2005 BMW 645CI COUPE&CONVERTIBLE lights

Controls
61Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
The system reverts to operation at normal
speed whenever the vehicle is stationary.
Rain sensor
Wiper operation is controlled automatically as a
function of the rain intensity. The rain sensor is
located on the windshield, directly in front of the
interior rearview mirror.
Activating rain sensor
Press button. The LED in the button lights up.
Adjusting rain sensor sensitivity level
Turn the serrated dial 5.
Deactivating rain sensor
Press the button again. The LED goes out.
Deactivate the rain sensor when passing
through an automatic car wash. Failure to
do so could result in damage caused by undes-
ired wiper activation.<
Cleaning windshield and headlamps
The system sprays washer fluid against the
windshield and activates the wipers for a brief
period.
When the vehicle lighting system is switched
on, the headlamps are also cleaned at regular
and appropriate intervals.
Do not use the washers if there is any
danger that the fluid will freeze on the
windshield. If you do so, your vision could be
obscured. To avoid freezing, use a washer fluid
antifreeze, refer to Washer fluid.
Do not use washers when the washer fluid res-
ervoir is empty, as otherwise the washer pump
will be damaged.<
Windshield washer nozzles
The windshield washer nozzles are automati-
cally heated in ignition key position 2.
Washer fluid
Washer fluid antifreeze is flammable.
Always keep it well away from sparks and
open flames, and store it in tightly closed con-
tainers well out of the reach of children. Always
observe the instructions for use provided on the
containers.<
Washer fluid reservoir
Capacity approx. 5.3 US quarts/5 liters
Fill with water and – if required – with a washer
antifreeze, according to manufacturer's recom-
mendations.
In order maintain the mixture ratio, mix
the washer fluid before filling.<
Cruise control
The concept
The cruise control is available for use at speeds
of approx. 20 mph/30 km/h and higher. The
vehicle maintains and stores the speed that you
set using the lever mounted on the steering col-
umn.
Do not use the cruise control under driv-
ing conditions that do not permit a con-
stant speed, e.g.when driving on winding roads,
in heavy traffic or in poor road conditions such
as snow, rain, ice, and loose road surface.<

Driving
64
Displays in instrument cluster
1Stored desired speed display
2Detected vehicle display.
Lights up when vehicle driving ahead is
detected
3Selected distance to vehicle driving ahead
4Digital speed display.
Appears briefly when you select your
desired speed
The system is activated.
The display3 appears as soon as
you activate the system and no
vehicle is detected driving ahead.
Vehicle detected.
The display2 lights up yellow
when a vehicle is detected driving
ahead.
The system requests that you
intervene by braking or with an
evasive maneuver.
The display2 flashes red and a sig-
nal sounds. The active cruise con-
trol cannot automatically restore the distance to
the vehicle driving ahead. You will find more
detailed information on page67.
Automatic intervention by ABS or
DSC, or you actuate the parking
brake while driving.
The display2 flashes yellow. The
active cruise control now only
intervenes by braking.
Desired speed store and increase
Press the lever forward1 at a driving speed of
more than approx. 20 mph/30 km/h:
The system adopts and stores your current
speed as a desired speed. This speed is indi-
cated on the speedometer and displayed briefly
in the instrument cluster.
Subsequently pressing forward increases the
desired speed to the next multiple of 5 mph/
10 km/h.
Each time the lever is pressed forward again,
the desired speed is increased by another
5 mph/10 km/h until a maximum of 110 mph/
180 km/h is reached. The speed then displayed
is stored and achieved, provided that the road is
clear.
If the display ACC --- mph/km/h briefly
appears in the instrument cluster, it might
be that conditions necessary for operation are
not currently being met.
To call up Check Control messages, refer to
page71.<
Desired speed store and decrease
Pull back the lever2:
The current driving speed is rounded off to the
next multiple of 5 mph/10 km/h, displayed and
stored.
Each time the lever is pulled back again, the
desired speed is decreased by another 5 mph/
10 km/h until the minimum speed of 20 mph/
30 km/h is reached. The speed then displayed
is stored and achieved, provided that the road is
clear.

Driving
68
Swerving vehicles
When a vehicle moves from an adjacent lane
into your lane, active cruise control will not
recognize this vehicle until it is fully in your lane
ahead of your vehicle.
Malfunction
The indicator lamp lights up and a mes-
sage appears on the Control Display.
The build-up of foreign matter, e. g.,
snow, ice, dirt, road debris, etc., can lead to
reduced detection performance of active cruise
control. You should check the sensor under the
front bumper and clean it as necessary prior to
driving your vehicle. If the sensor becomes cov-
ered by foreign matter or has a malfunction, it is
possible that the sensor will no longer be able to
detect vehicles in front of you. After the system
recognizes that the sensor is no longer func-
tional, a message is displayed on the Control
Display and an acoustic signal is emitted.
When the system does not detect any objects,
e.g. on seldom used roads without a shoulder or
guard rails, the system may temporarily deacti-
vate itself.

Technology for comfort, convenience and safety
80
Technology for comfort, convenience and
safety
PDC Park Distance Control*
The concept
The PDC assists you when you are parking.
Audible signals and an optical display
* indicate
that you are approaching an object in front of or
behind your vehicle. To measure the distance,
there are four ultrasonic sensors in each
bumper. The sensors at the front and at the two
rear corners have a range of approx. 24 in/
60 cm; the rear middle sensors have approx.
5ft/1.50m.
PDC is a parking aid that can indicate
objects when they are approached
slowly, as is usually the case when parking.
Avoid approaching an object at high speed, as
otherwise the physical circumstances would
mean that the system warning was too late.<
Automatic mode
In ignition key position 2, the system automati-
cally assumes operational status after approx.
1 second each time you shift into reverse or
move the selector-lever to position R.
Wait this short period before driving. The sys-
tem switches off when you disengage the
reverse gear.
Manual mode
Press the button; the LED lights up.
Deactivating manual mode
Press the button again; the LED goes out.
The system is automatically deactivated once
the vehicle travels approx. 165 ft/50 m or
exceeds a speed of roughly 20 mph/30 km/h;
the LED goes out. You can reactivate the sys-
tem manually as needed.
Signal tones
An intermittent signal indicates the distance of
the vehicle from an object being approached.
Thus, an object detected to the left rear of the
vehicle will be indicated by a signal tone from
the left rear speaker, etc. As the distance
between vehicle and object decreases, the
intervals between the tones become shorter.
The signal tone becomes continuous once the
distance to the nearest object falls to below
roughly 1 ft/30 cm.
The warning signal is canceled after approx.
3 seconds if you are moving parallel to a wall.
Malfunction
The LED in the button flashes and a message
appears on the Control Display. PDC is mal-
functioning. Have the system checked.
As a preventive measure, keep the sensors
clean and free of ice or snow in order to ensure
that they will continue to operate effectively.
PDC with visual warning*
You also enjoy the option of having the system
show the approach to an object on the Control
Display. The Control Display also indicates the
presence of objects before they are close
enough to trigger a signal tone.
Control Center, for principle details, refer to
page16.

Technology for comfort, convenience and safety
82 Do not reduce the pressure on the brake pedal
for the duration of the brake application. When
the brake pedal is released, DBC is deactivated.
DSC Dynamic Stability Control
The system prevents slip at the drive wheels
when driving off and accelerating. DSC also
detects unstable driving conditions such as
fishtailing or sliding of the front wheels. In these
cases DSC helps the vehicle safely stay on
course within the physical limits by reducing the
engine output and through braking actions in
the individual wheels.
The DSC is operational every time you start the
engine.
The laws of physics cannot be repealed,
even with DSC. An appropriate driving
style always remains the responsibility of the
driver. Therefore, do not reduce the additional
safety margin again by taking risks.<
DTC Dynamic Traction Control
DTC is a variant of DSC for special road condi-
tions, e.g. uncleared snow-covered roads, that
is optimized for forward momentum. The sys-
tem ensures maximum forward momentum, but
with limited driving stability. Therefore, drive
with the corresponding caution.
You may find it useful to briefly activate DTC
under the following special circumstances:
>When driving on snow-covered uphill
grades, in slushy snow or on uncleared,
snow-covered roads
>When rocking a stuck vehicle free or when
starting off in deep snow or on loose ground
>When driving with snow chains
*
Activating DTC
Press the button; the DTC indicator lamp in the
instrument cluster lights up.
Deactivating DTC again
Press the button again; the DTC indicator lamp
in the instrument cluster goes out.
Deactivating DTC and DSC together
Press the button until the DSC indicator lamp in
the instrument cluster lights up, however not
longer than approx. 10 seconds. Interventions
promoting stability and forward momentum will
no longer be carried out. In addition, the stability
promoting intervention of the active steering
*
is deactivated, refer to page85.
A message appears on the Control Display.
Please note any supplementary information
that appears there.
To support enhanced operating stability, reacti-
vate DSC again as soon as possible.
Reactivating DSC
Press the button; the indicator lamp in the
instrument cluster goes out.

Controls
83Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
To control
The indicator lamp flashes:
DSC or DTC controls the drive forces
and brake forces.
The indicator lamp comes on:
DSC and DTC are deactivated together via the
button DTC.
The indicator lamp comes on: DTC is
activated via the DTC button.
Malfunction in the driving-stability
control systems
The brake system warning lamp lights
up in red, appearing together with the
indicator lamps for ABS and DSC. A
message appears on the Control Dis-
play. The driving-stability control sys-
tems have failed. Conventional braking
efficiency remains available without
limitations.
While you may continue, you should remember
to proceed cautiously and drive defensively
while avoiding full brake applications.
Have the system checked as soon as possible.
Display of the previously described
malfunction on Canadian models.
The DSC indicator lamp lights up. A
message appears on the Control Dis-
play. A malfunction has occurred in
DSC and DTC.
The stability maintenance functions are no
longer available. The vehicle remains opera-
tional.
Have the system checked as soon as possible.
The warning lamp for the brake system
lights up in yellow. A message appears
on the Control Display. DBC has failed.
Have the system checked as soon as possible.Display of the previously described
malfunction on Canadian models.
Active roll stabilization*
The concept
Active roll stabilization minimizes body roll and
optimizes vehicle stability during cornering and
evasive maneuvers.
Dynamic stabilizers at the front and rear axles
form the basis for active roll stabilization. Sus-
pension compliance adapts to suit driving con-
ditions, varying from performance-oriented
during cornering to smooth and comfort-ori-
ented when the vehicle is proceeding in a
straight line. During vehicle operation, the sys-
tem continuously runs through closed-loop
control cycles lasting only fractions of a second.
The system assumes operational status each
time you start the engine.
Malfunction
The warning lamp lights up and a mes-
sage appears on the Control Display.
There is a malfunction in the system.
Have the system checked as soon as possible.
If there is a malfunction in the system,
please remember to adapt your speed
accordingly, especially in curves.
The suspension will be noticeably softer and
the vehicle will display a greater tendency to tilt
during cornering and in crosswinds.
If a message stating that you should stop
appears on the Control Display, stop and switch
off the engine as soon as possible. In this case
the oil level in the reservoir may have dropped
below the minimum, possibly owing to a leak in
the hydraulic system. Do not continue driving.
Contact your BMW center.<

Controls
85Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Report of a flat tire
The warning lamp lights up in red. A
message appears on the Control Dis-
play. In addition, an acoustic signal
sounds. There is a flat tire or extensive inflation
pressure loss.
1.Cautiously reduce the vehicle speed to
below 50 mph/80 km/h. Avoid sudden brak-
ing and steering maneuvers. Do not exceed
a vehicle speed of 50 mph/80 km/h.
If the vehicle is not, as provided at the
factory, equipped with run-flat tires,
refer to page172, stop driving. Continued
driving after a flat tire can result in serious
accidents.<
2.Check the air pressure in all four tires at the
next opportunity.
If the tire inflation pressure in all four
tires is correct, the Flat Tire Monitor
may not have been initialized. The system
must then be initialized.<
3.In case of a complete loss of the tire inflation
pressure or obvious tire damage, you can
estimate the possible driving distance for
continued driving base on the following ref-
erence values:
>With low load:
1 to 2 persons without luggage:
approx. 155 miles/250 km.
>With medium load:
2 persons, luggage compartment full, or
4 persons without luggage:
approx. 94 miles/150 km.
>With full load:
4 persons, luggage compartment full:
approx. 30 miles/50 km.
Drive reservedly and do not exceed
a speed of 50 mph/80 km/h. In the
event of pressure loss, vehicle handling
changes. This includes reduced tracking
stability in braking, extended braking dis-
tance and altered natural steering charac-
teristics.
If unusual vibrations occur while the vehicle
is being driven, this can indicate final failure
of the damaged tire. Reduce speed and stop as soon as possible. Do not continue
driving. Contact your BMW center.<
Malfunction
The warning lamp lights up in yellow. A
message appears on the Control Dis-
play. The Flat Tire Monitor has a mal-
function or has failed. Have the system checked
as soon as possible.
Active steering*
The concept
The active steering is a system that actively var-
ies the steering angle of the front wheels in rela-
tion to the steering wheel movements.
A t l o w s p e e d , e . g . i n a t o w n o r w h e n p a r k i n g , t h e
steering angle of the wheels is reinforced, i.e.
the steering becomes very direct.
In the higher speed range, on the other hand,
the steering angle is reduced more and more.
This improves the handling capability of your
BMW over the entire speed range.
In critical situations, the system can make tar-
geted corrections to the steering angle pro-
vided by the driver and thus stabilize the vehicle
before the driver intervenes. This stability-pro-
moting intervention is deactivated when DSC is
switched off, refer to page82.
Malfunction
The warning lamp lights up. The active
steering is no longer operational. At low
speed, larger steering wheel move-
ments are required, while the vehicle reacts
more sensitively to steering wheel movements
in the higher road-speed range. Have the sys-
tem checked.
If the warning lamp lights up during the first
engine starting following a power supply inter-
ruption, the system must be activated by being
initialized.

Technology for comfort, convenience and safety
86
Initializing system
1.Start the engine.
2.With the vehicle stationary, turn the steer-
ing wheel from the straight-ahead position
to the left as far as it will go and then back to
the straight-ahead position.
3.Switch off the engine.
When you start the engine again, all the func-
tions of the active steering will be available once
again.
Brake Force Display
The Brake Force Display lights up in two stages
depending on how strongly you brake.
>Normal braking:
The brake lamps and the third brake lamp
go on.
>Heavy braking and braking with ABS:
In addition, the illuminated area of the rear
brake lamps is enlarged, refer to illustration.
Airbags
The following airbags are located under the
marked covers:
1Front airbags for driver and front passenger
2Coupe: Head airbags
3Front side airbags
4Knee airbag for front passenger
5Knee airbag for driver
Protective action
To ensure that the safety systems con-
tinue to provide optimized protection,
please observe the adjustment instructions on
page44. front passenger by responding to frontal
impacts in which safety belts alone cannot pro-
vide adequate restraint. When needed, the
head and side airbags help provide protection in
the event of a side impact. The side airbag sup-
ports the side upper body area. The head air
bag supports the head.
The airbags are deliberately not triggered in
every impact situation, e.g. less severe acci-
dents, certain rollover conditions, or rear-end
collisions.
For information on the correct sitting position,
refer to page44.