2008 BMW 328I CONVERTIBLE fuel consumption

At a glance
17Reference
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Menu overview
Communication
>Telephone*
>BMW Assist* or TeleService*
Navigation
>Navigation system
>Onboard information, e.g. for displaying the
average fuel consumption
Entertainment
>Radio
>CD player and CD changer
*
>AUX-In port, USB-audio interface* for
external audio device
Climate
>Vent settings
>Automatic programs
>Parked car operation
menu
>Switching off Control Display
>Tone and display settings
>Settings for your vehicle, e.g. for the central
locking system
>Display of service requirements and dates
for statutory inspections
>Settings for telephone
Operating principle
As of radio readiness, the following message
appears on the Control Display:
To hide the message:
Press the controller.
The start menu is displayed.
The message is automatically hidden after
approx. 10 seconds.
Start menu
All iDrive functions can be called up via five
menu items.
Opening start menu
Press the button.
To open the start menu from the menu:
Press the button twice.

Controls
29Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
>Settings for the display on the Control Dis-
play and in the instrument cluster:
>12h/24h format of the clock, refer to
page82
>Date format, refer to page83
>Brightness of the Control Display, refer
to page86
>Language on the Control Display, refer
to page86
>Units of measure for fuel consumption,
distance covered/remaining distances,
and temperature, refer to page78
>Show visual warning for Park Distance Con-
trol PDC
*, refer to page88
>Light settings:
>Welcome lamps, refer to page100
>Pathway lighting, refer to page101
>Daytime running lamps, refer to
page101
>Automatic climate control: activating/deac-
tivating AUTO program, cooling function
and automatic recirculated-air control, set-
ting temperature, air flow rate and distribu-
tion, refer to page105 ff
>Entertainment:
>Audio volume, refer to page161
>Tone control, refer to page161
>Speed-dependent volume control, refer
to page161
Central locking system
The concept
The central locking system is ready for opera-
tion whenever the driver's door is closed.
The system simultaneously engages and
releases the locks on the following:
>Doors
>Luggage compartment lid
>Fuel filler door
> Convertible: center armrest and glove com-
partment
Operating from outside
>Via the remote control
>Via the door lock
>In cars with convenient access
*, via the
handles on the driver's and front passen-
ger's doors
The anti-theft system is also operated at the
same time. It prevents the doors from being
unlocked using the lock buttons or door han-
dles. In addition, if the remote control is used,
the welcome lamps, interior lamps and the
door's courtesy lamps
* are switched on or off.
The alarm system
* is also armed or disarmed.
For further details of the alarm system,
refer to
page35.
Operating from inside
By means of the button for central locking, refer
to page32.
In the event of a sufficiently severe accident, the
central locking system unlocks automatically. In
addition, the hazard warning flashers and inte-
rior lamps come on.
Opening and closing:
Using the remote control
Persons or animals in a parked vehicle
could lock the doors from the inside. You
should therefore take the remote control with
you when you leave the vehicle so that the latter
can be opened from outside.<
Convertible: to operate the retractable
hardtop with the remote control, the
doors and luggage compartment lid must be
closed and the cargo bay partition must be
folded down and engaged on both sides. Refer
also to page41.<
Unlocking
Press the button.
The interior lamps, the courtesy lamps
* and the
welcome lamps come on.

Controls
75Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Coolant temperature
A warning lamp will come on if the coolant, and
therefore the engine, becomes too hot. In addi-
tion, a message will appear on the Control Dis-
play.
Check coolant level, refer to page228.
Engine oil temperature*
When the engine is at normal operating temper-
ature, the engine oil temperature is between
approx. 2107/1006 and approx. 3007/
1506.
If the engine oil temperature is too high, a mes-
sage appears on the Control Display.
Fuel gauge
Fuel tank capacity: approx. 15.9 US gallons/
60 liters.
You can find information on refueling on
page210.
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.
Reserve
Once the fuel level has fallen to the reserve
zone, a message briefly appears on the Control
Display and the cruising range for the remaining
amount of fuel is displayed on the computer.
Under a cruising range of approx. 30 miles/
50 km, the message remains in the Control Dis-
play.
Refuel as soon as possible once your
cruising range falls below 30 miles/
50 km, otherwise engine functions are not
ensured and damage can occur.<
Computer
Displays in the instrument cluster
Calling up information
Press the button in the turn indicator lever.
The following items of information are dis-
played in the order listed:
>Cruising range
>Average speed
>Average fuel consumption
>Current fuel consumption
*
>No information
To set the corresponding units of measure,
refer to Units of measure on page78.
Cruising range
Displays the estimated cruising range available
with the remaining fuel. The range is calculated
on the basis of the way the car has been driven
over the last 18 miles/30 km and the amount of
fuel currently in the tank.

Everything under control
76 Refuel as soon as possible once your
cruising range falls below 30 miles/
50 km, otherwise engine functions are not
ensured and damage can occur.<
Average speed
Periods with the vehicle parked and the engine
switched off are not included in the calculations
of average speed.
With the trip computer, refer to page77, you
can have the average speed for another trip dis-
played.
To reset average speed: press the button in the
turn indicator lever for approx. 2 seconds.
Average fuel consumption
The average fuel consumption is calculated for
the time during which the engine is running.
With the trip computer, refer to page77, you
can have the average consumption for another
trip displayed.
To reset average fuel consumption: press the
button in the turn indicator lever for approx.
2seconds.
Current fuel consumption
Displays the current fuel consumption. This
allows you to see whether your current driving
style is conducive to fuel economy with mini-
mum exhaust emissions.
Displays on the Control Display
You can also call up the computer via iDrive; for
operating principle refer to page16.
1.Press the button.
This opens the start menu.
2.Move the controller to the right to call up
"Navigation".
3.If necessary, move the highlight marker to
the uppermost field. Turn the controller until "Car Data" is selected and press the
controller.
4.Select "Onboard info" and press the con-
troller.
>Estimated time of arrival at destination:
>Manually enter a distance in the com-
puter, refer to information further below
>Enter a destination in the navigation sys-
tem, refer to page134
>Cruising range
>Distance to destination:
>Manually enter a distance in the com-
puter, refer to information further below
>Enter a destination in the navigation sys-
tem, refer to page134
>Average speed
>Average fuel consumption
Resetting values
You can reset the values for average speed and
average consumption:
1.Select the respective menu item and press
the controller.
2.Press the controller again to confirm your
selection.

Controls
77Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Entering a distance manually
1.Select "Distance to dest." and press the
controller.
2.Turn the controller to select the distance to
your destination.
3.Press the controller to apply the setting.
The distance is automatically entered during
destination guidance.
Trip computer
The trip computer is suitable e.g. for a holiday
trip.
1.Open the start menu.
2.Call up "Navigation".
3.Select "Car Data" and press the controller.
4.Select "Trip computer" and press the con-
troller.
>Departure time
>Driving time
>Distance traveled
>Average speed
>Average fuel consumption
Switching trip computer on/off and resetting all
values to zero:1.Select "Set" and press the controller.
2.Select the desired menu item and press the
controller.
Display options
You can display the computer or the trip com-
puter in the assistance window.
1.Move the controller to the right to change to
the assistance window and press the con-
troller.
2.Select a menu item:
>"Onboard info"
>"Trip computer"
3.Press the controller.

Things to remember when driving
124
Things to remember when driving
Break-in period
Moving parts need breaking-in time to adjust to
each other. Please follow the instructions below
in order to achieve the optimal service life and
economy of operation for your vehicle.
Engine and differential
Always obey all official speed limits.
Up to 1,200 miles/2,000 km
Drive at varying engine and road speeds, but do
not exceed an engine speed of 4500 rpm or a
road speed of 100 mph/160 km/h.
Avoid full-throttle operation and use of the
transmission's kick-down mode.
After driving 1,200 miles/2,000 km
Engine and vehicle speeds can be gradually
increased.
Tires
Due to technical factors associated with their
manufacture, tires do not achieve their full trac-
tion potential until after an initial break-in
period. Therefore, drive cautiously during the
first 200 miles/300 km.
Brake system
Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve optimized
contact and wear patterns between brake pads
and rotors. Drive cautiously during this break-in
period.
Clutch
The function of the clutch reaches its optimal
level only after a distance driven of approx.
300 miles/500 km. During this break-in period,
engage the clutch gently.
Following part replacement
The same break-in procedures should be
observed if any of the components mentioned
above have to be renewed in the course of the
vehicle's operating life.
Saving fuel
The fuel consumption of your vehicle depends
on several factors. You can lower fuel consump-
tion and the environmental impact by taking
certain measures, adjusting your driving style
and having the vehicle serviced regularly.
Remove any unneeded cargo
Additional weight increases fuel consumption.
Remove any mounted parts after you
have finished using them
Remove unneeded additional mirrors, the roof
rack and the rear luggage rack after use.
Mounted parts affect the vehicle's aerodynam-
ics and increase fuel consumption.
Close the windows and glass roof
An open glass roof or window causes higher air
resistance and thus increases fuel consump-
tion.
Check tire inflation pressure regularly
Check the tire inflation pressure at least twice a
month and before embarking on a long journey,
and correct it if necessary.
Low tire inflation pressure causes higher rolling
resistance and thus increases fuel consumption
and tire wear.
Set off immediately
Do not let the engine warm up while the car is
still standing, but set off immediately at moder-
ate engine speed. This is the fastest way for the
cold engine to reach its operating temperature.

Driving tips
125Reference
At a glance
Controls
Communications
Navigation
Entertainment
Mobility
Drive defensively
Avoid unnecessary acceleration and braking
maneuvers. To do so, keep an adequate dis-
tance to the forward vehicle. A defensive and
smooth driving style keeps fuel consumption
down.
Avoid high engine speeds
Only use first gear when setting off. In second
and higher gears, accelerate without hesitation
or pauses. When accelerating, shift up before
reaching high engine speeds.
When you reach the desired speed, shift into
the highest applicable gear and drive with the
engine speed as low as possible and at a con-
stant speed.
As a rule: driving at low engine speeds lowers
fuel consumption and reduces wear.
Coasting
When approaching a red light, take your foot off
the accelerator and coast to a stop in the high-
est applicable gear.
O n a d o w n h il l s lo p e , t a k e y o u r f o o t o f f t h e a c c el -
erator and coast in a suitable gear.
The fuel supply is interrupted when coasting.
Switch off the engine during lengthy
stops
Switch off the engine when stopping for lengthy
periods, e.g. at traffic lights, railroad crossings
or in traffic congestions. You achieve fuel sav-
ings even if standing time is as short as approx.
4 seconds.
Switch off functions you do not need at
the moment
Functions such as the air conditioner and the
seat or rear window heating draw large amounts
of power and consume additional fuel. Espe-
cially in city traffic and in stop and go driving
they have a considerable impact. Therefore,
switch these functions off when they are not
really needed.
Have the vehicle serviced
Have the vehicle serviced regularly to achieve
good economy and a long vehicle life. BMW
recommends having the vehicle serviced at a
BMW center. Also note the BMW service sys-
tem, refer to page229.
General driving notes
Close the luggage compartment lid
Operate the vehicle only when the lug-
gage compartment lid is closed. Other-
wise, exhaust fumes could enter the interior of
the vehicle.<
If the vehicle must be driven with the luggage
compartment lid open:
1.Close all windows and the glass roof.
2.Greatly increase the air volume of the auto-
matic climate control system, refer to
page106.
Hot exhaust system
In all vehicles, extremely high tempera-
tures are generated in the exhaust sys-
tem. Do not remove the heat shields installed
adjacent to various sections of the exhaust sys-
tem, and never apply undercoating to them.
When driving, standing at idle and while park-
ing, 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, with the
risk of serious personal injuries and property
damage. Do not touch hot exhaust tail pipes.
Otherwise there is a risk of burns.<
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 sur-
face. This situation, known as hydroplaning,
means that the tire can completely lose contact
with the road surface, so that neither the car can
be steered nor the brake be properly applied.<

Reference 253
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Automatic
– air distribution106
– air flow rate106
– cruise control66,67
– headlamp control100
– service notification203
– storing of stations165
Automatic climate control104
– automatic air
distribution106
– settings via iDrive105
Automatic curb monitor53
"Automatic programs" with
automatic climate
control106
Automatic recirculated-air
control AUC106
Automatic station search165
Automatic transmission with
Steptronic61
– interlock61,62
– overriding selector lever
lock63
– shiftlock, refer to Changing
selector lever position62
– sport program62
– towing238
– tow-starting238
"Automatic ventilation"108
AUTO program for automatic
climate control106
"Auto Request"203
"Autostore"
– on the radio166
"AUX"160,179,181
– AUX-In port179
– USB-audio interface180
AUX-IN
– port114
AUX-In port179
Average fuel consumption76
– setting the units78
Average speed76
"Avoid ferries" in
navigation145
"Avoid highways" in
navigation145
Avoid highways in
navigation145Avoiding unintentional
alarms36
"Avoid tollroads" in
navigation145
Axle loads, refer to
Weights247
"A - Z"193
,194
B
Backrest contour, refer to
Lumbar support47
Backrests, refer to Seat
adjustment46
Backrest width adjustment47
Back seats
– refer to Rear seats48
Backup lamps
– replacing bulb233
Backup lamps, refer to Tail
lamps233
Bag holder118
Balance, tone control161
Band-aids, refer to First-aid
pouch237
Bar, refer to Towing
methods239
Base plate for telephone or
mobile phone
– refer to Snap-in adapter in
the center armrest storage
compartment114
Bass, tone control161
Bass sounds, refer to Treble
and bass161
Battery235
– charging235
– disposal38,235
– jump starting237
– remote control28
– temporary power failure235
Battery renewal
– remote control38
– remote control for vehicle38
Being towed239
Belt hand-over52
– pinch protection system52
Belts, refer to Safety belts51Belt tensioner, refer to Safety
belts51
Beverage holders, refer to
Cup holders115
Blinds, refer to Roller sun
blinds113
Blower, refer to Air flow
rate106
Bluetooth, refer to separate
Owner's Manual
"BMW Assist"202,203,204
BMW Assist
– activating206
– Concierge service204
– contacting BMW Customer
Relations204
– Roadside Assistance202
– services offered201
– TeleService203
"BMW Contact"196
"BMW Contact
Numbers"196
BMW Homepage4
BMW Maintenance
System229
"BMW Service settings"207
BMW webpage4
Bottle holders, refer to Cup
holders115
Brake assist, refer to Dynamic
Brake Control DBC89
Brake fluid, refer to Service
requirements79
Brake Force Display96
Brake lamps
– replacing bulb233
– two-stage96
Brake pads124
– breaking in124
Brake rotors126
– brakes124
– breaking in124
Brakes
– ABS89
– BMW Maintenance
System229
– breaking in124
– parking brake60
– service requirements79