How to carry out replacement: Poly V-Belt 500 SL 5.0 (129.066) SL R129
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Change SL R129 320 3.2 (129.064) Poly V-Belt yourself – manuals and video tutorials

How to change serpentine belt on MERCEDES-BENZ SL (R129) – replacement guide

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When to replace the Poly V-Belt on your MERCEDES-BENZ SL
Recommended replacement interval for the part category Serpentine belt : 30000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ SL (R129) 500 (129.068), MERCEDES-BENZ SL (R129) 320 (129.064), MERCEDES-BENZ SL (R129) 280 (129.059) … 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 SL (R129) and other MERCEDES-BENZ models
Alternative products
How to change Serpentine belt on SL R129 500 SL 5.0 (129.066) – step-by-step instructions for straightforward car repair Serpentine belt
Tools
Replacement: serpentine belt – MERCEDES-BENZ SL (R129). Tools you might need:
Combination spanner #16
Fender cover
Buy tools
Replacement: serpentine belt – MERCEDES-BENZ SL (R129). AUTODOC experts recommend:
  • All work should be done with the engine stopped.
Carry out replacement in the following order:
  1. Step 1
    Open the bonnet.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    How to change Poly V-Belt on SL R129 1989 - free PDF and video manuals
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: serpentine belt – MERCEDES-BENZ SL (R129). Do not use excessive force when removing the part as this may damage it.
  2. Step 4
    How to replace MERCEDES-BENZ SL (R129) 500 SL 5.0 (129.066) 1990 Poly V-Belt - step-by-step manuals and video guides
    Remove the air intake hoses.
  3. Step 5
    SL R129 300 SL-24 3.0 (129.061) 1991 Poly V-Belt replacement: free workshop manuals
    Pull aside the V-ribbed belt tensioner pulley. Use a combination spanner #16.
  4. Step 6
    Changing Poly V-Belt on MERCEDES-BENZ SL (R129) 320 3.2 (129.063) 1992 by yourself
    Remove the V-ribbed belt.
    Replacement: serpentine belt – MERCEDES-BENZ SL (R129). AUTODOC recommends:
    Check the condition of the tensioner pulley and idler pulley. Replace them if necessary.
  5. Step 7
    Return the tensioner pulley to its initial position.
    Step 8
    How to remove MERCEDES-BENZ SL 300 SL 3.0 (129.060) 1993 Poly V-Belt - online easy-to-follow instructions
    Install the V-ribbed belt.
    Replacement: serpentine belt – MERCEDES-BENZ SL (R129). Tip from AUTODOC:
    Make sure that the V-ribbed belt fits all pulleys snugly.
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