2012 BMW M3 brakes

63
Driving
Controls
Switching off the engine
Always take the remo
te control with you
when you leave the vehicle.
When parking, apply the parking brake force-
fully; otherwise, the vehicle could begin to roll. <
Manual transmission
1.With the car at a standstill, press the Start/
Stop button.
2. Shift into first gear or reverse.
3. Forcefully apply the parking brake.
4. Removing the remote co ntrol from the igni-
tion lock, refer to page 61.
Automatic transmission
1. With the car at a stan dstill, move the selec-
tor lever to position P.
2. Press the Start/Stop button.
3. Forcefully apply the parking brake.
4. Removing the remote co ntrol from the igni-
tion lock, refer to page 61.
Sport automatic transmission with
double clutch
1. With the car at a standstill, press the Start/
Stop button.
If the transmission is shifted into N when the
engine is switched off, you will be notified
visually and acoustically of this fact.
2. Forcefully apply the parking brake.
3. Remove remote contro l from the ignition
lock, refer to page 61. The transmission is
automatically shifted into transmission
position P.
Parking brake
The parking brake is primarily intended to pre-
vent the vehicle from rolling while parked; it
brakes the rear wheels.
Indicator lamp
The indicator lamp is lit, and when you
drive off an acoustic signal sounds in
addition. The parking brake is still
applied.
Indicator lamp for Canadian models.
Applying
The lever locks in po sition automatically.
Releasing
Pull slightly upwards, press the button and
lower the lever.
In exceptional cases, if the parking brake
has to be used to slow or stop the car, do
not pull the lever up too hard. In doing so, con-
tinuously press the button of the parking brake
lever.
Otherwise, excessive force on the parking
brake can lock up the rear wheels and cause the
rear of the car to swerve. <
To prevent corrosion and one-sided brak-
ing action, occasionally apply the parking
brake lightly when the vehicle is slowly coming
to a stop if the traffic conditions are suitable.
The brake lamps do not light up when the park-
ing brake is applied. <
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Driving
Controls
All washer nozzles are
supplied with washer
fluid by the same reservoir.
Fill with water and, if required, with a washer
antifreeze, according to manufacturer's recom-
mendations.
Mix the water and antifreeze before filling
the washer fluid reservoir to make sure
the correct concentration is maintained. <
Capacity
Approx. 6.3 US quarts/6 liters.
Cruise control
The concept
Cruise control is available for use at speeds of
approx. 20 mph or 30 km/h. The car then stores
and maintains the speed that you specify using
the lever on the steering column. In order to
maintain the specifie d speed, the system
brakes the vehicle when the engine braking
effect is insufficient on downhill gradients.
Do not use cruise control when driving at
constant speed is prevented by adverse
conditions, e.g. winding roads, dense traffic or
poor road conditions due to, e.g., snow, rain, ice
or loose surfaces. Otherwise, you could lose
control of the vehicle and cause an accident as a
result. <
Manual transmission
You can shift gears while cruise control is acti-
vated. The system is deactivated when you drive at very low engine speeds for an extended
period.
One lever for all functions
1
Storing and maintainin g speed or accelerat-
ing
2 Storing and maintaining speed or deceler-
ating
3 Deactivating cr uise control
4 Resuming a previously stored speed
Maintaining current speed
Briefly press the lever, arrow 1, or pull it briefly,
arrow 2.
The car's current speed is stored and main-
tained. It is displayed on the speedometer and
briefly in the instrument cluster.
On uphill gradients, it may prove impossible to
maintain the set speed if current engine power
output is insufficient. If the engine braking
effect is insufficient on downhill slopes, the sys-
tem will brake the vehicle slightly.
Increasing desired speed
Repeatedly press the lever to the resistance
point or beyond, arrow 1, until the desired
speed is reached.
> Each time the lever is pressed to the resis-
tance point, the desired speed is increased
by approx. 1 mph or 1 km/h.
> Each time the lever is pressed beyond the
resistance point, the desired speed is
increased by up to 5 mph or 10 km/h.
The system stores and maintains the speed.
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74
ControlsDriving
Accelerating using the lever
Accelerating slightly:
Press the lever to the resistance point, arrow 1,
until the desired speed is reached.
Accelerating significantly:
Press the lever beyond the resistance point,
arrow 1, until the desired speed is reached.
The vehicle accelerates without pressure on
the accelerator pedal. The system stores and
maintains the speed.
Decreasing speed
Repeatedly pull the lever to the resistance point
or beyond, arrow 2, until the desired speed is
displayed.
> Each time the lever is pulled to the resis-
tance point, the desired speed is decreased
by approx. 1 mph or 1 km/h.
> Each time the lever is pulled beyond the
resistance point, the desired speed is
reduced by up to 5 mph o r 10 km/h until the
minimum speed of 20 mph or 30 km/h is
achieved.
The system stores and maintains the speed.
Deactivating cruise control
Briefly press the lever upwards or downwards,
arrow 3.
The displays on the speedometer disappear.
In addition, the system is automatically deacti-
vated:
> When the brakes are applied.
> When the manual transmission is shifted
very slowly or shifted into neutral.
> When the automatic transmission selector
lever is moved into the neutral position.
> When the selector lever of the Sports auto-
matic transmission with double clutch is
moved into the neutral position.
> When DTC is activate d or DSC is deacti-
vated.
> When DSC or ABS is intervening. Cruise control is not deactivated by depressing
the accelerator pedal.
Once the accelerator
pedal is released, the st ored speed is achieved
again and maintained.
Warning lamp
The warning lamp lights up when
cruise control is deactivated due to
control intervention by the DSC, for
example. A message appears on the Control
Display.
Resuming a previously stored speed
Press the button, arrow 4.
The last stored speed is resumed and main-
tained.
In the following instance s, the stored speed is
deleted and can no longer be resumed:
> When driving stability control systems are
intervening.
> In cars with manual transmission: when you
shift gears very slowly or shift to neutral.
> In cars with automatic transmission: when
you engage selector lever position N.
> In cars with Sport automatic transmission
with double clutch: when you engage selec-
tor lever position N.
> When the ignition is switched off.
Displays in the instrument cluster
1Stored speed
2 Selected speed is displayed briefly
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75
Driving
Controls
If --- mph or --- km/h temporarily appears
in the instrument cluster display, it is pos-
sible that the system prerequisites for operation
are currently not met.
Calling up Check Control messages, refer to
page 93.<
Malfunction
The warning lamp lights up. A mes-
sage appears on th e Control Display.
The cruise control is malfunctioning.
You can continue your journey. Have the sys-
tem checked.
Active Cruise Control
The concept
With Active Cruise Cont rol, you can select a
desired speed which is not only automatically
maintained when driving on open roadways, but
also varied to maintain a selected distance set-
ting as slower traffic is encountered.
Active Cruise Control is a technological
advance over the familiar cruise control and is a
welcome relief from the constant adjustment of
speed that can accompany driving in traffic on
highways or other high -speed thoroughfares.
Especially on longer trips, the system can
reduce fatigue and tension, while increasing
your enjoyment of driving. Please use it safely
and responsibly.
Within the limits of its capability, the system
automatically adap ts the car's speed to that of a
slower vehicle in front of you. You can specify
the distance to be main tained from the vehicle
in front in four stages. For safety reasons, the
distance is speed-dependent. Based on your
selected distance setti ng, the system automat-
ically decreases the thro ttle setting and lightly
applies the brakes if necessary. The vehicle
brake lamps will automatically illuminate to sig-
nal a following driver to take action. In addition,
it may be necessary for the vehicle or the driver
to downshift, depending on the kind of trans- mission your vehicle is equipped with, to main-
tain the distance setting
selected. If the vehicle
ahead speeds up or when the lane ahead
becomes clear, your vehi cle will accelerate to
the speed you have selected by increasing the
throttle setting and shifting gears automatically
or by the driver as needed. Your selected speed
will be held when driving downhill, too.
Since this Active Cruise Control system is a
new technology and operates differently from
conventional cruise co ntrol systems which you
may be accustomed to, you are strongly urged
to read all of the pages relating to this system
before use. Pay special attention to the System
limitations section beginning on page 80.
Braking sensation
>If you step on the brake pedal while the sys-
tem is braking, peda l sensation will be
slightly different from the usual.
> Possible noises during automatic braking
are normal.
Manual transmission
You can shift gears while cruise control is acti-
vated. The system is deactivated when you
drive at very low engine speeds for an extended
period.
Range of applications
The minimum desired speed is 20 mph or
30 km/h, the maximum desired speed is
110 mph or 180 km/h.
As with conventional cruise control sys-
tems, Active Cruise Control in no way
diminishes or substitutes for the driver’s own
personal responsibility, alertness and aware-
ness in adjusting speed, braking or otherwise
controlling the vehicle. The driver should
decide when to use the system on the basis of
road, traffic, visibility, and weather conditions.
Active Cruise Control is intended for use on
highway-type roadways where traffic is moving
relatively smoothly. Do not use this system in
city driving; heavy traffic such as during rush
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76
ControlsDriving
hour; on curvy, winding ro ads, slippery roads or
roads with sharp curves such as highway off-
ramps; during inclement weather such as snow,
strong rain or fog; or when entering inter-
changes, service/parkin g areas or toll booths.
It is also important to regulate your vehicle's
speed and distance setting within applicable
legal limits. Always be ready to take action or
apply the brakes if necessary, especially when
the system is actively fo llowing a vehicle in front
of you. Otherwise, driving situations could
result that pose the risk of accidents. <
One lever for all functions
1Store and increase desired speed
2 Store and decrease desired speed
3 Deactivate system, refer to page 77
4 Resume stored desired speed and dis-
tance, refer to page 78
5 Select distance to vehicle driving ahead,
refer to page 77
Storing current speed
Briefly press the lever, arrow 1, or pull the lever,
arrow 2, at a driving speed of more than approx.
20 mph or 30 km/h. The car's current speed is stored. It is displayed
on the speedometer and briefly in the instru-
ment cluster.
Increasing desired speed
Press or briefly press the lever to the resistance
point or beyond, arrow
1, until the desired
speed is displayed.
> Each time the lever is briefly pressed to the
resistance point, the desired speed is
increased by approx. 1 mph or 1 km/h.
> Each time the lever is briefly pressed
beyond the resistance point, the desired
speed is increased by up to 5 mph or
10 km/h until the maximum speed of
110 mph or 180 km/h is achieved.
The speed then displayed is stored and
achieved on a clear road.
Decreasing de sired speed
Pull the lever, arrow 2, until the desired speed is
displayed.
The other functions work analogously to those
described under Increasing desired speed.
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Driving
Controls
Selecting distance
>
Press downward:
Increase distance.
> Press upward:
Decrease distance.
The selected distance is displayed in the instru-
ment cluster.
Use good judgment to select the appro-
priate following distance given road con-
ditions, traffic, applicable laws and driving rec-
ommendations for safe following distance.
Otherwise, an accident risk could result.<
Deactivating cruise control
Press the lever upward or downward, arrow 3.
The displays on the speedometer disappear.
In addition, the system is automatically deacti-
vated:
> When the brakes are applied.
> The speed is reduced to below 20 mph or
30 km/h due to a traffic situation.
> When the manual transmission is shifted
very slowly or shifted into neutral.
> When the automatic transmission selector
lever is moved into the neutral position.
> When the selector lever of the Sports auto-
matic transmission with double clutch is
moved into the neutral position.
> When Dynamic Traction Control DTC is
activated.
> When Dynamic Stability Control DSC is
deactivated.
> When DSC or ABS is intervening.
> The system does not recognize any objects
for a longer time, e. g. on infrequently trav-
eled roads without a shoulder or guard rails,
or if the radar sensor is covered with dirt,
refer to page 78.
> The parking brake is engaged.
When the system is deactivated, you
must brake the vehicle yourself and/or
maneuver as necessary; otherwise, there is a
risk of accidents. <
Distance 1
Distance 2
Distance 3
Distance 4
This is always the preset dis-
tance when you use the system
for the first time after starting the
engine.
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ControlsDriving
System limitations
Always remember that the range and abil-
ity of the system does have physical limi-
tations. It will not apply the brakes or decelerate
your vehicle when there is a slow-moving vehi-
cle, stopped vehicle, or stationary object ahead
of you, for example at a traffic light or when
approaching a parked vehicle. Also, the system
does not react to oncoming traffic, pedestrians
or other types of potentia l traffic such as a rider
on horseback. The system may also not detect
smaller moving objects such as motorcycles or
bicycles. Be especially alert when encountering
any of these situations as the system will nei-
ther automatically brake, nor provide a warning
to you. Also, be aware that every decrease in
the distance setting allows your vehicle to come
closer to a vehicle in front of you and requires a
heightened amount of alertness. <
Active Cruise Control is not and must not
be used as a collisio n avoidance/warning
system. <
If while your vehicle is actively following a vehi-
cle in front of you and the vehicle ahead speeds
up or the lane ahead becomes clear, then your
vehicle will accelerate to the speed you have
selected. Be aware that changing to a clear,
unobstructed lane will also result in your vehicle
accelerating.
Be certain to deactiva te the system when
you pull into an exit lane for a highway off-
ramp. < Also, vehicles travelin
g in a staggered manner
on a highway may cause a delay in the system's
reaction to a vehicle in front of you or may cause
the system to react to a vehicle actually in the
lane next to you. Always be ready to take action
or apply the brakes if necessary.
While Active Cruise Co ntrol is capable of
braking your vehicle automatically when
you approach a slower vehicle ahead, it is
important to be aware that the ability of the sys-
tem to apply the brakes is also limited, e.g.
when you reduce your desired speed sharply.
The system cannot stop your vehicle. It uses
only a portion of braking system capacity and
does not utilize the full ca pacity of the vehicle
braking system. Therefore, the system cannot
decrease your speed for large differences in
speed between your vehicle and the vehicle
ahead. Examples: when you approach a vehicle
traveling at a much lower speed than your own
speed such as approaching a toll booth or when
a much slower vehicle cuts in front of you at
close range. <
Active Cruise Control ca n only decelerate the
vehicle to approx. 20 mph or 30 km/h.
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97
Technology for driving comfort and safety
Controls
Malfunction
The warning lamp lights up. A mes-
sage appears on th
e Control Display.
PDC is malfunctioning. Have the sys-
tem checked.
To avoid this problem, keep the sensors clean
and free of ice or snow in order to ensure that
they will continue to op erate effectively. When
using a high-pressure cleaner, do not spray the
sensors for extended periods of time and only
from a distance of at least 1 ft/30 cm.
Manual operation
The LED above the button also flashes.
PDC with visual warning
The approach of the vehicle to an object is
shown on the Control Display. Objects that are
farther away are displayed on the Control Dis-
play before a signal to ne sounds. The display
appears on the Control Display as soon as PDC
is activated.
System limitations
Even with PDC, final responsibility for
estimating the distance between the
vehicle and any obstructions always remains
with the driver. Even when sensors are pro-
vided, there is a blind spot in which objects can
no longer be detected. The system is also sub-
ject to the physical limit s that apply to all forms
of ultrasonic measurement, such as those
encountered with traile r towbars and hitches,
thin or wedge-shaped objects, etc. Low objects
that have already been displayed, e.g. curbs,
can disappear again from the detection area of
the sensors before or after a continuous tone
sounds. Higher, protruding objects, e.g. ledges,
cannot be detected. Therefore, always drive
cautiously; otherwise, there is a risk of personal
injury or property damage.
Loud sound sources outside or inside the car
can drown out the PDC signal. Therefore,
always drive cautiously; otherwise, there is a
risk of personal injury or property damage. <
Driving stability control
systems
Your BMW has a number of systems that help
to maintain the vehicle's stability even in
adverse driving conditions.
ABS Antilock Brake System
ABS prevents locking of the wheels during
braking. Safe steering response is maintained
even during full braking. Active safety is thus
increased.
The ABS is operational every time you start the
engine. Braking safely, refer to page140.
Electronic brake-force distribution
EBV
The system controls the brake pressure in the
rear wheels to ensure stable braking behavior.
Dynamic Brake Control DBC
When you apply the brakes rapidly, this system
automatically produces the maximum braking
force boost and thus helps to achieve the short-
est possible braking distance during full brak-
ing. This system exploits all of the benefits pro-
vided by ABS.
Do not reduce the pressu re on the brake for the
duration of the full braking application.
Dynamic Stability Control DSC
DSC prevents the driving wheels from losing
traction when you pull aw ay from rest or accel-
erate. The system also recognizes unstable
driving conditions, for example if the rear of the
car is about to swerve or if momentum is acting
at an angle past the front wheels. In these
cases, DSC helps the vehicle maintain a safe
course within physical limits by reducing engine
output and through brakin g actions at the indi-
vidual wheels.
The laws of physics cannot be repealed,
even with DSC. An appropriate driving
style always remains th e responsibility of the
driver. Therefore, do not reduce the additional
Online Edition for Part no. 01 40 2 609 333 - \251 08/11 BMW AG