12 13 511 Replacing ignition coils (B58)
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 failure of the ignition coil.
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.
Necessary preliminary work:
- Remove ACOUSTIC COVER .
- Remove rear acoustic cover as follows:
- Remove center bulkhead upper part sound insulation
- Thread out acoustic cover (1) to top of the guides in the marked areas.
Removal:
Unlock and disconnect plugs (1).
Release screw (2).
Thread out and remove ignition coil (3).
Installation:
Thread out and install ignition coil (3).
Tighten screw (2).
Tightening torque: 8 Nm
Attach and lock connector (1).
Connector (1) must engage audibly.
Required follow-up work:
- Install ACOUSTIC COVER .
- Install rear acoustic cover.NOTE: Check acoustic cover for cracks and damages, and replace as necessary.