BMW 2009 X6 xDrive50i Owner's Manual

Page of 317
Technology for comfort, convenience and safety
98
Press the BC button on the turn signal lever 
repeatedly until the display appears, refer to 
arrow.
The drive train and wheels are schematically 
depicted. 
Bar graphs show the current distribution of 
drive torque. The longer an illuminated bar is, 
the greater the drive torque in the related wheel.
Malfunction
If xDrive and Dynamic Performance Control are 
malfunctioning, the instrument panel display 
appears in gray.
HDC Hill Descent Control
The concept
HDC is a system for driving downhill in steep 
terrain. This system reduces vehicle speed on 
steep downhill gradients, thus allowing you to 
maintain even better control of your BMW 
under these conditions. The vehicle moves at 
approximately walking speed without active 
intervention from the driver.
HDC is available for activation at vehicle speeds 
below approx. 22 mph/35 km/h. When driving 
down steep hills with a speed below approx. 
22 mph/35 km/h, the vehicle reduces speed 
automatically down to approximately walking 
speed, approx. 5 mph/8 km/h, and then main-
tains this speed at a constant.
Only use HDC in transmission positions D or R.
Increasing or reducing speed
You can use the accelerator or brakes to vary 
this automatically controlled speed within a 
range extending from approx. 4 mph/6 km/h to 
15 mph/25 km/h.
You can specify a target speed within the same 
range by using the lever of the cruise control.
With downhill grade over 10
Ξ you can reduce 
the speed to approx. 3 mph/4 km/h.  Pull  the 
lever of the cruise control beyond the resis-
tance point, arrow
3.
Increasing speed
Pull to the resistance point:
Reduce speed to approx. 4 mph/6 km/h
Pull beyond the resistance point:
With downhill grade over 10
Ξ, reduce 
speed to approx. 3 mph/4 km/h.
Activating HDC
Press the button; the LED lights up.
The HDC display is shown in the instrument 
panel.
The LED flashes when the brakes are applied 
automatically.
Deactivating HDC
Press the button again. The LED and the HDC 
display go out.
HDC is automatically deactivated at speeds 
over approx. 37 mph/60 km/h.
Online Edition for Part no. 01 41 2 600 809 - © 09/08 BMW AG