See also:

Activating HDC
Press the button; the LED above the button lights up. ...

1998: the fourth generation - common rail direct injection, VALVETRONIC and BMW xDrive
The fourth-generation BMW 3-Series was launched in May 1998 and brought with it another hike in output, comfort and safety. The new model was four centimetres (approx. 1.5 in.) longer and wider th ...

Automatic deactivation
In certain situations, the Automatic Engine Start/ Stop Function is deactivated automatically for safety reasons, such as when the driver is detected to be absent. Malfunction The automatic en ...