12 13 511 Replacing ignition coils (S55)
Attention!
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 failure of the ignition coil.
Attention!
Read and comply with NOTES ON PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .
Necessary preliminary work:
- Remove CORROSION PROTECTION COVER .
Removal:
Unlock connector fastener (1) for ignition coil (3) and pull off connector (2).
Slowly pull the ignition coil (3) up and out without jerking it.
This procedure is applicable to all ignition coils.
Installation:
Mount the ignition coil (3) and gently press it to the stop, turning back and forth if necessary. Then check anti-twist lock.
The rubber cap must completely surround the sealing collar of the cylinder head cover.
Push connector (2) with connector fastener (1) open onto ignition coil (3).
Carefully close connector fastener (1) in direction of arrow.
The connector fastener must snap into place without great effort.
The connector must be positioned on the counter piece with hardly any gaps when the locking lever is being closed. In the process, the crank webs of the lever are positioned inside the counter piece.
Required reworking:
- Install the CORROSION PROTECTION COVER .