98n
Tire Pressure Monitor RDC
*
Adaptive brake light
Flat tireIf there is a tire failure with a loss of
inflation pressure, the red indicator
lamp comes on or the message Ð TIRE
LOW/FLAT Ð appears in the Check
Control. In addition, an acoustic signal
sounds.
If this occurs, reduce vehicle speed
immediately and stop the vehicle in a
safe location. Avoid hard brake applica-
tions. Do not oversteer. Replace the flat
tire.
The spare tire which is available in
your vehicle as standard equip-
ment is equipped with the electronics
required for RDC and, following activa-
tion of the system, is also monitored
after it is mounted.<
RDC cannot alert you to severe
and sudden tire damage caused
by external factors.<
Have the tires changed at your
BMW Sports Activity Vehicle
center.
Your BMW Sports Activity Vehicle
center has the information needed for
working with RDC and is equipped with
the necessary special tools.<
System malfunctionDuring the period of the malfunction,
the yellow indicator lamp comes on or
the message Ð TIRECONTROL INAC-
TIVE Ð appears in the Check Control.
You will also see the same message
>in the event of a system malfunction
>if a wheel is mounted without the
RDC electronics
>if, in addition to the spare tire, addi-
tional wheels with RDC electronics
are on board
>after installation of one or several
wheels with an electronics system
still unknown to the system.
It takes a few minutes to learn the
new wheel electronics ID numbers
after system activation. Only then can
RDC detect and report a flat tire.
Please contact your BMW Sports
Activity Vehicle center for additional
information.The adaptive brake light provides
drivers of following vehicles with an
indication of the intensity with which
the brakes are being applied in your
own vehicle.
The display occurs in two stages:
>Normal braking:
The brake light units within the tail
lamps and the high-mount brake
lamp integrated within the rear
spoiler both light up with normal
intensity
>Hard braking or braking with ABS
active:
The tail lamps also come on, lighting
up with the same intensity as the
brake lamps to provide a more con-
spicuous warning.
134n
Information for your safety The factory-approved radial tires are
matched to the vehicle and have been
selected to provide optimum safety and
driving comfort on your vehicle when
used correctly.
It is not merely the tire's service life, but
also driving comfort and Ð above all else
Ð driving safety which depend on the
condition of the tires and the mainte-
nance of the specified tire pressure.
Incorrect inflation pressure is a
frequent cause of tire damage. It
also significantly influences the road-
holding ability of your BMW. Check tire
inflation pressures Ð including the spare
wheel Ð regularly, refer to page 26, at
least every two weeks and before
beginning a longer trip. If this is not
done, incorrect tire pressures can
cause driving instability and tire
damage, ultimately resulting in an
accident.<
Tire tread Ð Tire damage Inspect your tires frequently for tread
wear, signs of damage and for foreign
objects lodged in the tread. Check the
tread pattern depth.
Tread depth should not be allowed to
go below 0.12 in/3 mm, even though,
the legally specified minimum tread
depth, for example in Europe, is only
0.063 in/1.6 mm. Below a tread depth
of 0.12 in/3 mm there is an increased
risk of hydroplaning, even at relatively
moderate speeds and with only small
amounts of water on the road.
Tread wear indicators, refer to arrow,
are embedded around the tire circum-
ference in the base of the tire tread.
Their locations are indicated on the tire
sidewall with TWI Ð Tread Wear Indi-390de331
cator. At a tread depth of 0.063 in/
1.6 mm these indicators, signal that the
tires have reached the legally permis-
sible wear limit.
Do not drive on a deflated Ð flat Ð
tire. A flat tire greatly impairs
steering and braking response, and can
lead to complete loss of control over
the vehicle.
Avoid overloading the vehicle so that
the permitted load on the tires is not
exceeded. Overloading leads to over-
heating and causes damage inside the
tires. The ultimate result can assume
the form of a sudden air loss.
Unusual vibrations encountered during
normal vehicle operation, e.g. caused
by contact with curbs, etc., can indicate
a flat tire or some other vehicle mal-
function. This is also true for irregulari-
ties in the vehicle's handling character-
istics, such as a pronounced tendency
to pull to the left or right. Should this
occur, respond by immediately
reducing your speed.
Tire inflation pressures Tire condition
