See also:

Switching on/off
Switching on/off Press the button. ...

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

The BMW X3 xDrive28i: 6-cylinder power for the entry model.
For the US, the entry-level BMW X3 xDrive28i will feature BMW's award-winning magnesium/aluminum 3.0-liter inline-6. In 2006 and 2007, the "N52" was awarded the distinction of being one ...