Removing Spark Plugs

→ Let hot components cool down.

→ Wear personal protective gear.

1. Screw off M6 nut -1-  on protective plate.
2. Unscrew two Torx screws (M6 x 20) -arrows-  on the turbocharger.
3. Pull intake air lines out of the flange on the turbocharger.
   Fig 1: Locating Turbocharger Flange

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4. Press intake air lines out of the brackets -arrow-  in the engine compartment.
   Fig 2: Locating Intake Air Lines Bracket

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   WARNING: Danger of objects or loads falling down

   • Risk of squashing or crushing

   → Secure components to prevent them from falling down.

5. Support engine with a mounting jack.
6. Screw off M12 collar nuts on the two engine mountings.

   Information 

   • When lowering, the engine must not rest on the rear axle cross member. 
7. Carefully lower the engine.
8. Remove heat protection panels at the sides by unscrewing two speed nuts on each panel.

   → 635019 REMOVING AND INSTALLING REAR BUMPER .

9. Release cable plugs -1-  on the electronic adjusters on the turbochargers and pull them off.
   Fig 3: Locating Cable Plugs

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10. Unscrew hexagon socket head bolt (M6 x 25) -arrow-  on the right electronic adjuster (cylinder bank 4-6) using a long socket-wrench insert (a/f 5) with a ball head.
    Fig 4: Locating Electronic Adjuster Bolt

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11. Unscrew hexagon socket head bolts (M6 x 25) -arrows-  on the right electronic adjuster using a long socket-wrench insert (a/f 5) with a ball head.
12. Press hinge socket -1-  off the ball joint and remove right electronic adjuster.
    Fig 5: Locating Bolts On Electronic Adjuster Linkage

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13. Unscrew two Torx screws (M6 x 12) -arrows-  and remove heat shields.
    Fig 6: Locating Heat Shield Screws On Cylinder Bank 1-3

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    Fig 7: Locating Heat Shield Screws On Cylinder Bank 4-6

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14. Slide rubber sleeves down on the ignition coil connectors.
15. Release cable plugs -1-  and pull them off the ignition coils.
16. Unscrew inner Torx screws (M6 x 25) -arrows-  .
    1. 16.1. The intake air line must be moved when removing the ignition coil on cylinder 3.
17. Remove ignition coils.
    Fig 8: Locating Ignition Coils Screws On Cylinder Bank 1-3

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    Fig 9: Locating Ignition Coils Screws On Cylinder Bank 4-6

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    NOTE: Incorrect tool

    • Risk of damage to components

    → Use prescribed tool.

18. Unscrew the spark plugs using the tool Spark Plug Socket Wrench Nr. 14  with 3/8" Extension, 16° Movable Nr. 15  .
    Fig 10: Removing Spark Plugs On Cylinder 2

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