Replacement: Spark Plugs – Mercedes W203. Professionals Recommend:
- The replacement procedure is the same for all spark plugs.
- Warning! Stop the engine before starting any work – Mercedes W203.
Perform the replacement in the following order:
-
Step 1Open the hood. -
Step 2Use a fender protection cover to avoid damaging the car’s paint and plastic parts. -
Step 3Unscrew the engine cover screws (3 pieces). Use HEX No. HW5. -
Step 4Remove the engine cover. -
Step 5Unscrew the ignition coil fasteners. Use a #E8 drive socket. -
Step 6Remove the ignition coils from the spark plug wells.Replacement: Spark Plugs – Mercedes W203. AUTODOC Tip:Remember the sequence of steps for disassembling the ignition coil. -
Step 7Clean dirt, dust, and debris from inside the spark plug wells. -
Step 8Unscrew the spark plugs. Use spark plug socket No. 16. Use a ratchet wrench. -
Step 9Remove the spark plugs. -
Step 10Apply a thin layer of a special high-temperature anti-seize lubricant to the threads of the new spark plugs. Treat the surface of the terminals of the new spark plugs. Use an electronic spray.