How to carry out replacement: Poly V-Belt 300 SE, SEL/S320 (140.032, 140.033) W140
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Change W140 S 420 (140.042, 140.043) Poly V-Belt yourself – manuals and video tutorials

How to change serpentine belt on MERCEDES-BENZ S-Class Saloon (W140) – replacement guide

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Download your free tutorial and fix MERCEDES-BENZ S-Class Saloon (W140) S 600 6.0 (140.056, 140.057) problems yourself Download for free 747.52 KB Poly V-Belt for W140 Shop now
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When to replace the Poly V-Belt on your MERCEDES-BENZ S-CLASS
Recommended replacement interval for the part category Serpentine belt : 30000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ S-Class Saloon (W140) S 350 Turbo-D (140.134) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Poly V-Belt for S-Class Saloon (W140) and other MERCEDES-BENZ models
How to change Serpentine belt on W140 300 SE, SEL/S320 (140.032, 140.033) – step-by-step instructions for straightforward car repair Serpentine belt
How to change Serpentine belt on S-Class Saloon (W140) – tips for proper car maintenance
Serpentine belt for S-Class Saloon (W140) Diesel (150 hp)
Tools
Replacement: serpentine belt – MERCEDES-BENZ S-CLASS (W140). List of the tools you'll need:
Combination spanner #16
3/8" square drive extension bar
Fender cover
Buy tools
Replacement: serpentine belt – MERCEDES-BENZ S-CLASS (W140). AUTODOC recommends:
  • All work should be done with the engine stopped.
Replacement: serpentine belt – MERCEDES-BENZ S-CLASS (W140). Take the following steps:
  1. Step 1
    Open the bonnet.
    Step 2
    How to change Poly V-Belt on W140 1991 - free PDF and video manuals
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
  2. Step 3
    How to replace MERCEDES-BENZ S-Class Saloon (W140) 300 SE, SEL/S320 (140.032, 140.033) 1992 Poly V-Belt - step-by-step manuals and video guides
    Unscrew the fastening bolt of the belt tensioner. Use a combination spanner #16 (2 pieces).
  3. Step 4
    W140 S 350 3.5 Turbo Diesel (140.134) 1993 Poly V-Belt replacement: free workshop manuals
    Use a lever of the correct diameter to loosen the tensioner and remove the fastening bolt. Use a 3/8" square drive extension bar.
  4. Step 5
    Changing Poly V-Belt on MERCEDES-BENZ S-Class Saloon (W140) 500 SE, SEL (140.050, 140.051) 1994 by yourself
    Remove the V-ribbed belt.
    AUTODOC recommends:
    Check the condition of the tensioner pulley and idler pulley. Replace them if necessary.
  5. Step 6
    How to remove MERCEDES-BENZ S-CLASS S 500 5.0 (140.050, 140.051) 1995 Poly V-Belt - online easy-to-follow instructions
    Install the V-ribbed belt.
    Replacement: serpentine belt – MERCEDES-BENZ S-CLASS (W140). Professionals recommend:
    Make sure that the V-ribbed belt fits all pulleys snugly.
  6. Step 7
    How to replace Poly V-Belt on MERCEDES-BENZ S-Class Saloon (W140) 1996: download PDF manuals and video instructions
    Return the tensioner to its original position and install the fastening bolt. Use a 3/8" square drive extension bar.
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