Important!

This replacement procedure can be used for:
MERCEDES-BENZ S-Class Saloon (W140) 400 SE, SEL/S420 (140.042, 140.043), MERCEDES-BENZ S-Class Saloon (W140) S 420 (140.042, 140.043) … 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

Ignition coil

Replacement: ignition coil – MERCEDES-BENZ S-CLASS (W140). 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

Buy tools

Replacement: ignition coil – MERCEDES-BENZ S-CLASS (W140). Tip from AUTODOC:

Warning! Shut down the engine before starting any work – MERCEDES-BENZ S-CLASS (W140).

Carry out replacement in the following order:

Step 1

Open the bonnet.

Step 2

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

Step 3

Disconnect the earth cable terminal from the battery. Use a combination spanner #10.
Step 4

Unscrew the inlet pipe fasteners. Use a Phillips screwdriver. Use a drive socket #10. Use a ratchet wrench.
Step 5

Remove the fastening bolts.
Step 6

Remove the inlet pipe.
Step 7

Remove the ignition coil cover.
Step 8

Disconnect the high tension cable from the ignition coil.
Step 9

Unscrew the fasteners of the ignition coil terminals. Use a drive socket #10. Use a ratchet wrench.
Step 10

Disconnect the terminals from the ignition coil.
Step 11

Unscrew the ignition coil fasteners. Use a combination spanner #10.
Step 12

Remove the ignition coil.
Step 13

Install a new ignition coil.
Step 14

Screw in the ignition coil fasteners. Use a combination spanner #10.
Step 15

Connect the terminals to the ignition coil.
Step 16

Treat the ignition coil terminals. Use dielectric grease.
Step 17

Screw in the ignition coil terminals. Use a drive socket #10. Use a ratchet wrench.
Step 18

Connect the high tension cable to the ignition coil.
Step 19

Fit the ignition coil cover.
Step 20

Attach the inlet pipe.
Step 21

Install the fastening bolts.
Step 22

Screw in the inlet pipe fasteners. Use a Phillips screwdriver. Use a drive socket #10. Use a ratchet wrench.
Step 23

Connect the earth cable terminal to the battery.

Step 24

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

Step 25

Shut off the engine.

Step 26

Remove the fender protection cover.

Step 27

Close the bonnet.

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