REPLACING ALL SPARK PLUGS (N42, N40, N46, N45, N52, N52K, N51)
Special tools required:
12 1 171
12 1 200.
Necessary preliminary tasks:
Switch off ignition
Remove ignition coils.
Unscrew spark plugs with special tool 12 1 171.
Installation:
Tighten down spark plugs with special tool 12 1 171a
Principle
The Steering Assistant helps keep the vehicle in
the lane. For this purpose, the system executes
supporting steering movements, for instance
when driving in a curve.
General information
Depending on the speed, the system orients itself
according to the lane markings or vehicles in
front.