When to replace the Fuel Filter on your MERCEDES-BENZ S-CLASS
Recommended replacement interval for the part category Fuel filter : 4 year / 80000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ S-Class Saloon (W221) S 350 CDI 4-matic (221.080, 221.180), MERCEDES-BENZ S-Class Saloon (W221) S 450 CDI (221.028, 221.128), MERCEDES-BENZ S-Class Saloon (W221) S 350 CDI 4-matic (221.080, 221.081), MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI 4-matic (221.080, 221.180), MERCEDES-BENZ S-Class Saloon (W221) S 350 CDI, MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI, MERCEDES-BENZ S-Class Saloon (W221) S 420 CDI (221.028, 221.128), MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI 4-matic (221.080, 221.180), MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI (221.022, 221.122), MERCEDES-BENZ S-Class Saloon (W221) S 350 CDI 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

Tools
Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). List of the tools you'll need:
All-purpose cleaning spray
Torx bit T25
Drive socket # 5.5
Drive socket # 7
Drive socket # 10
HEX bit No.H5
Ratchet wrench
Round-nose pliers
Bulb hand fuel pump
Fender cover
Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). AUTODOC experts recommend:
  • Ensure adequate ventilation of the workplace. Fuel vapors are poisonous.
  • Please note: all work on the car – MERCEDES-BENZ S-CLASS (W221) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the hood.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    Unscrew the engine cover fastener. Use Torx T25. Use a ratchet wrench.
    Step 4
    How to change Fuel Filter on W221 2005 - free PDF and video manuals
    Unscrew the fasteners of the back section of the engine cover. Use a drive socket #10. Use a ratchet wrench.
  2. Step 5
    How to replace MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI 3.0 (221.022, 221.122) 2006 Fuel Filter - step-by-step manuals and video guides
    Remove the back section of the engine cover.
    AUTODOC recommends:
    Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). Do not use excessive force when removing the part as this may damage it.
  3. Step 6
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). To avoid damaging the part when removing it, do not use excessive force.
    Step 7
    W221 S 500 5.5 (221.071, 221.171) 2007 Fuel Filter replacement: free workshop manuals
    Clean the fuel filter housing and the cover. Use all-purpose cleaning spray.
  4. Step 8
    Changing Fuel Filter on MERCEDES-BENZ S-Class Saloon (W221) S 320 CDI 3.0 4-matic (221.080, 221.180) 2008 by yourself
    Loosen the fuel filter mounting. Use HEX No.H5. Use a ratchet wrench.
  5. Step 9
    How to remove MERCEDES-BENZ S-CLASS S 350 BlueTec 3.0 (221.026, 221.126) 2009 Fuel Filter - online easy-to-follow instructions
    Loosen the fastening clamps of the fuel filter pipes. Use a drive socket #5.5. Use a drive socket #7. Use a ratchet wrench.
  6. Step 10
    How to replace Fuel Filter on MERCEDES-BENZ S-Class Saloon (W221) 2010: download PDF manuals and video instructions
    Detach the tubes from the fuel filter. Use round-nose pliers.
    Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). Tip:
    Be careful! Fuel may leak from the filter housing and hoses.
  7. Step 11
    How hard is it to do yourself: Fuel Filter replacement on W221 S 350 CDI 3.0 2011 - download illustrated guide
    Remove the fuel filter.
  8. Step 12
    Need to know how to renew Fuel Filter on MERCEDES-BENZ S-CLASS 2012? This free workshop manual will help you to do it yourself
    Install a new fuel filter.
    Replacement: fuel filter – MERCEDES-BENZ S-CLASS (W221). Tip from AUTODOC:
    Make sure that the fuel filter is positioned correctly. Consider the fuel flow direction mark.During installation, take care to prevent dust and dirt from getting into the fuel filter housing.MERCEDES-BENZ S-CLASS (W221) – It's important to only use high-quality filters.
  9. Step 13
    Changing of Fuel Filter on W221 2013 won't be an issue if you follow this illustrated step-by-step guide
    Clean the fuel filter housing and the cover. Use all-purpose cleaning spray.
  10. Step 14
    MERCEDES-BENZ S-CLASS S 420 CDI (221.028, 221.128) Fuel Filter replacement: online guides and video tutorials
    Attach the pipe to the fuel filter.
  11. Step 15
    Replacing Fuel Filter on W221 2006 S 320 CDI 3.0 (221.022, 221.122) by yourself
    Tighten the fastening clamp of the fuel filter pipe. Use a drive socket #5.5. Use a ratchet wrench.
  12. Step 16
    S-Class Saloon (W221) S 350 BlueTec 3.0 (221.026, 221.126) 2007 Fuel Filter DIY replacement workshop manual
    Press the fuel primer pump several times until it gets hard. Use a bulb hand fuel pump.
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DIY MERCEDES-BENZ S-Class Saloon (W221) Fuel Filter replacement - online guide
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