Page 124 of 201

124n
Winter operation Rubber seals and components In order to prevent the weather-strip-
ping from freezing, apply BMW rubber
treatment or silicone spray to the seals
on the doors, hood and tailgate.
A full range of car care products is
available from your BMW center.< Snow chains Mount BMW snow chains
* only on tire
size 235/65 R 17. Always mount chains
in pairs and on the rear wheels only.
Read and comply with the chain manu-
facturer's safety precautions. Do not
exceed a maximum speed of 30 mph
(50 km/h).
Starting offWhen starting in deep snow or "rock-
ing" the vehicle free, it may be advis-
able to deactivate the DSC system
briefly. Refer to page 83.
Driving on low-traction road
surfaces Use smooth, gentle pressure to control
the accelerator pedal and avoid exces-
sive engine speeds. Maintain an ade-
quate distance between yourself and
the car ahead. BrakingWinter road conditions substantially re-
duce the amount of traction available
between the tires and the road surface.
The resulting increases in braking dis-
tance are considerable and should be
kept in mind at all times.
ABS is intended to prevent the wheels
from locking during brake applications,
thus helping to maintain vehicle stability
and steering response. If the ABS does not respond in a critical
braking situation and the wheels lock:
Reduce the pressure on the brake
pedal until the wheels just start to roll
again while still maintaining enough
force to continue braking. Following
that, increase pedal pressure again.
Reduce the pressure as the wheels
lock, then reapply pressure. Repeat this
braking sequence.
This type of staggered braking will re-
duce the braking distance, and the ve-
hicle still remains responsive to steer-
ing.
You can then attempt to steer around
hazards after you have reduced pres-
sure on the brake pedal.
Do not shift down on slick road
surfaces if you want to decelerate.
Doing so could cause the wheels to
lose traction and skid, thus resulting in
the loss of vehicle control.<
Page 130 of 201

130n
Wheel and tire combinations The right choice Use only tires approved by BMW. Refer
to page 132.
Due to the high speeds this vehicle can
reach, the use of specific brands, spec-
ifications and sizes is mandatory. Con-
sult any BMW center for details.
Comply with all local/national regula-
tions.
The correct wheel-tire combina-
tion affects different systems such
as ABS, ATC and DSC. The function of
these systems is impaired if improper
wheel-tire combinations are used.
For this reason, use only tires of the
same brand and tread pattern. If you
have mounted winter tires and must use
the spare wheel following a flat tire, for
example, remount the approved wheel-
tire combination as soon as possible.<
Codes on the tires and wheels The tire codes will aid you in selecting
the correct tire.
Codes on radial tires:
The speed rating indicates the ap-
proved maximum speed for the tire.
Summer tires:
S = up to 112 mph (180 km/h)
T = up to 118 mph (190 km/h)
H = up to 130 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)
ZR= over 150 mph (240 km/h) Example:
Nominal width
in mm
Aspect ratio in X
Belt rating code for
radial tires
Rim diameter in inches
Load rating
Speed rating
235/65 R 17 104 H
All-Season, All-Terrain and Winter tires:
Q M+S = up to 100 mph (160 km/h)
T M+S = up to 118 mph (190 km/h)
H M+S = up to 130 mph (210 km/h)
Codes stamped on light-alloy wheels:
Protect valve stems from dirt by using
screw-on valve stem caps. Dirt in the
valves frequently leads to slow leaks. Rim width
in inches
Code letter for
flange type
Symbol for full-drop
center rim
Rim diameter in inches
Special Extended Hump
on the 2 rim shoulders
7.5 x 17 SEH 2
J
Page 132 of 201

132n
Approved wheel and tire specifications Observe the specifications for tires and
wheels in the vehicle's manuals. If sizes
not approved by the manufacturer are
mounted, an entry in the vehicle's doc-
uments may be necessary. Snow chains
*
It is only possible to mount snow chains
on the rear wheels with tire size
235/65 R 17. Tire specifications Light-alloy wheels
BMW X5 4.4i
All-Season/All-Terrain
235/65 R 17 104 H M+S 7.5J x 17 SEH2
255/55 R 18 105 H M+S 8.5J x 18 EH2
Summer
255/55 R 18 105 V 8.5J x 18 EH2
Front: 255/50 R 19 103 V
Rear: 285/45 R 19 107 V9J x 19 EH2
10J x 19 EH2
Winter
235/65 R 17 104 Q/T/H M+S 7.5J x 17 SEH2
The use of rims and lug bolts that
do not meet the specifications of
the original factory-installed equipment
will affect the safe operation of your ve-
hicle and may cause an accident and
personal injury.
Never mix tires of different design, such
as steel-belted radials with radial bias
belted or bias-ply tires, etc. Mixing tire
types will adversely affect roadholding
and can lead to loss of vehicle con-
trol.<