12 13 511 Removing/replacing spark plugs(S63)

Necessary preliminary tasks:

Read out the fault memory of the DME control unit.
Check stored fault messages and process procedure.
Switch off ignition
Remove INTAKE FILTER HOUSING .

IMPORTANT: Ignition coils must not be contaminated by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail!
The silicone tube of the spark plug connector is coated with talc to reduce the pulling forces. The silicone tube must NOT be oiled or greased. This would greatly reduce the durability of the silicone material, which can lead to a malfunction of the ignition coil.
Ignition coils must not be contaminated by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail!

Version 1 :

Release screws (1).

Tightening torque 17 10 7AZ .

Lay expansion tank with retaining plate to the side.

Fig 1: Identifying Expansion Tank Retaining Plate Screws

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Version 2:

Release screws (1).

Tightening torque 17 10 4AZ .

Do not remove coolant hoses (2)!

Disconnect expansion tank for charge air cooler (3) from holder.

Fig 2: Identifying Screws, Coolant Hoses And Expansion Tank For Charge Air Cooler

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Release screw (1).

Tightening torque 13 71 10AZ .

Place holder (2) with A/C lines aside.

Feed out expansion tank for charge air cooler and lay to the side.

Fig 3: Identifying Screw And A/C Lines Holder

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Slacken nut (1).

Tightening torque 13 71 9AZ .

Remove vacuum reservoir (2) left of holder and place aside.

Fig 4: Identifying Nut And Vacuum Reservoir

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Slacken nut (1).

Tightening torque 13 71 9AZ .

Remove vacuum reservoir (2) right of holder and place aside.

Fig 5: Identifying Nut And Vacuum Reservoir

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Unlock plug catch (1) on ignition coil (2) and unplug connector.

Pull out the ignition coil (2) slowly in a smooth upwards movement.

NOTE: There is a possibility that the silicone tube will tear and therefore be destroyed.

This procedure is applicable to all ignition coils.

Fig 6: Identifying Plug Catch And Ignition Coil

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Installation note:

Position the ignition coil (1) and gently push it to the limit position, if necessary by twisting it back and forth slightly. Then check anti-twist lock.

The rubber cap must completely surround the sealing collar of the cylinder head cover.

NOTE: If rubber parts are squashed, the ignition coil can slip out again during engine operation.

Fig 7: Identifying Ignition Coil

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Installation note:

Push connector (1) with connector catch (2) open onto ignition coil.

Carefully close connector catch (2) in direction of arrow.

The connector catch must snap into place without great effort.

Fig 8: Identifying Connector And Connector Catch

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The connector must be positioned on the counter piece with hardly any gaps when the locking lever is being closed. In the process, the cheeks of the lever are positioned inside the counter piece.

NOTE: The locking lever can become deformed if it is not installed correctly. This means that there is no longer a safety lock on the plug connection. As a result, the connector can slip out during engine operation (loose contact, misfiring).

NOTE: Delete fault memory.
Assemble engine.