2005 BMW 645CI COUPE&CONVERTIBLE fuel

Everything under control
70
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 mes-
sage appears on the Control Display.
Fuel gage
Fuel tank capacity: approx. 18.5 US gallons/
70 liters, including the reserve capacity of
approx. 2.1 gallons/8 liters. You can find infor-
mation on refueling on page166.
If the tilt of the vehicle varies for a longer period,
when you are driving in mountainous areas, for
example, the indicator may fluctuate slightly.
After the reserve quantity has been reached, a
message appears for a short time on the Con-
trol Display; the remaining range is shown in the
computer. Below a range of approx. 30 miles/
50 km, the message 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 requirements
The remaining distance to be driven and the
date for the next maintenance are briefly indi-
cated with the ignition key in position 2.
Your BMW Service Advisor will determine
your vehicle's current service require-
ments by reading out the data stored in the
master key.<
Additional information
You can view additional information on service
and maintenance procedures on the Control
Display.
Control Center, for principle details, refer to
page16.
1.Open the menu.
2.Select "Service" and press the controller.
3.Select "Service requirements" and press
the controller.
4.Select "Status" and press the controller.
The display shows a list of selected service and
maintenance procedures, as well as legally
mandated official inspections.

Everything under control
74
Computer
Requesting information
As of ignition key position 1, you can use the BC
button in the turn signal lever to call up com-
puter information in the instrument cluster.
A new function appears each time you press the
BC button.
In instrument cluster
The display sequence:
>Cruising range
>Average speed
>Average fuel consumption
Cruising range
Displays the estimated cruising range available
with the remaining fuel. It is projected by taking
into account the driving style over the last
20 miles/30 km.
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.<
Average speed
Periods with the vehicle parked and the engine
off are not included in the calculations of aver-
age speed.
To reset the average speed: press the BC but-
ton in the turn signal lever for approx. 2 sec-
onds.
Average fuel consumption
The average fuel consumption is calculated for
the time during which the engine is running.
You can use the Control Display to view your
fuel consumption rate over two different dis-
tances, refer to page75.
To reset the average fuel consumption: press
the BC button in the turn signal lever for approx.
2seconds.
On Control Display
You can also call up the computer via the Con-
trol Center, for principle details, refer to
page16.
1.Press the button.
This opens the start menu.
2.Move the controller to the right to open
"Navigation".
On vehicles without navigation system:
Open "Car Data".
3.Select "Car Data" and press the controller.
You can now choose between:
>Computer
>Trip computer,
suitable e.g. for a vacation trip

Controls
75Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Computer
Select "Onboard info" and press the controller.
>Estimated time of arrival at destination:
>Entering a distance manually in the com-
puter, see below.
>Entering a destination in the navigation
system
*, refer to page115.
>Cruising range
>Distance to destination:
>Entering a distance manually in the com-
puter, see below.
>Entering a destination in the navigation
system
*, refer to page115.
>Average speed
>Average fuel consumption
Trip computer
Select "Trip computer" and press the control-
ler.
>Departure time
>Driving time
>Distance traveled
>Average speed
>Average fuel consumptionStart or stop trip computer, or reset all values:
1.Select "Set" and press the controller.
2.Select the desired menu item.
3.Press the controller.
Entering a distance manually
Control Center, for principle details, refer to
page16.
1.Open "Navigation".
On vehicles without navigation system:
Open "Car Data".
2.Select "Car Data" and press the controller.
3.Select "Onboard info" and press the con-
troller.
4.Select "Distance to dest." and press the
controller.
5.Turn the controller to select the distance
to your destination. If necessary, hold it
against a slight resistance to enter a greater
difference.
6.Press the controller to apply the setting.
The distance is automatically predetermined
during the destination guidance of the naviga-
tion system
*.
Display options
You can display the computer or the trip com-
puter in the assistance window.
Control Center, for principle details, refer to
page16.

Telephoning
150
Telephoning
Safety notes
For your own safety
Your car phone makes life more convenient in
many ways, and can even save lives in an emer-
gency. While you should consult your portable
phone's separate Owner's Manual for a detailed
description of safety precautions and informa-
tion, we request that you direct your particular
attention to the following:
Adjustments
To avoid posing a danger to yourself and
other road users, never adjust the system
settings unless your vehicle is stationary.<
Using the phone in your vehicle
Using a portable phone while driving is
already illegal in many states and cities.
Always use your hands-free system, or stop
your vehicle in an area where you will not pose a
safety hazard to other road users.<
Vehicles and portable phones
Do not use your phone within a garage, or
near an open hood. The air in these areas
could contain fuel vapors, and the portable
phone might generate sparks that could result
in burns.
This same precaution applies to open luggage
compartment lids on vehicles equipped for
operation using natural gas or hydrogen, and to
all vehicles with luggage compartment-
mounted batteries.<
Antenna
When using the phone, ensure that all
persons in the area are at least 20 in/
50 cm from the antenna. Never use your porta-
ble phone if the antenna is damaged. Contact
between your skin and a damaged antenna can
result in minor burns.If the antenna is damaged, have it replaced
immediately.<
Special environmental conditions
Always switch off your portable phone in
areas where blasting work is being con-
ducted with explosives. The phone signals
could potentially act as a high-frequency trans-
mitter and set off explosions.
Always switch off your portable phone in areas
where an increased explosion danger is
present. This category includes gas stations
along with fuel and chemical storage depots,
etc., and all areas in which the air can contain
fuel, chemicals or metal particles. Under these
conditions, your portable phone could conceiv-
ably generate sparks that could lead to a fire or
explosion. Always observe all legal regulations
governing the use of portable phones in the
vicinity of gas stations, chemical factories and
other areas where an explosion potential exists.
Never use your portable phone in aircraft; do
not use this portable phone in hospitals, care
centers or at other locations where medical
equipment may be in operation, such as acci-
dent sites, etc.
Your wireless service provider can furnish you
with more detailed information on legal regula-
tions governing the use of your phone.<
Medical equipment
Portable phones can generate interfer-
ence capable of preventing hearing aids
and cardiac pacemakers from operating cor-
rectly. If you or any occupant of the vehicle use
such equipment, consult a physician or the
manufacturer of the equipment to determine
whether it is adequately shielded against high-
frequency energy.<
Batteries
Never attempt to dismantle your portable
phone or its battery. Use only approved
battery types – the wrong battery can destroy

Mobility
This section helps you maintain your mobility
by supplying important information on vital
topics including fuels and lubricants,
wheels and tires, service, maintenance
and breakdown assistance.
Mobility

Refueling
166
Refueling
Always switch off the engine before refu-
eling. If you do not, fuel cannot be dis-
pensed into the tank and a message on the
Control Display will appear.<
Always observe all applicable precautions
and regulations when handling fuels.
Never carry spare fuel containers in your vehi-
cle. Whether empty or full, these containers can
leak, cause an explosion, and lead to fire in the
event of a collision.<
Fuel filler door
To open and close: briefly press the rear edge of
the fuel filler door.
Manual release
In the event of an electrical malfunction in the
system, you can release the fuel filler door man-
ually:
In the luggage compartment, pull the knob with
the gas pump symbol on the right side panel.
Observe following when refueling
When handling fuels always observe any
safety guidelines posted at the gas sta-
tion.<
Put the fuel filler cap in the bracket attached to
the fuel filler door.
When refueling, insert the filler nozzle com-
pletely into the filler pipe. Lifting the filler nozzle
during refueling
>results in premature pump shutoff
>can lead to reduced efficiency in the fuel-
vapor recovery system
The fuel tank is full when the filler nozzle clicks
off the first time.
Fuel tank capacity
Approx. 18.5 US gallons/70 liters, including the
reserve capacity of approx. 2.1 gallons/8 liters.
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.<
Closing fuel filler cap
Fit the cap and turn it clockwise until you clearly
hear a click.
Close the fuel filler cap carefully after
refueling, continuing until a click is heard.
While closing, be sure not to squeeze the strap
which is fastened to the cap. A loose or missing
cap will activate an indicator lamp and the mes-
sage Check Gas Cap
* on the Control Display.<

Mobility
167Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Fuel specifications
The engine uses unleaded gasoline only.
Required fuel
Premium unleaded gasoline
The minimum octane rating is 91.
If you use gasoline with this minimum octane
rating, the engine may produce knocking
sounds when starting at high outside tempera-
tures. This has no effect on the engine life.
Minimum Octane Rating corresponds to the
Anti Knock Index AKI and is determined accord-
ing to the so-called (R+M)/2 method.
Do not use leaded gasoline, as otherwise
the lambda probe and catalytic converter
will be permanently damaged.<
Use high-quality brands
Field experience has indicated significant dif-
ferences in fuel quality: volatility, composition,
additives, etc., among gasolines offered for sale
in the United States and Canada. Fuels contain-
ing 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
equivalent amount of co-solvent, will not void
the applicable warranties with respect to
defects in materials or workmanship.
The use of poor-quality fuels may result in
drivability, starting and stalling problems,
especially under certain environmental condi-
tions 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 recommendations
may also result in unscheduled maintenance.<

Mobility
173Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Run-flat tires
If you switch from summer to winter tires, or
vice versa, use run-flat tires, refer to page172,
as in the event of a flat tire there is no spare tire
available. Your BMW center will be glad to
advise you.
Watch speed
Observe the permissible maximum speed
for the respective winter tires, as other-
wise tire damage and occur and cause acci-
dents.<
Storage
Always store wheels and tires in a cool, dry
place with as little exposure to light as possible.
Always protect tires against all contact with oil,
grease and fuels. Do not exceed the maximum
tire inflation pressure indicated on the side wall
of the tire.
Snow chains*
BMW only tests certain fine-link snow chains,
classifies them as road-safe and approves
them. Consult your BMW center for more infor-
mation. BMW recommends using these
approved snow chains. These snow chains are
approved exclusively for use in pairs on the rear
wheels with the tire size:
>245/50 R 17 Y
>245/45 R 18 Y
Observe the chain manufacturer's instructions
when mounting snow chains. Do not exceed a
vehicle speed of 30 mph/50 km/h with the
chains mounted.
Do not initialize the Flat Tire Monitor after
mounting snow chains.
When you are driving with snow chains, it can
be beneficial to switch off DTC briefly, refer to
page82.<