconnect it from the engine block.
What’s the best way to change a tensioner?
Use a 17mm socket to move the tensioner up (service) position. Insert a metal pin in the tensioner hole to keep the tensioner up. A 5mm Allen wrench or bolt can be used as a pin. The pin needs to be strong enough to withhold shear force.
Do you need to replace the drive belt on a Mercedes?
While it is not required to replace the drive belt, it makes sense to replace it simultaneously as the tensioner. It is ok to reuse the old belt if it does not show wear, cracking, degradation, or drying. Park, your Mercedes-Benz, set the parking brakes, and allow the engine to cool down.