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 (W203) C 200 Kompressor (203.045), MERCEDES-BENZ C-Class Coupe (CL203) C 200 Kompressor (203.745), MERCEDES-BENZ C-Class T-modell (S203) C 200 Kompressor (203.245)

The steps may slightly vary depending on the car design.

How to change spark plug on MERCEDES-BENZ С W203 [TUTORIAL AUTODOC]

Replacement: spark plugs – Mercedes W203. Tools you might need:

                        Electronic spray
                      
                        HEX bit No.HW5.
                      
                        Drive socket # E8 
                      
                        Spark plug socket # 16
                      
                        Ratchet wrench
                      
                        Torque wrench
                      
                        High-temperature anti-seize lubricant
                      
                        Fender cover

All the parts you need to replace – Spark Plug for C-Class Saloon (W203) and other MERCEDES-BENZ models

 
    MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.045)
  
    MERCEDES-BENZ C-Class Coupe (CL203) C 200 Kompressor (203.745)
  
    MERCEDES-BENZ C-Class T-modell (S203) C 200 Kompressor (203.245)

Replacement: spark plugs – Mercedes W203. Professionals recommend:

The replacement procedure is the same for all spark plugs.
Warning! Shut down the engine before starting any work – Mercedes W203.

Carry out replacement in the following order:

Step 1

Open the hood.
Step 2

Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
Step 3

Undo the engine cover screws (3 pieces).Use HEX No.HW5.
Step 4

Remove the engine cover.
Step 5

Unscrew the fasteners of the ignition coils.Use a drive socket #E8.
Step 6

Take out the ignition coils from the spark plug wells.

Replacement: spark plugs – Mercedes W203. Tip from AUTODOC:

Remember the sequence of steps for ignition coil demounting.
Step 7

Clean dirt, dust and debris from inside the spark plug wells.
Step 8

Unscrew the spark plugs. Use the spark plug socket #16.Use a ratchet wrench.
Step 9

Take out the spark plugs.
Step 10

Apply 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 electronic spray.
Step 11

Install the new spark plugs into their mounting seats.
Step 12

Screw new spark plugs and tighten them.Use the spark plug socket #16.Use a torque wrench.Tighten it to 25 nm torque.

Replacement: spark plugs – Mercedes W203. Professionals 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.
Step 13

Install the ignition coils to the spark plug wells.Make sure you hear a click indicating that it is locked in place.

AUTODOC recommends:

Replacement: spark plugs – Mercedes W203. Follow the installation steps.
Step 14

Tighten the fasteners of the ignition coils.Use a drive socket #E8.Use a torque wrench.Tighten it to 15 Nm torque.
Step 15

Run the engine for a few minutes.This is necessary in order to make sure that the component operates properly.
Step 16

Shut off the engine.

Step 17

Install the engine cover and secure it.Use HEX No.HW5.Use a ratchet wrench.
Step 18

Remove the fender protection cover.
Step 19

Close the hood.

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