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How to change serpentine belt on Mercedes W124 – replacement guide
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Recommended replacement interval for the part category Serpentine belt : 30000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ E-Class Saloon (W124) E 300 D (124.131), MERCEDES-BENZ E-Class Saloon (W124) E 300 Turbo-D 4-matic (124.333), MERCEDES-BENZ E-Class Saloon (W124) E 300 Turbo-D (124.133) … View more
The steps may slightly vary depending on the car design.
MERCEDES-BENZ E-Class Saloon (W124) E 300 D (124.131), MERCEDES-BENZ E-Class Saloon (W124) E 300 Turbo-D 4-matic (124.333), MERCEDES-BENZ E-Class Saloon (W124) E 300 Turbo-D (124.133) … View more
The steps may slightly vary depending on the car design.
How to change serpentine belt on MERCEDES W124 [TUTORIAL AUTODOC]

All the parts you need to replace – Poly V-Belt for E-Class Saloon (W124) and other MERCEDES-BENZ models
Serpentine belt
Alternative products

Combination spanner #16
3/8" square drive extension bar
Fender cover
Replacement: serpentine belt – Mercedes W124. AUTODOC recommends:
- All work should be done with the engine stopped.
Replacement: serpentine belt – Mercedes W124. Take the following steps:
- Step 1Open the bonnet.
- Step 2Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
- Step 3Unscrew the fastening bolt of the belt tensioner. Use a combination spanner #16 (2 pieces).
- Step 4Use a lever of the correct diameter to loosen the tensioner and remove the fastening bolt. Use a 3/8" square drive extension bar.
- Step 5Remove the V-ribbed belt.AUTODOC recommends:Check the condition of the tensioner pulley and idler pulley. Replace them if necessary.
- Step 6Install the V-ribbed belt.Replacement: serpentine belt – Mercedes W124. Professionals recommend:Make sure that the V-ribbed belt fits all pulleys snugly.
- Step 7Return the tensioner to its original position and install the fastening bolt. Use a 3/8" square drive extension bar.
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