traction control BMW X3 2.5I 2006 E83 Owner's Manual

Reference
At a glance
Controls
Driving tips
Mobility
49
Deactivating DSC
Press the button; the indicator lamp in the
instrument cluster lights up continuously.
DSC is now deactivated.
Stabilizing interventions of the chassis control
system DSC are no longer available. However,
the braking interventions that simulate the
function of the differential lock continue to be
active.
In the following exceptional circumstances, it
may be useful to switch off DSC for a short
period:
>When rocking the vehicle and starting off in
deep snow or on loose road surfaces
>On sandy road surfaces
>On poor surfaces with deep ruts
>If the wheels spin on muddy surfaces
>When driving with snow chains
As a result of the braking interventions,
the brakes may be subjected to additional
loads when the system is switched off. In order
to limit the brake temperature, brief automatic
suppression of the brake activation is possible.
To maintain vehicle stability, always drive with
the system switched on when possible.<
Reactivating DSC
Press the button again; the indicator lamp in the
instrument cluster goes out. DSC is now acti-
vated.
xDrive
xDrive is the all-wheel drive system of your X3.
The combined effects of xDrive and DSC fur-
ther optimize the traction and dynamic driving
characteristics. The all-wheel drive system
xDrive variably distributes the drive torque to
the front and rear axle depending on the driving
situation and prevailing road conditions.
HDC Hill Descent Control
The concept
HDC is a system for hill descent assistance that
reduces the speed on steep downward inclines
and makes it even easier to control the driving
characteristics of your BMW under these condi-
tions. The vehicle moves at slightly more than
walking speed without active intervention from
the driver.
HDC is available for activation at vehicle speeds
below approx. 20 mph/35 km/h. When driving
down steep hills with a speed below approx.
20 mph/35 km/h, the vehicle reduces speed
automatically down to slightly more than walk-
ing speed, approx. 5 mph/8 km/h, and then
maintains this speed at a constant.
You can use the accelerator or brakes to vary
this automatically controlled speed within a
range extending from approx. 3 mph/5 km/h to
15 mph/25 km/h.
You can specify a target speed within the same
range by using the +/– buttons of the cruise
control on the steering wheel.

Things to remember when driving
76
Things to remember when driving
Breaking-in
Moving parts should be allowed to adjust to one
another. To ensure that your vehicle provides
maximum economy throughout a long service
life, we request that you observe the following
instructions.
Engine and differential
Always obey all official speed limits.
For the first 1,200 miles/2,000 km
Drive at varying engine and driving speeds, but
do not exceed 4,500 rpm or 100 mph / 160 km/h
in the process.
Refrain from using full throttle and avoid press-
ing the accelerator beyond the kick-down point.
After 1,200 miles/2000 km
Engine and road speed can be gradually
increased.
Tires
Due to technical factors associated with their
manufacture, tires do not achieve their full trac-
tion potential until after an initial break-in
period. For this reason, drive with extra care
during the initial 200 miles/300 km.
Obey your local and state maximum speed lim-
its.
When the vehicle is operated on wet or
slushy roads, a wedge of water may form
between the tire and the road surface. This phe-
nomenon is referred to as hydroplaning and can
lead to partial or complete loss of traction, vehi-
cle control and braking effectiveness. Reduce
your speed on wet roads.<
Brake system
Your vehicle must travel approx. 300 miles/
500 km before the brake pads and rotors
achieve the optimal pad-surface and wear patterns required for trouble-free operation and
long service life later on.
To break in the separate handbrake drums,
apply the handbrake lightly when coasting to a
stop – at a traffic signal, for instance; use cau-
tion to avoid posing a danger to other road
users.
To avoid corrosion, repeat this procedure from
time to time.
The brake lamps do not come on when the
handbrake is applied.
Vacuum for the brake system servo unit
on your BMW is available only when the
engine is running. When you move the vehicle
with the engine off – e.g., by towing – substan-
tially higher levels of pedal force will be required
to brake the vehicle.<
Clutch
The function of the clutch reaches its optimal
level only after a distance driven of approx.
300 miles/500 km. During this break-in period,
engage the clutch gently.
Following component replacements
Follow the break-in sequence again if compo-
nents addressed above must be replaced due
to subsequent driving.
General driving notes
Close the liftgate
Operate the vehicle only when the liftgate
is completely closed; otherwise, exhaust
fumes could enter the interior of the vehicle.<
If special circumstances should make it abso-
lutely necessary to operate the vehicle with the
liftgate open:

Wheels and tires
88
Tire identification marks
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tire size
Speed code letter
Q = up to 105 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
Tire Identification Number
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
Tire age
The tire's date of manufacture is indicated on
the sidewall:
DOT ... 0506 indicates that a tire was manufac-
tured in week 5 of the year 2006.BMW recommends that you replace all tires
after 6 years at most, even if some tires may last
for 10 years.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width.
For example:
Tread wear 200 Traction AA
Temperature A
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one
and one-half (1γ) times as well on the govern-
ment course as a tire graded 100. The relative
performance of tires depends upon the actual
conditions of their use, however, and may devi-
ate significantly from the norm due to variations
in driving habits and service practices as well as
differences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are
AA, A, B, and C.
These grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test sur-
faces of asphalt and concrete. A tire marked C
may have poor traction performance.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction charac-
teristics.< e.g. 235/50 R 18 97 V
Nominal width in mm
Cross-sectional
relationship in Ξ
Radial tire code
Rim diameter in inches
Load rating,
not for ZR tires
Speed rating,
before R on ZR tires
e.g. DOT xxxx xxx 0506
Manufacturer code
for tire make
Tire size and tire design
Tire age

Reference
At a glance
Controls
Driving tips
Mobility
127
Tire replacement89
Tires
– age88
– breaking-in76
– changing89
– changing, refer to Wheel
changes103
– coding88
– condition89
– damage89
– DOT Quality Grades88
– flat103
– inflation pressure86
– inflation pressure table87
– size, refer to The right
wheels and tires90
– storage90
– temperature89
– traction88
– tread89
– tread wear88
– Uniform Tire Quality
Grading88
– wear indicators, refer to
Minimum tread depth89
– winter tires90
Tools, refer to Onboard tool
kit99
Torque
– engine114
– lug bolts105
Touch signaling39
Tow bar110
Tow fitting109
Towing109
– with automatic
transmission109
Towing eye109
Towing the vehicle109
Tow rope110
Tow sockets for tow
fitting109
Tow starting109
TPM Tire Pressure
Monitor52
Track width, refer to
Dimensions115
Traction88Traction aid, refer to DSC48
Traction control, refer to DSC
Dynamic Stability
Control48
Transmission
– automatic transmission with
Steptronic38
– manual transmission38
Transmission locking
mechanism, refer to
PPark38
Transmission malfunction,
refer to Malfunction39
Transporting children
safely33
Transport securing device,
refer to Securing cargo79
Traveling on poor roads80
Tread depth, refer to Minimum
tread depth89
Tread wear88
Tread wear indicator in tires,
refer to Minimum tread
depth89
Trip-distance counter, refer to
Trip odometer43
Trip odometer43
Trunk, refer to Cargo area70
Trunk lid, refer to Liftgate21
Turning circle, refer to
Dimensions115
Turn signals39
– indicator lamp12
– replacing bulbs101
– side, replacing bulbs101
U
Units45
– outside temperature45
Universal garage-door
opener, refer to Integrated
universal remote control65
Universal remote control65
Unlocking
– from inside20
– from outside19
– hood92Upholstery care, refer to
Caring for your vehicle
brochure
V
Valve screw caps, refer to
After mounting105
Vehicle
– battery105
– breaking-in76
– care, refer to Caring for your
vehicle brochure
– cargo loading78
– dimensions115
– disposal, refer to Caring for
your vehicle brochure
– locking from inside20
– locking from outside19
– parking37
– washing, refer to Caring for
your vehicle brochure
– weights116
Vehicle battery105
Vehicle jack103
– jacking points104
Vehicle Memory32
Ventilation61,64
– draft-free61,64
Viscosity95
Voice control, refer to
separate Owner's Manual
W
Warning and indicator
lamps12
Warning triangle107
Warranty, refer to Service and
Warranty Information
Booklet for US models,
Warranty and Service Guide
Booklet for Canadian
models97
Warranty and service7
Washer fluid41
Washer fluid reservoir,
capacity, refer to Filling
capacities116