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
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REMOVING AND INSTALLING OR REPLACING BATTERY POSITIVE LEAD
(BETWEEN STARTER, ALTERNATOR AND BATTERY POSITIVE TERMINAL)
Necessary preliminary tasks:
Read out fault memory of DME control unit; if necessary, work through
test schedules.
Switch off ignition.
Disconnect battery negative lead.
Rem
TEST REQUIREMENTS FOR HEADLIGHT VERTICAL AIM ADJUSTMENT
Car parked on level ground.
Replace faulty glass and mirrors and blackened light bulbs.
Check tire pressure and correct if necessary.
Apply load equivalent to one person on driver's seat (approx. 75 kg).
Vehicle with full fuel tank or app