Notes
IMPORTANT:
Special tool 33 4 409 must not be removed!
Insert special tool 33 4 408 into special tool 33 4 401.
Fig. 125: Positioning Special Tools (33 4 408), (33 4 401) And (33 4 409)
Posi
Notes
WARNING: Risk of burning!
Only perform this work after engine has cooled down.
Necessary preliminary work
Check function of DME control unit
Switch off ignition
Remove AIR FILTER HOUSING
Unlock plug connection and detach.
Unclip control sensor cable from holder.
Release control sensor w
REPLACING ALL SPARK PLUGS (N54, N63, N74)
Necessary preliminary tasks
Switch off ignition.
Remove IGNITION COILS.
IMPORTANT: Wear safety goggles.
Oil and dirt particles may get into your eyes!
Clean spark plug slot with compressed air.
Unscrew spark plugs with special tool 12 1 220 and extensi