2004 BMW 745i engine

Technology for comfort, convenience and safety
92
In case of malfunction
If the brake system warning lamp
lights up in red, together with the
yellow indicator lamps for ABS and
DSC: the stability control is no
longer operational.
If all three lamps light up in yellow:
malfunction in the stability control
systems. The electronic brake-
force distribution is active.
While you may continue, you should
remember to proceed cautiously and drive
defensively while avoiding full brake appli-
cations.
Please have the system checked at the
nearest BMW center.
Check Control messages, refer to page 82.
Please take note of the additional informa-
tion on the Control Display.
Indicator and warning lamps on
Canadian models.
Driving stability control/
DSC Dynamic Stability
Control
The concept
DSC maintains vehicle stability, even in
critical driving situations.
The system optimizes vehicle stability dur-
ing acceleration and when starting from a
full stop, as well as optimizing traction.
The system recognizes any tendency for
the vehicle to assume an unstable attitude
such as oversteer or understeer; it then
counteracts this tendency with a combina-
tion of graduated reductions in engine
torque and selective braking intervention at
individual wheels. DSC provides optimized stability within the limits defined by the
laws of physics.
The DSC is operational every time you start
the engine. DSC includes the functionality
of the DTC Dynamic Traction Control and
DBC Dynamic Brake Control.
Indicator lamps
The indicator lamp in the Info Dis-
play goes out soon after you start
the engine.
If the indicator lamp flashes:
DSC controls the drive and braking forces.
The indicator lamp stays lit:
DSC has been switched off using the Con-
trol Center.
The indicator lamp and the brake
warning lamp remain on continu-
ously:
DSC, DTC and DBC have been
deactivated or a system malfunc-
tion is present.
When the system is off, the stability main-
tenance functions described above are no
longer available. The vehicle will remain
completely operational, however, without
DSC.
Please respond to any malfunctions by
referring the problem to your BMW center.
Indicator and warning lamps on
Canadian models.
DTC Dynamic Traction Control
In particular driving situations, in deep
snow, for example, DTC ensures the maxi-
mum forward momentum. The gain in for-
ward momentum in these situations
involves a reduction in vehicle stability.
DTC is active up to 45 mph/70 km/h.

Technology for comfort, convenience and safety
94 In the event of a malfunction, the
warning lamp lights up yellow.
Have the system checked and
repaired at your BMW center as soon as
possible.
Check Control messages, refer to page 82.
Please take note of the additional informa-
tion on the Control Display.
Warning lamp on Canadian models.
Dynamic Drive
The concept
Dynamic Drive minimizes body roll and
optimizes vehicle stability during cornering
and evasive maneuvers.
Active stabilizers at the front and rear axles
form the basis for Dynamic Drive. Suspen-
sion compliance adapts to suit driving con-
ditions, varying from performance-oriented
during cornering to smooth and comfort-
oriented when the vehicle is proceeding in
a straight line.
The system assumes operational status
each time you start the engine.
Driving with Dynamic Drive
During vehicle operation, the system con-
tinuously runs through closed-loop control
cycles lasting only fractions of a second.
In case of malfunction
The symbol will light up, accompa-
nied by a status message in the
Check Control. Please take note of
the additional information on the Control
Display.
You can find more information on the
Check Control starting on page 82.
If the Dynamic Drive system switches
off in response to malfunction, please
remember to adapt your speed accord-
ingly, especially in curves.
The suspension will be noticeably softer
and the vehicle will display a greater ten-dency to tilt during cornering and in cross-
winds.
If a Check Control message stating that
you should stop appears in addition to the
red symbol, stop immediately and switch
off the engine. In this case the oil level in
the reservoir may have dropped below the
minimum, possibly owing to a leak in the
hydraulic system.
Please observe the additional instructions
provided on the Control Display.<
EDC Electronic Damping
Control*
The suspension responds to changes in
factors such as road surface, or operating
conditions such as steering and braking, by
adapting to the new conditions within frac-
tions of a second.
Two programs are available; they can be
selected in the "Settings" menu.
Comfort program
The Comfort program is suitable for use
throughout the vehicle's entire speed range
and regardless of load.
Sport program
You should select the Sport program for
consistently performance-oriented
response from shock absorbers and steer-
ing.

Controls
95Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Flat Tire Monitor
The concept
The Flat Tire Monitor keeps track of the
inflation pressures in the four fitted tires as
you drive. The system provides an alert
whenever the inflation pressure of one tire
drops significantly in relation to the pres-
sure of another tire.
The check of the tire inflation pressure is
based on monitoring the relative speeds of
the wheels. A flat tire is detected and
reported on the basis of a deviation in cer-
tain speed ratios.
Functional requirements
So that the Flat Tire Monitor can learn the
correct inflation pressure, please perform
the following:
1.Check the inflation pressures in all tires
2.Compare with the inflation pressure
table on page 189 and correct if neces-
sary
3.Initialize the system.
Limits of the system
The Flat Tire Monitor cannot indicate
sudden severe tire damage caused
by outside factors and does not detect a
natural, even pressure drop in all four
tires.<
In the following situations, on the other
hand, there can be delays in detecting tire
pressure losses, and even system failure:
>When you are driving on snow-covered
or slippery road surfaces
>In the case of performance-oriented
driving: slip on the drive wheels, high
lateral acceleration
>False alarms and undetected loss of
pressure may occur when you are driv-
ing with snow chains fitted.
Initializing the system
Perform the initialization immediately
after correcting the inflation pressure,
changing a tire or changing a wheel or all
wheels. A drive is necessary for this pur-
pose.<
1.Start the engine, but do not drive off
2.Select "FTM" from the "Settings" menu
and confirm. The initialization menu
appears
3.Select "SET" and confirm
4.Drive off.
Status: "FTM is being initialized" is dis-
played.
It takes at least 10 minutes before the Flat
Tire Monitor can detect and report a flat
tire.
When driving with snow chains, do
not initialize the system.<
Select and confirm to exit from the
menu.

Controls
103Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
1Automatic air distribution and supply,
left side of passenger
compartment106
2Outside air/AUC Automatic recircu-
lated-air control/recirculated air104
3Defrosting windshield and windows
and removing condensation104
4Temperature, left side of passenger
compartment104
5Maximum cooling104
6Air supply, left side of passenger
compartment104
7Switching off automatic climate
control106
8Air supply, right side of passenger
compartment104
9Temperature, right side of passenger
compartment104
10Residual heat mode105
11Rear window defroster 12Switching air conditioner mode on and
off manually104
13Automatic air distribution and supply,
right side of passenger
compartment106
14Air grill for interior temperature sensor Ð
please keep clear and unobstructed
15Independent ventilation109
>Activation time activated:
The indicator lamp comes on
>Independent ventilation switched
on:
The indicator lamp flashes
All other setting options for the auto-
matic climate control can be found at
"Settings" using the Control Center, refer
to page 106.
The current settings for temperature and air
supply are displayed to you in the status
line of the Control Display.
A description of the Control Center is pro-
vided on page 17.<
A congenial climate
Activate the automatic mode using the
AUTO button or "AUTO" in the Control
Center, refer to page 106. Select an interior
temperature you find pleasant.
The following section contains more
detailed information on the available set-
ting options.
All of the air conditioner functions,
including Maximum cooling, refer to
page 104, and the Rear air conditioner,
refer to page 108, are available only when
the engine is running.< Your vehicle has been designed to
automatically select your personal
climate-control settings whenever you
unlock the doors using your individually
programmed remote control.<
Automatic air distribution and supply
The AUTO program adjusts the
airflow and distribution patterns
for you while also using your
preselected temperature setting as the
basis for adjusting the interior climate to
adapt to external influences: summer, win-
ter.

A congenial climate
104 The air conditioner comes on automatically
when you select the AUTO program.
Temperature adjustment
You can turn to select the
desired temperatures for the
driver and passenger sides.
Your settings appear on the
Control Display's status line.
The figures in the display provide a general
indication of interior temperature. When
you start the vehicle, this system ensures
that the selected temperature is achieved
as quickly as possible. It then maintains
this temperature, regardless of the season.
Defrosting windows and removing
condensation
This program quickly removes
ice and condensation from the
windshield and door windows.
Adjusting air supply manually
You can adjust the air supply by
turning. The automatic air sup-
ply control is operational when-
ever you see your selection
represented by a bar on the
Control Display's status line. The automatic
air distribution remains in operation as
before. You can reactivate the automatic
air supply mode with the AUTO button.
Switching air conditioner mode on
and off manually
The air conditioner cools and
dehumidifies the incoming air
before also reheating it as
required, according to temperature setting.
Depending on the weather, the windshield
may fog over briefly when the engine is
started.
The air conditioner comes on automatically
when you select the AUTO program.
Maximum cooling
This program quickly provides
maximum cooling.
The temperature display reverts
to 607/166 while the system
switches to the recirculated-air mode and
starts to provide maximum air supply
through the vent outlets only. For this rea-
son you should ensure that these outlets
are open before selecting this program.
Outside air/AUC Automatic
recirculated-air control/
recirculated air
You can respond to unpleasant
odors or pollutants in the imme-
diate environment by tempo-
rarily suspending the supply of outside air.
The system then recirculates the air cur-
rently within the vehicle. AUC executes this
function automatically.
Press the button repeatedly to run through
the following control sequence:
>Indicator lamps off: outside air flows
into the vehicle
>Left indicator lamp on, AUC mode: the
system detects pollutants in the outside
air and responds by blocking the supply
of outside air when required. The sys-
tem then recirculates the air currently
within the vehicle.
Depending upon air quality, in the auto-
matic mode the system may start to
alternate between its outside-air and
recirculated-air modes
>Right indicator lamp on, recirculated-
air mode: the supply of outside air into
the vehicle is permanently blocked.
The system then recirculates the air
currently within the vehicle.
If condensation starts to form on the
inside window surfaces during opera-
tion in the recirculated-air mode, you
should switch it off while also increasing air
supply as required.<

Controls
105Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Residual heat mode
The system uses the warmth
stored in the engine to heat the
interior when the ignition is off,
for instance, while the vehicle
is stopped at a school to pick
up a child.
You can adjust the automatic climate con-
trol's settings when the ignition lock is in
the radio mode. The system blows heated
air into the interior in accordance with the
selected distribution pattern while the igni-
tion is off.
Provided that the engine has warmed
to its normal operating temperature
and the battery is charged, you can use this
function for up to 15 minutes after switch-
ing off the ignition. The LED within the but-
ton lights up to confirm compliance with
both of these conditions.<
Front ventilation
You can adjust the vent outlets for the
upper body to suit your personal require-
ments.
You can use the serrated dials 1 to open
and close the outlets through an infinitely-
variable range, while the serrated dials 2
allow you to adjust the airflow direction.
Ventilation for cooling
Adjust the vents to direct the flow of cool
air in your direction, for instance, if the inte-
rior has become too warm, etc.
Draft-free ventilation
Set the vent outlets so that the air flows
past you and is not directed straight at you. You can also individually adjust the air
temperature of the air vents for the
upper body area in the Control Center,
refer to page 107.
If the ventilation grill is completely closed,
the vehicle interior is ventilated indirectly
by air vents on the upper side of the cock-
pit.<
Ventilation for storage compartment
in front armrest
You can use the serrated dial in the storage
compartment to open and close the vent.
Depending upon the temperatures
selected at the rear dials, high tem-
peratures may occur in the storage com-
partment. Close the vent as required.<
Ventilation in the rear
The serrated dials 1 allow you to open and
close the ventilation outlets through an infi-
nitely-variable range.
You can adjust the airflow direction using
the levers 2.
The serrated dials 3
* control the amount of
cooled air in the flow from the vent outlets:
Turn towards blue: colder
Turn towards red: warmer.

Controls
113Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
3Rear window blind
4Switching to the other side
The side window blind cannot be
extended unless the side window is
closed. If the window is open, the blind will
rise slightly prior to immediately retracting
to its original position.<
Briefly press the safety switch in the
driver's door, refer to page 42. The
indicator lamp must light up. This precau-
tion prevents children from operating the
sun blinds using the rear switches, etc.
Before using always ensure that the sun
blind's travel path is clear and unob-
structed.
When leaving the vehicle, always remove
the remote control from the ignition lock
and close the doors; this precaution pre-
vents children from using the sun blinds
and injuring themselves, etc.<
Automatically extending and
retracting the sun blinds
You can extend and retract the sun blinds
together by pressing and holding button 3
or the button in the driver's door.
Rear cooler*
The rear cooler is located behind the rear
seats' center armrest.
Switching on/off
As of radio position, press the button,
arrow 1; the indicator lamp in the button
comes on. Vehicles with rear air conditioner:
Once switched on, the rear cooler
operates whenever the engine is running.
High temperatures in the luggage compart-
ment can affect the temperature in the rear
cooler.
Vehicles without rear air conditioner:
After the ignition has been switched off, the
rear cooler is switched off automatically
after a short period.
When a low voltage is reached, it is auto-
matically switched off to protect the vehicle
battery. The indicator lamp in the button
flashes.
In the event of a malfunction, please con-
tact your BMW center.<
Press the button, arrow 1, once again to
switch off the rear cooler.
Opening
Press button and open cooler, arrow 2.
Switching on/off using the Control
Center*
When the rear air conditioner unit is
switched on, the rear cooler operates
whenever the engine is running.<
1.With the ignition on, select "Climate"
2. Select the second page of the "Cli-
mate" menu
3.Select "Extra" and confirm
4.Select "Rear refr. box" and confirm.
Select "Rear refr. box" a second time and
confirm to switch the unit off.

Things to remember when driving
122
Things to remember when driving
Break-in procedures
To ensure that your vehicle continues to
furnish optimized economy of operation
throughout an extended service life, we
request that you devote careful attention
to the following section.
Engine and differential
Up to 1,200 miles/2,000 km:
During this initial period you should attempt
to avoid constant, steady-state operation
and vary both vehicle and engine speeds
as often as possible. Until the break-in
period has been completed you should
also refrain from exceeding the following:
>4,500 rpm or 105 mph/170 km/h.
Always obey all official speed limits.
Avoid full-throttle operation and use of the
transmission's kickdown mode during
these initial miles.
Once you have driven 1,200 miles/
2,000 km, the engine or vehicle speeds
can be gradually increased.
You should also comply with these break-in
procedures should the engine or differen-
tial need to be replaced at a later point.
Tires
Due to technical factors associated with
their manufacture, tires do not achieve their
full traction potential until after an initial
break-in period.Therefore, drive reservedly
during the first 200 miles/300 km.
Brake system
Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve opti-
mized contact and wear patterns between
brake pads and rotors.
General driving notes
High temperatures
Extreme temperatures occur at the
catalytic converter on this and every
catalyst-equipped vehicle. Do not remove
the heat shields installed adjacent to vari-
ous sections of the exhaust system, and
never apply undercoating to them.
When driving, standing at idle and while
parking take care to avoid possible contact
between the hot exhaust system and any
highly flammable materials such as hay,
leaves, grass, etc. Such contact could lead
to a fire, accompanied by the risk of serious
property damage as well as personal
injury.<
Parking the vehicle
Condensation forms in the air conditioner
system during operation, and then exits
under the vehicle. Traces of condensed
water under the vehicle are thus normal.
Before driving into the car wash
1.Fold in the exterior mirrors, refer to
page 51, as otherwise they could be
damaged due to the width of the vehicle
2.Leave the remote control in the ignition
lock, as otherwise the position P of the
automatic transmission will automati-
cally be selected when the remote con-
trol is removed, refer to pages 61
and 67.
With Comfort Access, be sure to
observe the instructions on page 61
3.Release the parking brake, especially
when you have activated Automatic
Hold, refer to pages 62 and 63.
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 surface. This phenomenon is referred