IndexDataTechnologyRepairsCar careControlsOverview
197n
The transmission of power to the four
drive wheels is provided permanently
through a transfer box. The distribution
of torque between the front and rear
axles is 38% to 62%.
Traditional differential locks at the front
and rear axles and in the transfer box
are not required. Their function is taken
over by automatic braking intervention
at all four wheels. These traction inter-
ventions are governed by Automatic
Differential Brake (ADB-X), a sub-func-
tion of DSC.
If a wheel tends to slip, it is braked
automatically by ADB-X until it once
again gains traction, and drive force
can be transmitted to that wheel. In
addition, the drive force is distributed
to the remaining wheels during this
530us133
system intervention. Engine output is
also reduced if necessary.
When the DSC is deactivated, the
ADB-X traction intervention is set for
the maximum drive force. However,
the engine intervention and the stability
controls are no longer available. For
this reason, DSC should only be deacti-
vated in the exceptional circumstances
described on page 95.
The BMW X5 is a vehicle for all types of
roads. The permanent four-wheel drive
provides a significant degree of vehicle
stability and tractive power under all
road conditions. It assists in critical
situations such as driving in extreme
winter conditions or on bad roads. Precision sensors monitor the wheel
speeds, the steering angle, lateral
acceleration, brake pressure and the
movement of the vehicle around its
vertical axis.
If differences in wheel speeds occur, the
system recognizes the danger of wheel-
spin and reduces the engine's drive
torque. If necessary, the system also
responds with additional braking inter-
vention at all four wheels.
In addition, DSC permanently monitors
the vehicle's current operating condition
and compares it with an ideal condition
that is calculated from the sensor
signals. If deviations from this occur
(understeering or oversteering, for
instance), DSC can stabilize the vehicle
in fractions of a second by adapting
engine output and with the assistance of
braking intervention at individual
wheels. This way, as long as the skid
can still be managed under the laws of
physics, these kinds of dangerous skids
are prevented even before they can
start.
You may need some time to become
accustomed to this system intervention.
However, it provides optimum drive
force and vehicle stability. The braking
intervention may be accompanied by
certain sounds specific to the system.
Four-wheel drive DSC
Everything from A to Z
renewal146
rotation between front and
rear 147
specifications 150
tread 145
Tire Quality Grading 146
Tools 174t
Torque 206
Tow fittings 191t
Towing the vehicle 191t
Tow-starting 192t
Track width 207
Traction Control System, refer to DSC 94
Transmission 67, 68
Transporting children safely 61
Tread depth, tires 145
Trip odometer 76
Turn signal indicator 70
bulb replacement 176t
Turning circle 207
U
Uniform Tire Quality Grading
(UTQR) 146
Universal Transmitter 115
Used batteries, disposal 186t
Used oil, disposal 159t
V
Vacuum cleaner
power outlet 127t
socket 121t
Valve caps 148
Vanity mirror 54
Vehicle battery 185, 210
Vehicle care, interior 166
Vehicle Identification Number 161
Vehicle immobilizer 35
Vehicle removal from service 168
Vehicle storage 168
Ventilation 100, 104 , 111
draft-free 103, 111
in the rear 103, 111
while parked 114
Ventilation while parked
Vinyl care 166
Viscosity 158
Voice recognition 26, 27
refer also to the separate
Owner's Manual
W
Warm feet – cool head 103
Warning lamps 22
Warning messages 79t
Warning triangle 28Warnings
79
Warranty and Service Guide (Canadian models) 162
Washer fluid 156
Washer reservoir, filling 156t
Washer/wiper system 71
Washing your vehicle 163
Waxing, paintwork 165
Weights 208
Wheelbase 207
Wheels and tires 148, 150
Width 207
Windows 45
care 166t
convenience operation 36
remote control 38
Windshield cleaning 72
intensive cleaning
program 71
special wash program 71
Windshield washer filling reservoir 156t
nozzle adjustment 156t
Windshield wiper 71
blade replacement 174t
Winter driving 142
Winter operation 141
Winter tires 148, 149 Wiper blade
replacement 174t
Wipers 71
Work in the engine compartment 151t
X
Xenon lamps 176, 202
