2010 BMW M3 brake light

Reference
At a glance
Controls
Driving tips
Mobility
71
>When driving uphill on snow-covered roads,
in slush or on unplowed, snow-covered
roads
>When rocking a stuck vehicle free or start-
ing off in deep snow or on loose ground
>When driving with snow chains
Activating DTC
Press the button; the indicator lamps for DTC in
the instrument cluster come on.
For better control
If the indicator lamp flashes:
DTC is regulating the drive and brak-
ing forces.
If the indicator lamps are on:
DTC has been activated.
Deactivating DTC
Press the button again; the DTC indicator
lamps in the instrument cluster go out.
xDrive*
xDrive is your BMW's four-wheel-drive system.
The combined efforts of xDrive and DSC help to
further optimize traction and driving dynamics.
The xDrive four-wheel-drive system distributes
driving power variably to the front and rear axles
depending on the driving situation and road
conditions.
Hill Descent Control HDC*
HDC is a downhill driving assistant that controls
your speed on steep downhill gradients and
makes it even easier to control your BMW's
handling under these conditions. The vehicle then moves slightly faster than double walking
speed without the driver needing to intervene.
HDC can be activated as long as you are driving
under approx. 20 mph or 35 km/h. When driving
downhill at a speed of under approx. 20 mph or
35 km/h, the vehicle's speed is automatically
reduced to slightly more than double walking
speed and maintained.
Increasing or decreasing speed
By accelerating or braking you can change this
speed within a range from approx. 3 to 15 mph,
approx. 5 to 25 km/h.
You can specify a target speed within the same
range using the cruise control
* lever on the
steering column.
1To increase speed
2To decrease speed
Activating HDC
Press the button; the LED lights up.
When the vehicle is being braked automatically,
the LED flashes.
Deactivating HDC
Press the button again; the LED goes out.

Things to remember when driving
108 for a short period after the engine is switched
off.
Hydroplaning
When driving on wet or slushy roads,
reduce road speed. If you do not, a wedge
of water can form between tires and road sur-
face. This situation, known as hydroplaning,
means that the tire can completely lose contact
with the road surface, so that neither the car can
be steered nor the brake be properly applied.<
The risk of hydroplaning increases with declin-
ing tread depth on the tires, refer also to Mini-
mum tread depth on page133.
Driving through water
Drive through water on the road only if it is
not deeper than 1 ft/30 cm, and then only
at walking speed at the most. Otherwise, the
vehicle's engine, the electrical systems and the
transmission may be damaged.<
Use the parking brake on inclines
On inclines, do not hold the vehicle for a
lengthy period using the clutch; use the
parking brake instead. Otherwise, greater
clutch wear will result.<
For more information about the drive-off assis-
tant, refer to page72.
Braking safely
Your BMW is equipped with ABS as a standard
feature. Applying the brakes fully is the most
effective way of braking in situations in which
this is necessary. Since the vehicle maintains
steering responsiveness, you can still avoid
possible obstacles with a minimum of steering
effort.
Pulsation of the brake pedal, combined with
sounds from the hydraulic circuits, indicate that
ABS is in its active mode.
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pressure on the brake pedal
every few miles. Monitor traffic conditions to
ensure that this maneuver does not endanger other road users. The heat generated in this
process helps dry the pads and rotors to ensure
that full braking efficiency will then be available
when you need it.
Hills
To prevent overheating and the resulting
reduced efficiency of the brake system,
drive long or steep downhill gradients in the
gear in which the least braking is required. Even
light but consistent brake pressure can lead to
high temperatures, brake wear and possibly
even brake failure.<
You can increase the engine's braking effect by
shifting down, all the way to first gear if neces-
sary. This strategy helps you avoid placing
excessive loads on the brake system. Down-
shifting in manual mode of the automatic trans-
mission, refer to page49.
Never drive with the clutch held down,
with the transmission in neutral or with
the engine switched off; otherwise, engine
braking action will not be present or there will be
no power assistance to the brakes or steering.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
pedals; otherwise, pedal function could be
impaired.<
Corrosion on brake rotors
When the vehicle is driven only occasionally,
during extended periods when the vehicle is not
used at all, and in operating conditions where
brake applications are less frequent, there is an
increased tendency for corrosion to form on
rotors, while contaminants accumulate on the
brake pads. This occurs because the minimum
pressure which must be exerted by the pads
during brake applications to clean the rotors is
not reached.
Should corrosion form on the brake rotors, the
brakes will tend to respond with a pulsating
effect that even extended application will fail to
cure.

Care
144 water penetration. Follow the operating instruc-
tions of the high-pressure washer.<
When using high-pressure washers, do
not spray against the sensors and cam-
eras, e.g. of the Park Distance Control or Rear
View Camera, for an extended period and main-
tain a distance of at least 1 ft/30 cm.<
Manual car wash
When washing the vehicle by hand, use large
quantities of water and car shampoo if neces-
sary. Clean the vehicle with a sponge or wash-
ing brush, applying light pressure only.
Before cleaning the windshield, deacti-
vate the rain sensor or switch off the igni-
tion to prevent unintentional activation of the
wipers.<
Observe local regulations pertaining to
washing vehicles by hand.<
Headlamps
Do not rub them dry and do not use abrasive or
corrosive cleaning agents.
Loosen dirt, e.g. insects, with shampoo or
insect remover and wash away with copious
quantities of water.
Thaw ice with a windshield deicer and do not
use an ice scraper.
Windows
Clean the inside and outside surfaces of the
windows and the mirrors with window cleaner.
Do not clean the mirrors with cleaners
containing quartz.<
Paintwork care
Regular care contributes to value retention and
protects the paintwork against the long-term
effects of damaging substances.
Region-specific environmental influences can
damage the vehicle paintwork. Therefore, it is
important to adapt the frequency and scope of
car care accordingly.
Immediately remove aggressive materials such
as spilled fuel, oil, grease, brake fluid, tree sap or bird droppings to prevent damage to the paint-
work.
Repairing paintwork damage
Immediately repair scratches or similar
damage, such as that caused by stones
hitting the vehicle, where necessary to prevent
rusting.<
BMW recommends having paintwork damage
repaired by a professional paint repair work-
shop according to BMW specifications using
original BMW paint materials.
Preservation
A preservation treatment is necessary when
water no longer beads off the clean paintwork
surface. Only use products for paintwork pres-
ervation that contain carnauba or synthetic
waxes.
Rubber seals
Treat only with water or rubber care products.
Do not use silicon-containing care prod-
ucts on rubber seals; otherwise, noise
and damage could occur.<
Chrome parts
Carefully clean vehicle parts such as the radia-
tor grill, door handles or window frames with
copious quantities of water and a shampoo
additive, especially when roads are treated with
deicing salt. For additional treatment, use a
chrome polish.
Light-alloy wheels
For technical reasons, dust is generated during
braking that is deposited on the light-alloy
wheels. Remove the dust regularly using acid-
free rim cleaner.
Do not use aggressive, acidic, strongly
alkaline and abrasive cleaning agents or
steam jets over 1407/606; otherwise, dam-
age may occur.<

Indicator and warning lamps
160
Indicator and warning lamps
Indicator and warning lamps can light up in a
variety of combinations and colors. See the
table for information on causes and how to
react. Note whether a lamp comes on alone or in
combination with another. Some lamps can
light up in different colors. Corresponding dis-
tinctions are made in the text.
12Cause What to do
Turn signals
High beams/headlamp flasher
switched on
Fog lamps switched on
Fasten safety belts Fasten your safety belt, refer also to
page39.
Indication in US models
Parking brake applied Release the parking brake.
Indication in Canadian models
Parking brake applied Release the parking brake.
Outside temperature warning Drive cautiously, refer also to page61.
Lights up briefly:
Gasoline engine: approx. 2.1 US gal-
lons/8 liters of fuel remain in the tank
Diesel engine: approx. 1.7 US gallons/
6.5 liters of fuel remain in the tank
Remains on:
Remaining operating range is no more
than 30 miles/50 km, refer to page62
Engine refuses to start Depress the brake or clutch in order to
start the engine, refer to page47.
Ignition switched on and driver's door
openSwitch off the ignition, refer to page46,
or close the driver's door.
Parking lamps still on Switch off the parking lamps, refer to
page79.

Reference
At a glance
Controls
Driving tips
Mobility
161
Roadside parking lamps still on Switch off the roadside parking lamps,
refer to page81.
Preheat, refer to page47
Door open
Engine compartment lid open
Trunk lid/tailgate or rear window open
Gas cap is open Make sure that the gas cap is correctly
positioned and close it until it audibly
clicks. Do not jam the strap between the
gas cap and the vehicle.
Windshield washer fluid level too low Add washer fluid as soon as possible,
refer to page52.
Lights up in red:
Service due Arrange a service appointment.
Check service requirements, refer to
page65.
Lights up in yellow:
The engine will start the next time the
start/stop button is touched, possibly
without the brake or clutch being
depressed
Remote control malfunctioning or, in
cars with Comfort Access, not
detectedThe engine cannot be started. Have the
remote control checked, if necessary.
Battery in remote control discharged Use the remote control for a longer jour-
ney or, in cars with Comfort Access,
replace the battery.
Belt tensioners and/or airbag system
failedHave the system checked immediately.
Active steering defective You can continue your journey.
Steering characteristics are modified
and steering wheel could be off-center.
Steer carefully.
Have the system checked as soon as
possible.
12Cause What to do

Reference
At a glance
Controls
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Mobility
163
Lights up in red:
Engine overheating Carefully bring the car to a stop, switch
off the engine and allow it to cool down.
Do not open the hood; otherwise, there
is a risk of injury from scalding. Contact
your BMW center.
Lights up in yellow:
Engine too hot Continue driving at more moderate
speed so that the engine can cool
down. Have the engine checked with-
out delay if the situation reoccurs.
Lights up in red:
Battery is no longer being charged.
Alternator malfunctionSwitch off all unnecessary electrical
consumers. Have the power supply
system checked without delay.
Lights up in yellow:
Battery charge level very low, battery
aged or not securely connectedHave the battery checked as soon as
possible.
Indication in US models
Parking brake applied
Indication in Canadian models
Parking brake applied
Indication in US models
Lights up in red:
Brake fluid level too low Reduced braking effect, stop the car
carefully. Contact your BMW center.
Lights up in yellow:
Drive-off assistant has failed. The car
will not be held in place after the brake
is releasedHave the system checked as soon as
possible.
Indication in Canadian models
Lights up in red:
Brake fluid level too low Reduced braking effect, stop the car
carefully. Contact your BMW center.
Lights up in yellow:
Drive-off assistant has failed. The car
will not be held in place after the brake
is releasedHave the system checked as soon as
possible.
12Cause What to do

Indicator and warning lamps
164Indication in US models
Brake pads worn Have the condition of the brake pads
checked without delay.
Indication in Canadian models
Brake pads worn Have the condition of the brake pads
checked without delay.
Lights up in red: Have the system in question checked
without delay.
>Starter failed or The engine cannot be restarted.
>Ignition malfunctioning. Engine
restart only possible when brake is
depressed or
>Lighting system failed. Low beams/
tail lamps and brake lamps still
operational. All other lamps failedDepress the brake to restart the engine.
Lights up in yellow:
>Control of the brake lamps failed or
>fuel supply malfunctioning You can continue your journey, but
moderate your speed and exercise due
caution. Have the system in question
checked without delay.
Flashing:
Dynamic Stability Control DSC or
Dynamic Traction Control DTC is con-
trolling drive and braking forces, refer
also to page71
Dynamic Traction Control DTC acti-
vated, refer also to page71
Dynamic Stability Control DSC and
Dynamic Traction Control DTC deacti-
vated, refer also to page71Driving stability limited during accelera-
tion and cornering.
Driving style must be readjusted.
Suspension control system failed, refer
also to page70Driving stability limited during accelera-
tion and cornering.
You can continue your journey, but
moderate your speed and exercise due
caution. Have the system checked as
soon as possible.
xDrive has failed, refer also to page72You can continue your journey. Drive
cautiously and think well ahead. Avoid
driving on rough tracks, full-throttle
operation and use of the transmission's
kickdown mode. Have the system
checked immediately.
12Cause What to do

Reference
At a glance
Controls
Driving tips
Mobility
167
Vehicles with Tire Pressure Monitor*
Light up in yellow:
Tire Pressure Monitor not initialized Check the inflation pressure and reset
the system, refer to page74
The small lamp flashes in yellow and
then lights up continuously; the larger
lamp comes on in yellow:
>Tire Pressure Monitor has failed.
Punctures are not indicatedHave the system checked.
>A wheel without TPM electronics
has been mountedHave the system checked.
>Interference from systems or
devices that use the same radio fre-
quency. The system automatically
reactivates once it is outside of the
field of interference
Lights up in red:
>Transmission limp-home program
active with restricted range of
gears, possibly with reduced accel-
eration.You can continue your journey, but
moderate your speed and exercise due
caution. Have the system checked
without delay.
Gears can be engaged without
depressing the brakeAlways depress the brake to engage a
gear.
Lights up in yellow:
>Automatic selector lever locked:
Selector lever locked in position P
with engine running or ignition
switched on and brake depressedOverriding selector lever lock, refer to
page50.
>Brake signal malfunctioning: gear
can be engaged without depress-
ing the brakeTo engage a gear while the vehicle is at
a standstill, always step on the brake.
Before leaving the vehicle, engage P
and switch off the engine.
12Cause What to do