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How to change spark plugs on Mercedes W202 – replacement guide
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Recommended replacement interval for the part category Spark plug : 18 month / 30000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ C-Class Saloon (W202) C 180 (202.018), MERCEDES-BENZ C-Class Saloon (W202) C 200 (202.020), MERCEDES-BENZ C-Class Saloon (W202) C 180 (202.018), MERCEDES-BENZ C-Class Saloon (W202) C 230 (202.023) … View more
The steps may slightly vary depending on the car design.
MERCEDES-BENZ C-Class Saloon (W202) C 180 (202.018), MERCEDES-BENZ C-Class Saloon (W202) C 200 (202.020), MERCEDES-BENZ C-Class Saloon (W202) C 180 (202.018), MERCEDES-BENZ C-Class Saloon (W202) C 230 (202.023) … View more
The steps may slightly vary depending on the car design.
How to change spark plug on MERCEDES W202 [TUTORIAL AUTODOC]

All the parts you need to replace – Spark Plug for C-Class Saloon (W202) and other MERCEDES-BENZ models
Alternative products

High-temperature anti-seize lubricant
Spark plug socket # 16
HEX bit no.H5.
Ratchet wrench
Torque wrench
Flat Screwdriver
Fender cover
Replacement: spark plugs – Mercedes W202. Tip from AUTODOC:
- The replacement procedure is the same for all spark plugs.
- All work should be done with the engine stopped.
Replacement: spark plugs – Mercedes W202. Recommended sequence of steps:
- Step 1
Open the hood. - Step 2
Use a fender protection cover to prevent damaging paintwork and plastic parts of the car. - Step 3
Detach the air intake hose clamp. Use a flat screwdriver. - Step 4
Unplug the mass air flow sensor connector. - Step 5
Disconnect the air intake pipe from the air filter housing. - Step 6
Unscrew the clamp that fastens the air filter hose to the throttle body. Use a flat screwdriver. - Step 7
Detach the vacuum pipe. Use a flat screwdriver. - Step 8
Dismantle the air filter pipe. - Step 9
Unscrew the engine cover fastener. Use HEX No.H5. Use a ratchet wrench. - Step 10
Remove the engine cover. Use a flat screwdriver.AUTODOC recommends:Replacement: spark plugs – Mercedes W202. To avoid damaging the part when removing it, do not use excessive force. - Step 11
Remove the spark plug wire connectors from the spark plug wells.Replacement: spark plugs – Mercedes W202. Professionals recommend:Be careful to avoid damaging spark plug wires.Remember the sequence of the spark plug wires connectors. - Step 12Clean dirt, dust and debris from inside the spark plug wells.Step 13
Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench. - Step 14
Take out the spark plugs. Use the spark plug socket #16. - Step 15
Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs. - Step 16
Install the new spark plugs into their mounting seats. Use the spark plug socket #16. - Step 17
Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 27 nm torque.Replacement: spark plugs – Mercedes W202. AUTODOC experts recommend: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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