2004 BMW 645CI COUPE maintenance

645CiOwner's Manual for Vehicle
Congratulations, and thank you for choosing a BMW.
Thorough familiarity with your vehicle will provide you
with enhanced control and security when you drive it.
We therefore have this request:
Please take the time to read this Owner's Manual and
familiarize yourself with the information that we have com-
piled for you before starting off in your new vehicle. It con-
tains important data and instructions intended to assist you
in gaining maximum use and satisfaction from your BMW's
unique range of technical features. The manual also con-
tains information on maintenance designed to enhance
operating safety and contribute to maintaining the value of
your BMW throughout an extended service life.
This Owner's Manual should be considered a permanent
part of this vehicle. It should stay with the vehicle when
sold to provide the next owner with important operating,
safety and maintenance information.
This manual is supplemented by a Service and Warranty
Information Booklet for US models or a Warranty and
Service Guide Booklet for Canadian models.
We wish you an enjoyable driving experience.
BMW AG

Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Contents
The fastest way to find specific topics is
to use the index, refer to page 197.
Using this Owner's Manual
4Notes
7Reporting safety defects
At a glance
10Cockpit
16Control Center
20Voice command system
Controls
26Opening and closing
42Adjustments
51Transporting children safely
54Driving
64Everything under control
75Technology for comfort, convenience
and safety
85Lamps
88A congenial climate
94Practical interior accessories
Driving tips
102Things to remember when driving
Navigation
108Starting navigation system
110Destination entry
118Destination guidance
122What to do if …
Entertainment
126On/off and tone
130Radio
137CD player and CD changer
Communications
144Telephoning
155TeleService, BMW Assist
Mobility
162Refueling
164Wheels and tires
170Under the hood
174Maintenance
176Rules and regulations
178Replacing components
183Giving and receiving assistance
Reference
190Technical data
194Short commands of the
voice command system
197Everything from A to Z

Notes
6
For your own safety
Fuels
Use unleaded gasoline only.
Fuels containing up to and including
10 % ethanol or other oxygenates with
up to 2.8 % oxygen by weight – that is,
15 % MTBE or 3 % methanol plus an equiv-
alent amount of co-solvent – will not void
the applicable warranties with respect to
defects in materials or workmanship. Field
experience has indicated significant differ-
ences in fuel quality – volatility, composi-
tion, additives, etc. – among gasolines
offered for sale in the United States and
Canada. The use of poor-quality fuels may
result in drivability, starting and stalling
problems, especially under certain environ-
mental conditions such as high ambient
temperature and high altitude.
Should you encounter drivability problems
which you suspect could be related to the
fuel you are using, we recommend that you
respond by switching to a recognized high-
quality brand.
Failure to comply with these recommenda-
tions may result in unscheduled mainte-
nance.
Follow the relevant safety rules when you
are handling gasoline.<
Maintenance and repair
Advanced technology, e. g. the use of
modern materials and high-perfor-
mance electronics, requires specially
adapted maintenance and repair methods.
Therefore, only have corresponding work
on your BMW carried out by a BMW center
or a workshop that works according to
BMW repair procedures with correspond-
ingly trained personnel. If work is carried
out improperly there is a danger of conse-
quential damage and the related safety
risks.<
Parts and accessories
For your own safety, use genuine
parts and accessories approved by
BMW.
When you purchase accessories tested
and approved by BMW and Genuine BMW
Parts, you simultaneously acquire the
assurance that they have been thoroughly
tested by BMW to ensure optimum perfor-
mance when installed on your vehicle.
BMW warrants these parts to be free from
defects in material and workmanship.
BMW will not accept any liability for dam-
age resulting from installation of parts and
accessories not approved by BMW.
BMW cannot test every product made by
other manufacturers to verify if it can be
used on a BMW safely and without risk to
either the vehicle, its operation, or its occu-
pants.
Genuine BMW Parts, BMW Accessories
and other products approved by BMW,
together with professional advice on using
these items, are available from all BMW
centers.
Installation and operation of non-BMW
approved accessories such as alarms,
radios, amplifiers, radar detectors, wheels,
suspension components, brake dust
shields, telephones – including operation of
any portable phone from within the vehicle
without using an externally mounted
antenna – or transceiver equipment, for
instance, CBs, walkie-talkie, ham radio or
similar accessories, may cause extensive
damage to the vehicle, compromise its
safety, interfere with the vehicle's electrical
system or affect the validity of the BMW
Limited Warranty. Refer to your BMW cen-
ter for additional information.<
Maintenance, replacement, or repair
of the emission control devices and
systems may be performed by any automo-
tive repair establishment or individual using
any certified automotive part.<

Control Center
16
Control Center
The Control Center groups the functions of
a large number of switches. This means
that these functions can be operated from
a central position. The following section
provides an introduction to the principle of
the menu guidance. How you control the
individual functions is described in the con-
text of the relevant equipment.
Controls
1Controller: you navigate through the
menus of the Control Center and make
adjustments by turning, pressing and
moving it to the left, right, forwards or
backwards
2The start menu can be opened from any
menu with this button
3Control Display
When you turn the controller, you feel a
clicking. This helps you to select the
desired menu item.To avoid posing an unnecessary haz-
ard due to inattention, both to your
own vehicle's occupants and to other road
users: never attempt to use the controls or
make entries unless traffic and road condi-
tions allow.<
Menu overview
You can call up all the functions in the
Control Center using five menu items.
Communication
>Portable phone
>BMW Assist or TeleService.
Navigation or onboard information
>Navigation system
>Onboard information, e.g. for display of
the average fuel consumption.
Entertainment
>Radio
>CD player and CD changer.
Climate
>Air distribution
>Independent ventilation.
menu
>Switching off the Control Display
>Traffic information
>Tone and display settings
>Settings for your vehicle, e.g. for central
locking or settings for entertainment or
your portable phone
>Display of the maintenance requirement
and dates for statutory emission and
vehicle inspections.

Controls
65Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Engine oil thermometer
The engine oil temperature is between
approx. 1607/706 and approx. 3407/
1706 during normal operation.
If the engine oil temperature is too high, a
message appears on the Control Display.
Fuel gauge
Fuel tank capacity: approx. 18.5 US gal-
lons/70 liters, including the reserve capac-
ity of approx. 2.1 gallons/8 liters. You can
find information on refueling on page 162.
If the tilt of the vehicle varies for a longer
period, when you are driving in mountain-
ous areas, for example, the indicator may
fluctuate slightly.
After the reserve quantity has been
reached, a message appears for a short
time on the Control Display; the remaining
range is shown in the computer. Below a
range of approx. 30 miles/50 km, the mes-
sage remains on the Control Display.
Refuel as soon as possible once your
cruising range falls below 30 miles/
50 km, as otherwise engine functions are
not ensured and damage can occur.<
Service requirement display
In instrument cluster
The remaining distance to be driven, the
date for the next maintenance as well as
the date entered for the state emission or
vehicle inspection are displayed briefly as
of ignition key position 2, if the date is
imminent.
Your BMW Service Advisor will deter-
mine your vehicle's current service
requirements by reading out the data
stored in the vehicle key.<
On Control Display
You can view additional information on ser-
vice and maintenance procedures on the
Control Display.
Control Center, for principle details, refer to
page 16:
1.Open the menu
2.Select "Service" and press the control-
ler
3.Select "Service requirements" and
press the controller
4.Select "Status" and press the control-
ler.
The display shows a list of selected service
and maintenance procedures, as well as
legally mandated official inspections.

Technology for comfort, convenience and safety
78 The laws of physics cannot be
repealed, even with DSC. An appro-
priate driving style always remains the
responsibility of the driver. Therefore, do
not reduce the additional safety margin
again by taking risks.<
DBC Dynamic Brake Control
When you apply the brakes rapidly, this
system automatically produces the maxi-
mum braking force boost and thus helps to
achieve the shortest braking distance dur-
ing panic stops. This system exploits all of
the benefits provided by ABS.
Do not reduce the pressure on the brake
pedal for the duration of the brake applica-
tion. When the brake pedal is released,
DBC is deactivated.
Malfunctions of 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 Display. Driving stability
control and ABS have failed. Con-
ventional braking efficiency remains
available without limitations.
While you may continue, you should
remember to proceed cautiously and drive
defensively while avoiding full brake appli-
cations.
Have the system checked as soon as pos-
sible.
Display of the previously described
malfunction on Canadian models.
The DSC warning lamp lights up.
DSC and DTC have failed.
The stability maintenance functions
are no longer available. The vehicle will
remain completely operational, however,
without DSC.Have the system checked as soon as pos-
sible.
The warning lamp for the brake sys-
tem lights up yellow and a message
appears on the Control Display.
DBC has failed.
Have the system checked as soon as pos-
sible.
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 cor-
nering and evasive maneuvers.
Dynamic stabilizers at the front and rear
axles form the basis for active roll stabiliza-
tion. Suspension compliance adapts to suit
driving conditions, varying from perfor-
mance-oriented during cornering to
smooth and comfort-oriented when the
vehicle is proceeding in a straight line. Dur-
ing vehicle operation, the system continu-
ously 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
message 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 ten-
dency to tilt during cornering and in cross-
winds.
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

Controls
83Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Never move the convertible top when
the rollover protection system is
raised.
No changes of any nature may be made to
the individual components of the rollover
protection system and wiring.
Work on the rollover protection system may
only be performed at a BMW center.
Unprofessional attempts to service the sys-
tem can lead to failure or malfunction.
For a system check and to ensure long-
term functioning, you must comply with the
maintenance intervals of the service
requirement display.<
Head-Up Display*
The concept
With the Head-Up Display important infor-
mation is projected into the driver's field of
view, e.g. navigation instructions. This
enables you to take in this information with-
out looking away from the road.
Switching on/off
Ignition key in position 2:
Press the button to activate or deactivate
this system.1Navigation instructions
2Display for cruise control
3Speed
Selecting displays
Control Center, for principle details, refer to
page 16:
1.Press button.
The start menu is opened
2.Press the controller to open the menu
3.Select "Display settings" and press the
controller
4.Select "HUD selection" and press the
controller
5.Select desired information of Head-Up
Display

A congenial climate
92 climate control is optimized for driving with
the convertible top open. In addition, the air
supply is increased as the speed increases.
If the convertible program has been
selected, it is automatically active every
time the top is opened.
The effect of the convertible program
can be greatly enhanced if the wind
deflector is fitted.<
Ventilation
You can use the serrated dials 1 to open
and close the vent outlets through an infi-
nitely-variable range, while the levers 2
allow you to adjust the airflow direction.
Do not drop any foreign bodies into
the vent outlets, as otherwise these
could be catapulted outwards and lead to
injuries.<
Ventilation for cooling
Adjust the vent outlets to direct the flow of
cool air in your direction, for instance, if the
interior 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.
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 requirement dis-
play, refer to page 65.
Independent ventilation
The independent ventilation blows air into
the passenger compartment to lower inte-
rior temperatures.
The independent ventilation is controlled
using the Control Center. You can set two
different times for the system to start.
The independent ventilation remains on for
30 minutes. It can also be switched on and
off directly. 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 ready for
use at any outside temperature up to igni-
tion key position 1.
The air emerges through the upper body
region vent outlets in the instrument panel.
These vent outlets must be open for the
system to operate.
Switching on and off directly
Control Center, for principle details, refer to
page 16:
1.Open "Climate"
2.Select "Ventilation" and press the con-
troller
3.Select "Automatic ventilation" and
press the controller
4.Select "Parked car ventilation" and
press the controller.