wheel BMW 640I COUPE 2014 Service Manual

Indicator/warning lamps
When DTC is activated, TRACTION is dis‐
played in the tachometer.
The indicator lamp lights up: DTC Dy‐
namic Traction Control is activated.
xDrive xDrive is the all-wheel-drive system of your ve‐
hicle. Concerted action by the xDrive and DSC
further optimize traction and driving dynamics.
The xDrive all-wheel-drive system variably dis‐
tributes the drive forces to the front and rear
axles as demanded by the driving situation and
road surface.
HDC Hill Descent Control
The concept HDC is a downhill driving assistant that auto‐
matically controls vehicle speed on steep
downhill gradients. Without applying the
brakes, the vehicle moves at slightly more than
walking speed.
Hill Descent Control can be activated at
speeds below approx. 22 mph/35 km/h. When
driving downhill, the vehicle reduces its speed
to approx. walking speed and then keeps its
speed constant.
As long as there is active braking, the system
is on standby. The system does not brake the
vehicle during this time.
Use HDC in low gears or in transmission posi‐
tion D or R only.
Increasing or decreasing vehicle
speed
Specify desired speed in the range from ap‐
prox. 4 mph/6 km/h to approx. 15 mph/25 km/h
using the rocker switch of the cruise control on
the steering wheel. Vehicle speed can be
changed by lightly accelerating.▷Press up the rocker switch to the point of
resistance: the speed increases gradually.▷Press up the rocker switch past the point
of resistance: the speed increases while
the rocker switch is pressed.▷Press down the rocker switch to the point
of resistance: the speed decreases gradu‐
ally.▷Press down the rocker switch past the
point of resistance: when driving forward,
the speed decreases to approx.
6 mph/10 km/h; when reversing, the speed
decreases to approx. 4 mph/6 km/h.
Activating HDC
Press the button; the LED above the but‐
ton lights up.
Deactivating HDC Press the button again and the LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h.
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Display in the instrument clusterThe selected speed is displayed
in the speedometer.▷Green: the system is actively
braking the vehicle.▷Orange: the system is on
standby.
Malfunction
A message is displayed in the instrument clus‐
ter. HDC is not available, e.g., due to elevated
brake temperatures.
Adaptive Drive
The concept Adaptive Drive includes the following systems:
▷Dynamic Drive, refer to page 119.▷Dynamic Damping Control, refer to
page 119.
The system increases driving stability and driv‐
ing comfort.
Dynamic Drive The conceptDynamic Drive reduces the lateral inclination of
the vehicle that occurs during rapid driving in
curves or during quick evasive maneuvers.
Driving stability and driving comfort are in‐
creased under all driving conditions. The sys‐
tem utilizes active stabilizer bars on the front
and rear axles that react immediately to all driv‐
ing situations.
Programs The system offers two different programs.
The programs can be selected via the Driving
Dynamics Control, refer to page 120.
SPORT
Sporty tuning for greater driving agility.
COMFORT
Comfort-oriented tuning for optimal comfort.
Dynamic Damping Control
The concept This system reduces undesirable vehicle mo‐
tion when using a dynamic driving style or trav‐
eling on uneven road surfaces.
The system enhances driving dynamics and
comfort as required for the road surface and
driving style.
Programs The system offers several different programs.
The programs can be selected via the Driving
Dynamics Control, refer to page 120.
SPORT/SPORT+
Consistently sporty control of the shock ab‐
sorbers for greater driving agility.
COMFORT/ECO PRO Balanced tuning between the COMFORT+ and
SPORT/SPORT+ programs.
COMFORT+
Comfort-oriented tuning of the shock absorb‐
ers for optimal traveling comfort.
Integral Active Steering The conceptIntegral Active Steering is a combination of Ac‐
tive Steering and rear axle steering.
Active Steering varies the steering angle of the
wheels in relation to the steering wheel move‐
ment as a function of the speed.Seite 119Driving stability control systemsControls119
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At speeds up to approx. 37 mph/60 km/h, e.g.,
in curves, the steering angle is increased, i.e.,
steering becomes more direct.
The rear axle steering acts to increase maneu‐
verability by turning the rear wheels slightly in
a direction opposite to the front wheels.
At higher speeds, the steering angle is increas‐
ingly reduced.
The rear wheels are turned to the same angle
as the front wheels.
In critical situations, Integral Active Steering
can specifically steer the front and rear wheels
to stabilize the vehicle before the driver inter‐
venes, e.g., when braking where road condi‐
tions differ on the left and right sides of the ve‐
hicle.
InitializingIn rare cases, it may become necessary to initi‐
alize the Integral Active Steering.
The warning lamp lights up. A Check
Control message is displayed.1.With the engine running, turn the steering
wheel all the way to the left and right sev‐
eral times in a uniform manner until the
warning lamp disappears.2.Have the system checked if the warning
lamp does not go out after moving the
steering wheel approx. 6 times or if the
steering wheel is at an angle.
Using snow chains
Note When snow chains are in use, refer to
page 196, rear wheel steering is deactivated.
Programs The system offers several different programs.
The programs can be selected via the Driving
Dynamics Control, refer to page 120.
SPORT
Consistently sporty tuning of the Integral Ac‐
tive Steering for greater driving agility.
COMFORT
Balanced tuning of the Integral Active Steering
for optimal traveling comfort.
Malfunction
In the event of a malfunction, the steering
wheel must be turned further, while the vehicle
responds more sensitively to steering wheel
movements in the higher speed range.
The stability-enhancing intervention may be
deactivated.
Proceed cautiously and drive defensively.
Have the system checked.
Driving Dynamics Control The conceptThe Driving Dynamics Control can be used to
adjust the driving dynamics of the vehicle. For
this purpose various programs are available for
selection that are activated via the two buttons
of the Driving Dynamics Control and the DSC
OFF-button.
Operating the programsPress the buttonProgramDSC OFF
TRACTIONSPORT+
SPORT
COMFORT
COMFORT+
ECO PROSeite 120ControlsDriving stability control systems120
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Driving comfortVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equip‐
ment is also described that is not available in a
vehicle, e. g., because of the selected optional
equipment or country variant. This also applies
for safety-related functions and systems.
Active Cruise Control with Stop & Go function, ACC
The conceptThis system can be used to select a desired
speed that the vehicle will maintain automati‐
cally on clear roads.
To the extent possible, the system automati‐
cally adjusts the speed to a slower vehicle
ahead of you.
The distance that the vehicle maintains to the
vehicle ahead of you can be varied.
For safety reasons, it depends on the speed.
To maintain a certain distance, the system au‐
tomatically decelerates, applies the brakes
lightly, or accelerates again if the vehicle ahead
begins moving faster.
If the vehicle ahead of you brakes to a halt, the
system is able to detect this within the given
system limits. If the vehicle ahead of your
drives away again from a halt, your vehicle is
able to accelerate if operated accordingly.
Even if some time passes before the vehicle
drives away again, the BMW can still be accel‐
erated automatically and simply.
As soon as the road is clear, it accelerates to
the desired speed.
The speed is also maintained on downhill gra‐
dients, but may not be maintained on uphill
slopes if engine power is insufficient.General information
When ECO PRO is activated, cruise control is
also set to a driving style that saves on fuel
consumption.
Notes Personal responsibility
The system does not relieve the driver of
the responsibility to adapt his or her speed,
distance and driving style to the traffic condi‐
tions. Drive attentively, and react to the current
traffic events. Intervene actively when neces‐
sary, e.g., by braking, steering or making an
evasive maneuver, otherwise, there is danger
of an accident.◀
At a glance
Buttons on the steering wheelPress the
buttonFunctionCruise control on/off, interrupt‐
ing, refer to page 125Store/maintain speed, refer to
page 126Resume speed, refer to
page 127Reduce distance, refer to
page 127Increase distance, refer to
page 127Adjust distance, refer to
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Press the
buttonFunctionRocker switch:
Change/maintain speed, refer
to page 126Congestion Assistant ON/OFF,
Pause, refer to page 130
The arrangement of the buttons varies accord‐
ing to the how the vehicle is equipped or coun‐
try-specific variants.
Radar sensor
A radar sensor is located in the front bumper
for detecting vehicles on the road ahead of the
vehicle.
A dirty or covered sensor may hinder the de‐
tection of vehicles.
▷If necessary, clean the radar sensor. Re‐
move layers of snow and ice carefully.▷Do not cover the view field of the radar
sensor.Camera
The camera is located near the base of the
mirror.
Keep the windshield in the area behind the in‐
terior rearview mirror clean and clear.
Switching on/off and interrupting
cruise control
Switching on Press the button on the steering
wheel.
The indicator lamps in the instrument cluster
light up and the marking in the speedometer is
set to the current speed.
Cruise control can be used.
Switching off Deactivated or interrupted system
If the system is deactivated or inter‐
rupted, actively intervene by braking, steering
and, if necessary, with evasive maneuvers; oth‐
erwise, there is the danger of an accident oc‐
curring.◀
If switching off the system while stationary,
press on the brake pedal at the same time.
Press the button on the steering
wheel.
▷If active: press twice.▷If interrupted: press once.Seite 125Driving comfortControls125
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The displays go out. The stored desired speed
and distance are deleted.
Interrupting Press the button on the steering
wheel.
If interrupting the system while stationary,
press on the brake pedal at the same time.
The system is automatically interrupted in the
following situations:▷When the brakes are applied.▷When transmission position D is disen‐
gaged.▷When DTC Dynamic Traction Control is
activated or DSC is deactivated.▷When DSC is actively controlling stability.▷If the safety belt and the driver's door are
opened when the vehicle is standing still.▷If the system has not detected objects for
an extended period, e.g., on a road with
very little traffic without road edge line
markings.▷If the detection range of the radar is dis‐
rupted, for example, by dirt or heavy fog.
Maintaining/storing the speed
Press the button.
Or:
Press the rocker switch while the system is in‐
terrupted.
When the system is switched on, the current
speed is maintained and stored as the desired
speed.
It is displayed in the speedometer and briefly
displayed in the instrument cluster, Displays in
the instrument cluster, refer to page 128.
When cruise control is maintained or stored,
DSC Dynamic Stability Control is switched on,
if necessary.
Changing, maintaining, and storing
the speed
The rocker switch can be pressed while the
system is interrupted to maintain and store the
current speed. DSC Dynamic Stability Control
is switched on, if necessary.
Adapting the desired speed
Adapt the desired speed to the road con‐
ditions and be ready to brake at all times; oth‐
erwise, there is the danger of an accident oc‐
curring.◀
Speed differences
Large differences in speed relative to
other vehicles cannot be compensated by the
system for example in the following situations:▷When catching up rapidly with a truck.▷When another vehicle suddenly swerves
into the wrong lane.▷When stationary objects are approached at
speed.◀
Press the rocker switch up or down repeatedly
until the desired speed is set.
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Adjusting the Head-up Display, refer to
page 148.
System limits
Speed range Best results are achieved when using the sys‐
tem on well-developed roads and highways.
The desired speed can be selected between
20 mph/30 km/h to 110 mph/180 km/h.
The system can also be activated when sta‐
tionary.
Comply with the legal speed limit in every sit‐
uation when using the system.
Detection range
The detection capacity of the system and the
automatic braking capacity are limited.
Two-wheeled vehicles for instance might not
be detected.
Limited detection capacity
Because of the limits to the detection ca‐
pacity of the camera and the sensor, you
should be alert at all times so that you can in‐
tervene actively, if necessary; otherwise, there
is the danger of an accident occurring.◀
Deceleration
The system does not decelerate for:
▷Pedestrians or similar slow-moving road
users.▷Red traffic lights.▷Cross traffic.▷Oncoming traffic.
Swerving vehicles
A vehicle driving in front of you is not detected
until it is completely within the same lane as
your vehicle.
Swerving vehicles
If a vehicle driving ahead of you suddenly
swerves into your lane, the system may not be
able to automatically restore the selected dis‐
tance. This also applies to major speed differ‐
ences to vehicles driving ahead of you, e.g.,
when rapidly approaching a truck. When a ve‐
hicle driving ahead of you is reliably detected,
the system requests that the driver intervene
by braking and carrying out evasive maneu‐
vers, if necessary. You must react yourself;
otherwise, there is the danger of an accident
occurring.◀
Cornering
If the desired speed is too high for a curve, the
speed is reduced slightly in the curve, although
curves cannot be anticipated in advance.
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General information
The congestion assistant determines speed
and distance from the vehicle in front via a ra‐
dar sensor and the position of the lane marking
via a camera.
Sensors on the steering wheel detect whether
the steering wheel is being touched.
The system is deactivated as soon as contact
with the steering wheel is no longer detected.
In order to be able to use the Congestion As‐
sistant, place your hands around the steering
wheel.
When driving with gloves or with protective
covers, contact with the steering wheel cannot
be detected by the sensors. The system in this
case cannot be used.
Notes Personal responsibility
The system does not relieve the driver of
the responsibility to adapt his or her speed,
distance and driving style to the traffic condi‐
tions. Drive attentively, and react to the current
traffic events. Intervene actively when neces‐
sary, e.g., by braking, steering or making an
evasive maneuver, otherwise, there is danger
of an accident.◀
Functional requirements▷Drive on approved road type. The data on
this are stored in the navigation system.▷Driving on the limited access highway or
divided lane roads.▷Sufficient lane width.▷Lane marking is detected.▷Vehicle driving ahead is detected.▷Speed below 25 mph/40 km/h.▷Both hands on the steering wheel rim.At a glance
Buttons on the steering wheelPress the
buttonFunctionCongestion Assistant ON/OFF,
Pause, refer to page 132.Rocker switch:
Store, change/maintain speed,
refer to page 126.Maintain, store speed, refer to
page 126.Resume speed, refer to
page 127.Adjust distance, refer to
page 127.
Radar sensor
A radar sensor is located in the front bumper
for detecting vehicles on the road ahead of the
vehicle.
A dirty or covered sensor may hinder the de‐
tection of vehicles.
▷If necessary, clean the radar sensor. Re‐
move layers of snow and ice carefully.▷Do not cover the view field of the radar
sensor.Seite 131Driving comfortControls131
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Camera
The camera is located near the base of the
mirror.
Keep the windshield in the area behind the in‐
terior rearview mirror clean and clear.
Switching on/off and pausingSwitching on Press the button.
▷Prepare system: press once.▷Activate system:
The system is automatically activated be‐
low 25 mph/40 km/h.
If the ACC is not activated: press wiper.
With ACC activated: system is ready.
If ACC is not activated: indicator lamp
in the instrument cluster comes on.
If ACC is not activated: indicator lamp
in the instrument cluster comes on.
Congestion Assistant can be used.
With Congestion Assistant switched on, the
Pedestrian Warning system is active.
Switching off Deactivated or interrupted system
If the system is deactivated or inter‐
rupted, actively intervene by braking, steering
and, if necessary, with evasive maneuvers; oth‐
erwise, there is the danger of an accident oc‐
curring.◀
Press the button.
The indicator goes out. Stored desired speed
and distance are still kept by the ACC.
The system no longer steers independently.
Interrupting When active, press the button.
The system is automatically interrupted in the
following situations:▷At a speed above 25 mph/40 km/h.▷With only one detected lane marking.▷When you leave the limited access high‐
way.▷When you leave the divided lane road.▷When the steering wheel is released.▷When steering intervention is active.▷When you leave your own lane.▷With incorrect vehicle ahead.▷When the turn signal is on.
Red flashing and signal tone:
Congestion Assistant is interrupted.
The system no longer steers independ‐
ently. ACC exercises control.
If the system conditions are met, the system
reactivates automatically.
Distance Selecting a distance
Adjust the distance according to the traf‐
fic and weather conditions; otherwise, there is
the danger of an accident occurring. Maintain
the prescribed safety distance.◀
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Adjust distancePress the button repeatedly until the
desired distance is set.
Distance to vehicle ahead of you The selected distance to the vehicle driving
ahead of you is shown.Distance displayDistance 1Distance 2Distance 3Distance 4
This value is set after the system is
switched on.
Selecting a distance
Adjust the distance according to the traf‐
fic and weather conditions; otherwise, there is
the danger of an accident occurring. Maintain
the prescribed safety distance.◀
Displays in the instrument cluster
SymbolDescriptionCongestion Assistant and Distance
Control on standby.Congestion Assistant on standby.
Distance control controls within the
set distance.Congestion Assistant activated.
The system controls the speed and
assists with maintaining the lane.SymbolDescriptionRolling bars: at least one functional
requirement is no longer satisfied.
The system soon deactivates the
automatic steering. ACC on
standby.Red flashing and signal tone: con‐
gestion Assistant is interrupted.
The system does not steer inde‐
pendently. ACC exercises control.
System limits
When driving within narrow driving lanes, e.g.,
in construction zones or rescue lanes, the sys‐
tem cannot be activated or meaningfully used.
Limited detection capacity
Because of the limits to the detection ca‐
pacity of the camera and the sensor, you
should be alert at all times so that you can in‐
tervene actively, if necessary; otherwise, there
is the danger of an accident occurring.◀
Complying with country-specific laws
When the Congestion Assistant is used,
observe specific national laws.◀
Cruise control
The concept The system is functional at speeds beginning
at approx. 20 mph/30 km/h.
It maintains the speed that was set using the
control elements on the steering wheel.
The system brakes on downhill gradients if en‐
gine braking action is insufficient.
Unfavorable conditions
Do not use the system if unfavorable
conditions make it impossible to drive at a con‐
stant speed, for instance:
▷On curvy roads.Seite 133Driving comfortControls133
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