Rear doors
Push the locking lever on the rear doors down.
The door can now be opened from the outside only.
Safety switch for the rear
Press button on the driver's door if children are being transported in the rear.
This locks various functions so that they cannot be operated from the rear: safety switch.
BMW X3 Service & Repair Manual > Engine wiring loom: Replacing wiring harness section for ignition and injectors (N55)
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE
(ESD PROTECTION) .
Necessary preliminary work:
Read out the fault memory of the DME control unit.
Switch off ignition.
Disconnect BATTERY EARTH LEAD .
Remove IGNITION COIL COVER.
Remove CLEAN AIR P ...