Recommended replacement interval for the part category Spark plug : 18 month / 30000 km

Important!

This replacement procedure can be used for:
MERCEDES-BENZ VIANO (W639) 3.7 (639.811, 639.813, 639.815), MERCEDES-BENZ VIANO (W639) 3.7 (639.815), MERCEDES-BENZ VIANO (W639) 3.2 (639.713, 639.813, 639.815), MERCEDES-BENZ VIANO (W639) 3.2 (639.711, 639.811, 639.813) … 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

Alternative products

Spark plug

Replacement: spark plugs – MERCEDES-BENZ VIANO (W639). Tools you need:

                      High-temperature anti-seize lubricant
                    
                      Spark plug socket # 16
                    
                      Ratchet wrench
                    
                      Torque wrench
                    
                      Round-nose pliers
                    
                      Fender cover

Buy tools

Replacement: spark plugs – MERCEDES-BENZ VIANO (W639). AUTODOC experts recommend:

The replacement procedure is the same for all spark plugs.
All work should be done with the engine stopped.

Replacement: spark plugs – MERCEDES-BENZ VIANO (W639). 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

Remove the spark plug wire connectors from the spark plug wells. Use round-nose pliers.

Replacement: spark plugs – MERCEDES-BENZ VIANO (W639). Professionals recommend:
Be careful to avoid damaging spark plug wires.Remember the sequence of the spark plug wires connectors.
Step 4

Clean dirt, dust and debris from inside the spark plug wells.
Step 5

Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
Step 6

Take out the spark plugs.
Step 7

Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs.
Step 8

Install the new spark plugs into their mounting seats.
Step 9

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-BENZ VIANO (W639). 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.
Step 10

Install the spark plug wire connectors into the spark plug wells. Make sure you hear a click indicating that it is locked in place.

AUTODOC recommends:
Replacement: spark plugs – MERCEDES-BENZ VIANO (W639). Follow the installation steps.
Step 11

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

Step 12

Shut off the engine.

Step 13

Remove the fender protection cover.

Step 14

Close the hood.

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