Start/Stop button
The concept

Pressing the Start/Stop button switches the ignition on or off and starts the engine.
The engine starts if the brake pedal is pressed when you press the Start/Stop button.
See also:
Deactivating DSC: DSC OFF
When DSC is deactivated, driving stability is reduced
during acceleration and when driving in
bends.
To increase vehicle stability, activate DSC again
as soon as possible.
Deactivating DSC
...
BMW X3 iDrive Owners Manual
h1 {color: red;}
h2 {color: green;}
h3 {color: blue;}
h4 {color: #FF00FF;}
...
Lane Change Warning System monitors vehicles following behind
Inattentiveness or misjudgement of the distance and speed of a vehicle
approaching from behind can lead the driver into a critical situation when
changing lanes. The optional Lane Change Warning S ...
