Acceleration assistant – BMW X3 xDrive30i 2009 User Manual

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Activating HDC

Press the button; the LED lights up.
The LED flashes when the brakes are applied
automatically.

Deactivating HDC

Press the button again; the LED goes out.
HDC is deactivated immediately above approx.
35 mph/60 km/h and after approx. 10 seconds
when the ignition is switched off.

Using HDC

Manual transmission:
Use HDC in low gears and in reverse.
Automatic transmission:
You can use HDC in every drive position.

Malfunction

If the LED in the button goes out in the HDC
mode or fails to light up when the button is
pressed:
HDC is temporarily not available, because the
brake temperature is too high.

Malfunction in vehicle stability control

systems

The warning lamp lights up yellow.
The brake assistant is malfunctioning.
Have the system checked as soon as

possible.

Display of the previously described mal-
function on Canadian models.

If one of the malfunctions described
below occurs, drive with restraint and

caution and avoid full braking; otherwise, acci-

dents can occur. When driving on poor road
surfaces, avoid full throttle or kickdown position
of the accelerator pedal as these could cause
damage to the drive system.

The warning lamp for the brake system
lights up in red, together with the warn-
ing lamps for ABS and DSC/xDrive. In
addition, a warning signal sounds.
The driving stability control systems
have failed. It is then possible to exert
driving force only via the rear axle.
If the brake system warning lamp lights

up in yellow in the described combination, then
the EBV Electronic brake-force distribution is
still available. Have the system checked as soon
as possible.

Display of the previously described mal-
function on Canadian models.

The warning lamp lights up continu-
ously and a warning signal sounds:
Both DSC and DTC or the xDrive all-

wheel drive system have failed.
The stabilizing interventions of DSC or the all-
wheel drive system xDrive are no longer avail-
able. It is then possible to exert driving force
only via the rear axle. Have the system checked
as soon as possible.

Acceleration assistant

The acceleration assistant allows you to conve-
niently start off on inclines. You do not have to
use the handbrake.

Hold the vehicle with the brake pedal.

Step off the brake and immediately start off
with no trouble.

The acceleration assistant holds the vehi-
cle for approx. 2 seconds after the brake

is released. Depending on the load or when
towing a trailer, it is also possible for the vehicle
to roll backward slightly during this interval.