Start/Stop Button

Pressing the Start/Stop button first engages the ACC position, then the ignition, and then switches them off.
If the Start/Stop button is pressed while the brake pedal is depressed, the engine will start.◄
ACC Position
Some electrical consumers are ready for operation. The time and outside air temperature are displayed in the instrument cluster.
The ACC position switches off automatically:
► after the electronic key is removed from the ignition lock
► with the keyless entry function – after touching the surface above the door lock with a finger
Ignition
All electrical consumers are ready for operation. The total and trip odometer readings are displayed in the instrument cluster.
To preserve battery charge, do not leave the ignition and unnecessary electrical consumers switched on with the engine off.◄
ACC and ignition off
All warning and indicator lamps and displays in the instrument cluster go out.
Test yourself
A quick BMW X3 quiz: every answer comes with an explanation and a link to the manual page.