2004 BMW 745i cooling

At a glance
15Reference
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
1Glasses compartment115
2Storage compartment115
3Switching audio and video sources on/
off and adjusting volume149
4Telephone keypad, folding176
5Automatic air distribution and supply,
left side of passenger
compartment103
6Outside air/AUC Automatic recircu-
lated-air control/recirculated air104
7Defrosting windshield and windows
and removing condensation104
8Control Display17
9Temperature, left side of passenger
compartment: turn
Maximum cooling: press104
10Glass roof, electric42
11Memory buttons for integrated
universal remote control111
12Air supply, left side of passenger
compartment: turn
Switching off automatic climate
control: press104, 106
13Reading lamps101
14Hazard warning flashers
15Interior lamps100
16Air supply, right side of passenger
compartment103
17Temperature, right side of passenger
compartment: turn
Residual heat mode: press103, 105
18Rear window defroster
19Air conditioning104
20Starting an emergency call177
21Opening the glove compartment
22Automatic air distribution and supply,
right side of passenger
compartment106
23Station/track search and CD, DVD148
24Central locking system36
25Controller17
26Control Center buttons1727Seat adjustment44
Heated seats49
Active seat ventilation50
Active seat51
Seat, mirror and
steering wheel memory53

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.

A congenial climate
108 Select "Individual" and confirm. The AUTO
program is deactivated.
Microfilter/activated-charcoal filter
The microfilter removes dust and pollen
from the incoming air. The activated-char-
coal filter provides additional protection by
filtering gaseous pollutants from the out-
side air. Your BMW center replaces this
combined filter as a standard part of your
scheduled maintenance.
You can select a display of more detailed
information in the Service Interval Display,
refer to page 81.
Rear air conditioner*
The following settings and operating
modes can be selected and adjusted sep-
arately on the left and right sides:
1Adjusting cooling
2Maximum cooling
3Adjusting air supply manually
4Switching off rear air conditioner
Switching on rear air conditioner
To switch on the rear air conditioner
>select maximum cooling 2
>press the OFF button 4 again
>in the Control Center, select "Rear air
cond." and confirm, refer to Switching
on/off using the Control Center.
When you switch on the rear air con-
ditioner, you simultaneously switch
on the rear cooler, refer to page 113.<
Adjusting cooling
You can also set the system to
provide the desired level of
cooling by turning. We recom-
mend setting the system for
moderate cooling. When you
start the vehicle, this system ensures that
the selected setting is achieved as quickly
as possible. It then maintains this tempera-
ture, regardless of the season.
Adjusting air supply manually
You can adjust the air supply by
turning.
Maximum cooling
This program quickly provides
maximum cooling.
The system automatically switches to the
recirculated-air mode while a high-speed
stream of air simultaneously emerges from
the vent outlets. For this reason you should
ensure that these outlets are open before
selecting this program.
Switching off rear air conditioner
The air conditioner is switched
off.
Press the button again to switch back on.

Controls
109Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Switching on/off using the Control
Center
1.With the ignition on, select "Climate"
2. Select the second page of the
"Climate" menu
3.Select "Extra" and confirm
4.Select "Rear air cond." and confirm.
The maximum cooling mode is auto-
matically activated when you switch
on the rear air conditioner in the Control
Center.<
Select "Rear air cond." again and confirm
to switch off the system.
Rear ventilation
Use the lever 1 to vary the airflow direction.
For additional information on rear ventila-
tion options, refer to page 105.
Independent ventilation
System operation is controlled using the
Control Center. You can set two different
times for the system to start.
The independent ventilation blows air into
the passenger compartment to lower inte-
rior temperatures.The system remains on for 30 minutes.
You can also switch the system on and off
manually. Since the system uses a sub-
stantial amount of electrical current, you
should refrain from activating it twice in
succession without allowing the battery to
be recharged in normal operation between
use.
The independent ventilation is available for
preprogrammed operation at outside tem-
peratures above approx. 597/156 and
for direct activation at any temperature, but
is not operational when the vehicle is
underway.
The air enters the passenger compartment
through the vent outlets in the instrument
panel, which can be adjusted for both
direction and airflow. These outlets must
be open for the system to operate.
Switching on and off directly
1.Switch on the radio mode
2.Select "Indep. ventil." on the second
page of the "Climate" menu and con-
firm.
Select "Indep. ventil." a second time and
confirm to deactivate the system manually.
Preselecting the switch-on time

Under the hood
196 The oil quantity between the two marks
of the dipstick is approx. 1.65 US quarts/
1.5 liter. Do not fill beyond the upper mark
on the dipstick. Excess oil can damage the
engine.
Adding engine oil
Wait until the level has dropped to just
above the lower mark or a message
appears in the Check Control before add-
ing oil.
BMW engines are designed to oper-
ate without additives, and their use
could even lead to damage in some cases.
This also applies to the automatic transmis-
sion, the differential and the power steering
system.<
Recommendation: have your oil changed
at your BMW center.
Continuous exposure to used oil has
caused cancer in laboratory testing.
For this reason, any skin areas that come
into contact with oil should be thoroughly
washed with soap and water.
Store oil, grease, etc., well out of the reach
of children; always observe all warning
labels on the containers. and regulations for environmental
protection when disposing of used oil.<
Specified engine oils
The quality of the engine oil selected has
critical significance for the operation and
service life of an engine. BMW approves
only specific oils after confirming their suit-
ability for use in its vehicles with extensive
testing.
Use only approved BMW High Perfor-
mance Synthetic Oil.
If you are unable to obtain BMW High Per-
formance Synthetic Oil, you can add small
amounts of another synthetic oil between
oil changes. Use only oils with the API SH
specification or higher.
Ask your BMW center for details con-
cerning the specific BMW High Per-
formance Synthetic Oil or synthetic oils
which have been approved.<
You can also call BMW of North America
at 1-800-831-1117 or visit this website:
www.bmwusa.com to obtain this informa-
tion.
Viscosity ratings
Viscosity is the oil flow rating as defined in
SAE classes.
The selection of the correct SAE class
depends on the climatic conditions in the
area where you typically drive your BMW.
Approved oils are in SAE classes
5W-40 and 5W-30.<
These oils may be used for driving in all
ambient temperatures.
Coolant
Do not add coolant to the cooling
system when the engine is hot.
Escaping coolant can cause burns.
Antifreeze and anticorrosion agents are
hazardous to health. Always store these
agents in tightly-closed original containers
kept well away from the reach of children.

Everything from A to Z
216
A
"ABC..." for
navigation 132, 133
ABS Antilock Braking
System 91
ACC, refer to Active cruise
control 73
"ACCEPT" for
navigation 136, 143
Accessories 6
Activated-charcoal
filter 108
"Activation time" 109
Active cruise control 73
Ð malfunctions 79
Ð selecting distance 76
Active head restraints,
front 47
Active seat 51
Active seat ventilation 50
Adapter for spare key 32
Adaptive Head Light 99
Adding engine oil 195
"Address book" 142
Adjusting cooling capacity
of rear air conditioner 108
Airbags 97
Air conditioner in the
rear 108
Air distribution 103, 106
Airing, refer to
Ventilation 105
Air pressure, refer to Tire
inflation pressure 188
Air supply 104
Ð rear air conditioner 108
Air vent outlets 102
AKI, refer to Fuel
specifications 187
Alarm system 39
Ð avoiding unintentional
alarms 40All-season tires 192
"AM..." 148, 152, 154
AM waveband 152
Anchorages 125
"ANGLE" for DVD
mode 168
Antifreeze 196
Ð washer fluid 71
Antifreeze protection
Ð coolant 196
Ð radiator 196
Antilock Braking System
ABS 91
Anti-theft alarm
system 33, 39
Approved gross vehicle
weight 214
Aquaplaning, refer to
Hydroplaning 122
"Arrow display" for
navigation 140
"AS ADDRESS"
Ð creating a directory 142
Ð current position 143
Ð destination
entry 132, 134, 135
Ð destination list 136
Ð home address 142
Ð last destinations 136
"AS DEST."
Ð creating a directory 142
Ð destination
entry 134, 135
Ð home address 142
Ð last destinations 136
"AS DESTINATION"
Ð creating a directory 142
Ashtray 115
Assistance window, refer to
Control Center 22
Ð help texts 22
Ð status lines 23AUC Automatic
recirculated-air
control 104
"Audio" 148, 152
Audio 148
Ð adjusting the tone 149
Ð controls 148
Ð switching on/off 149
Ð volume 149
"AUDIO" for DVD
mode 168
"AUTO", automatic climate
control 106
Automatic
Ð air distribution 103
Ð cruise control 71
Ð curb monitor 54
Ð headlamp control 99
Ð luggage compartment lid
control 34, 38
Ð steering wheel
adjustment 52
Automatic car wash, refer
to the Caring for your
vehicle brochure
Automatic climate
control 102
Ð automatic air
distribution 103
Ð rear air conditioner 108
Ð rear cooler 113
Ð settings in Control
Center 106
Automatic Hold
Ð parking 63
Ð parking brake 63
Automatic recirculated-air
control AUC 104
Automatic transmission
with Steptronic 66
Ð manual operation 67
Ð sport program 67
"AUTO P" 53, 63
Everything from A to Z
Index