What to do if your Mercedes C-class drive belt is not working?
Look for cracks, stretching, and missing ribs on the drive belt. Start the engine, and watch the pulleys as they rotate. If a pulley is wobbly, it may need to be tightened or could be damaged. By varying the revs as you watch, will help pinpoint the pulley. Using an automotive stethoscope, listen to each pulley.
How do you remove a serpentine belt from a Mercedes?
Using your 17mm socket, turn the tensioner counterclockwise to remove tension from the belt. Insert your punch or rivet into the tensioner. This will lock the tensioner in place, and keep tension off of the belt. Un-route the belt from the engine pulleys, and out of the engine. Figure 12.
Where is the serpentine belt tensioner on a Mercedes C class?
The C230, C300, and C350 is found with the M272 (6-cylinder) engine. Both engines will be covered, and the steps will be designated as V6 Engine (272) and I-4 Engine (271) for easy identification. Figure 1. The M272 serpentine belt tensioner is on the left.
What makes a Mercedes-Benz drive belt make a noise?
Dirt and water can collect between the two, causing the commonly heard squeal. The bearings inside of the pulleys can become damaged, which creates noise and drag on the drive belt. There are two different engines found in the Mercedes-Benz w204. The first being the M271 (a turbocharged 4-cylinder). The second is the M272 ( V-shaped, 6-cylinder).
Look for cracks, stretching, and missing ribs on the drive belt. Start the engine, and watch the pulleys as they rotate. If a pulley is wobbly, it may need to be tightened or could be damaged. By varying the revs as you watch, will help pinpoint the pulley. Using an automotive stethoscope, listen to each pulley.
What happens if you change the idler pulley on a Mercedes Benz?
Changing the idler pulley on a Mercedes-Benz is a relatively easy job for most DIYers and required less than two hours. A bad idler pulley can cause the serpentine belt to come off. Once the belt comes off, you will experience multiple problems if you continue to operate the vehicle. Power steering is difficult to turn.
What makes a Mercedes C Class belt squeal?
Belt dressing is made by several manufacturers (CRC for example), and can be found at many parts stores. It creates a tackiness between the belt and pulley that helps eliminate belt squeal. If the results from Step 1 did not help you determine a problem with one of your pulleys, It’s time to replace the drive belt.
Dirt and water can collect between the two, causing the commonly heard squeal. The bearings inside of the pulleys can become damaged, which creates noise and drag on the drive belt. There are two different engines found in the Mercedes-Benz w204. The first being the M271 (a turbocharged 4-cylinder). The second is the M272 ( V-shaped, 6-cylinder).