Spark Plug: Service and Repair
WM 287020 Removing and fitting spark plugs
Tools
Technical values
Preliminary work for removing spark plugs
1. Remove rear cover -> 519419 Removing and installing rear cover 519419 Removing and Installing Cover for Rear Underbody.
Removal
Removing spark plugs
1. Slide rubber sleeves of ignition coil plug connections upwards.
2. Release and pull off plugs on each ignition coil.
3. Unscrew two M6 x 25 fastening screws -arrow- each per ignition coil and remove the six ignition coils individually.
Screws for ignition coils
CAUTION
Incorrect tool for changing the spark plugs!
- Ceramic body breaks!
-> Use approved tool only.
4. Unscrew spark plugs using the tool spark plug socket wrench NR.14 with 3/8" extension, 16° movable NR.15.
Installation
Installing spark plugs
CAUTION
Incorrect tool for changing the spark plugs!
- Ceramic body breaks!
-> Use approved tool only.
1. Install spark plugs using spark plug socket wrench NR.14 and 3/8" extension, 16° moveable NR.15. The tightening torque is reduced if the spark plugs are removed and installed again for another activity. Do not get spark plugs mixed up during reinstallation.
2. Insert ignition coils into the spark-plug recesses and tighten using two M6 x 25 fastening screws each.=> Tightening torque: 7.5 ftlb.
Screws for ignition coils
3. Attach connector for each ignition coil (connector must engage audibly).
4. Slide on rubber sleeves for ignition coil plug connections.
Subsequent work for installing spark plugs
1. Install rear cover -> 519419 Removing and installing rear cover 519419 Removing and Installing Cover for Rear Underbody.