When to replace the Spark Plug on your MERCEDES-BENZ G-CLASS
Recommended replacement interval for the part category Spark plug : 18 month / 30000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ G-Class Off-Road (W460) 230 GE (460,2), MERCEDES-BENZ G-Class Off-Road (W460) 230 GE (460,2) 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 – Spark Plug for G-Class Off-Road (W460) and other MERCEDES-BENZ models
Tools
Replacement: spark plugs – MERCEDES-BENZ G-CLASS (W460). Tools you'll need:
Wire brush
High-temperature anti-seize lubricant
Dielectric grease
Torque wrench
Combination spanner #10
Drive socket # 10
Spark plug socket # 16
Ratchet wrench
Phillips screwdriver
Crow bar
Fender cover
Replacement: spark plugs – MERCEDES-BENZ G-CLASS (W460). Professionals recommend:
  • The replacement procedure is the same for all spark plugs.
  • Warning! Shut down the engine before starting any work – MERCEDES-BENZ G-CLASS (W460).
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
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    Disconnect the earth cable terminal from the battery. Use a combination spanner #10.
  2. Step 4
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    Unscrew the inlet pipe fasteners. Use a Phillips screwdriver. Use a drive socket #10. Use a ratchet wrench.
  3. Step 5
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    Remove the fastening bolts.
  4. Step 6
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    Remove the inlet pipe.
  5. Step 7
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    Disconnect the spark plug wires from the spark plugs.
  6. Step 8
    How to replace Spark Plug on MERCEDES-BENZ G-Class Off-Road (W460) 1984: download PDF manuals and video instructions
    Clean dirt, dust and debris from inside the spark plug wells.
  7. Step 9
    How hard is it to do yourself: Spark Plug replacement on Mercedes W460 300 G 3.0 (460.3) 1985 - download illustrated guide
    Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
  8. Step 10
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    Take out the spark plugs.
  9. Step 11
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    Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs.
  10. Step 12
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    Install the new spark plugs into their mounting seats.
  11. Step 13
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    Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 22 nm torque.
    Replacement: spark plugs – MERCEDES-BENZ G-CLASS (W460). AUTODOC recommends:
    Don't tighten the plugs with excessive force. Exceeding tightening torque can damage the thread connection. Be careful when working with a spark plug wrench. Its skewing can cause damage to the threaded connection.
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DIY MERCEDES-BENZ G-Class Off-Road (W460) Spark Plug replacement - online guide
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