2012 BMW 128I fuel consumption

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
page76
>Date format, refer to page78
>Brightness of the Control Display, refer
to page81
>Language of the Control Display, refer to
page81
>Units of measure for fuel consumption,
distance covered/remaining distances,
and temperature, refer to page74
>Show visual warning for Park Distance Con-
trol PDC, refer to page82
>Light settings:
>Welcome lamps, refer to page94
>Pathway lighting, refer to page95
>Daytime running lights, refer to page95
>High-beam Assistant
*, refer to page96
>Automatic climate control: activating/deac-
tivating AUTO program, cooling function
and automatic recirculated air control, set-
ting temperature, air volume and distribu-
tion, refer to page100 ff
>Entertainment:
>Tone control, refer to page144
>Speed-dependent volume control, refer
to page144
Central locking system
The concept
The central locking system functions when the
driver's door is closed.
The system simultaneously engages and
releases the locks on the following:
>Doors
>Trunk lid
>Fuel filler flap
Operating from outside
>Via the remote control
>Via the door lock
*
>In cars with Comfort Access*, via the han-
dles on the driver's and front passenger
doors
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 on the alarm system
*, refer
to page34.
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 convertible
top with the remote control, the doors and
trunk lid must be closed and the cargo area par-
tition must be folded down and engaged on
both sides. Refer also to page42.<
Unlocking
Press the button.
The interior lamps, the courtesy lamps
* and the
welcome lamps come on.
Setting unlocking characteristics
You can set whether only the driver's door or
the entire vehicle is to be unlocked when the
button is pressed for the first time.

Controls
71Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
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. 14 US gal/53 liters.
You can find information on refueling on
page206.
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.
Fuel display 135i: in speedometer.
Reserve
Once the fuel level has fallen to the reserve
zone, a message briefly appears on the Control
Display and the remaining cruising range is dis-
played on the computer. Under a cruising range
of approx. 30 miles/50 km, the message
appears continuously in the Control Display.With a dynamic driving style, e.g. rapid corner-
ing, engine functions are not always assured.
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 signal/high beam
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 page74.

Controls overview
72
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.
It is important that you refuel as soon as
possible once your cruising range falls
below 30 miles/50 km; otherwise, engine func-
tions 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 page73, you
can have the average speed for another trip dis-
played.
To reset average speed: press the button in the
turn signal/high beam lever for approx.
2seconds.
Average fuel consumption
The average fuel consumption is calculated for
the time during which the engine is running.
With the trip computer, refer to page73, you
can have the average consumption for another
trip displayed.
To reset average fuel consumption: press the
button in the turn signal/high beam lever for
approx. 2 seconds.
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
The computer can also be opened via iDrive.
1."Vehicle Info"
2."Onboard info" or "Trip computer"Displaying "Onboard info":
>Cruising range
>Distance from destination
>Estimated time of arrival if a destination has
been entered in the navigation system
*,
refer to page125.
Displaying "Trip computer":
>Departure time
>Trip duration
>Trip distance
Both displays show:
>The average speed and
>the average fuel consumption.

Controls
73Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Resetting the fuel consumption and
speed
You can reset the values for average speed and
average consumption:
1.Select the respective menu entry.
2.Press the controller again to confirm your
selection.
Resetting the trip computer
You can reset all values:
1."Vehicle Info"
2."Trip computer"
3."Reset"
Settings and information
Operating principle
1Button for:
>Selecting display
>Setting values
2Button for:
>Confirming selected display or set val-
ues
>Calling up computer information71
3When the lights are on: instrument lighting
brightness98
4Calling up Check Control785Checking oil level217
6Setting the time76
7Setting the date78
8Viewing service requirement display74
Exiting displays
The outside temperature reading and the time
reappear when you press button2 or if you
make no entries within approx. 15 seconds. If
required, complete the current setting first.

Controls overview
74
Units of measure
You can change the units for fuel consumption,
route/distance, temperature and pressure.
1."Settings"
2."Language/Units"
3.Select the desired menu item.
4.Select the desired unit.
The settings are stored for the remote control
currently in use.
Service requirements
The remaining driving distance and the date of
the next scheduled service are displayed briefly
immediately after you start the engine or switch
on the ignition.
The extent of service work required can
be read out from the remote control by
your BMW Service Advisor.<
For certain maintenance operations, you can
view the respective distance remaining or due
date individually in the instrument cluster.1.Switch on the ignition, refer to page57.
2.Push button1 in the turn signal/high beam
lever up or down repeatedly until the appro-
priate symbol appears in the display,
accompanied by the words "SERVICE-
INFO".
3.Press button2.
4.Use button1 to scroll through the individual
service items.

Things to remember when driving
116
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 4,500 rpm or a
road speed of 100 mph/160 km/h.
Avoid full-throttle operation and use of the
transmission's kickdown 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
117Reference
At a glance
Controls
Communications
Navigation
Entertainment
Mobility
Drive defensively
Avoid unnecessary acceleration and braking
maneuvers. To do so, keep an adequate dis-
tance between you and the vehicle in front of
you. A defensive and smooth driving style
keeps fuel consumption down.
Avoid high engine speeds
Use first gear only for driving 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.
On a downhill slope, take your foot off the accel-
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.
4seconds.
Switch off functions you do not need at
the moment
Functions such as the air conditioner, seat
heating or rear window defroster draw large
amounts of power and consume additional fuel.
Especially in city traffic and in stop-and-go driv-
ing 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 page221.
General driving notes
Close the trunk lid
Only drive with the trunk closed. Failure to
do so may endanger passengers or other
road users or may damage the vehicle in the
event of an accident or a braking and evasive
maneuver. In addition, exhaust gas may flow
into the passenger compartment.<
If special circumstances make it absolutely nec-
essary to drive with the trunk open:
1.Close all windows and the glass roof.
2.Greatly increase the air volume of the auto-
matic climate control system, refer to
page101.
3.Drive cautiously.
Hot exhaust system
In all vehicles, extremely high tempera-
tures are generated in the exhaust sys-
tem. Do not remove the heat shields installed in
its vicinity, 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, 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

Everything from A to Z
254
Everything from A to Z
Index
A
ABS Antilock Brake
System83
Acceleration assistant, refer to
Launch Control66
Accessories, refer to Your
individual vehicle5
Accident, reporting, refer to
Emergency Request234
Activated-charcoal filter102
Active steering89
Adaptive Light Control95
Additives
– coolant219
– engine oil219
Address, entering125,131
Address for navigation
– entering125
Adjusting temperature100
Airbags90
– sitting safely45
– warning lamp92
Air conditioner99
Air distribution
– automatic100
Airing, refer to Ventilation102
Air outlets, refer to Air
vents99
Air pressure, checking, refer
to Tire inflation
pressure208
Air recirculation, refer to
Recirculated air mode101
Air vents99
Air volume101
AKI, refer to Fuel grade207
Alarm system34
– avoiding unintentional
alarms35
– interior motion sensor35
– switching off an alarm34
– tilt alarm sensor35Albums of music
collection163
ALL program101
All-season tires, refer to
Winter tires215
AM, waveband147
Ambient air, refer to
Recirculated air mode101
Antifreeze
– coolant219
– washer fluid68
Antilock Brake System
ABS83
Anti-theft alarm system, refer
to Alarm system34
Anti-theft system29
Appointments, refer to
Calendar193
Approved axle loads, refer to
Weights245
Approved engine oils219
Approved gross vehicle
weight, refer to Weights245
Apps202
Armrest, refer to Center
armrest108
Arrival time
– computer72
Ashtray109
Assistance systems, refer to
Dynamic Stability Control
DSC83
AUC Automatic recirculated
air control101
Audible instructions, refer to
Voice instructions136
Audio144
– controls144
– switching on/off144
– tone control144
– volume144Automatic
– air distribution100
– air volume100
– cruise control68
– headlamp control94
Automatic car washes223
Automatic climate control99
Automatic curb monitor52
Automatic high beams and
low beams, refer to High-
beam Assistant96
Automatic lamps
– refer to Welcome lamps94
Automatic recirculated air
control AUC101
Automatic Service
Request202
Automatic transmission with
Steptronic59
– selector lever lock60
– shiftlock60
– towing236
– tow-starting236
AUTO program for automatic
climate control100
AUX-IN port166
Available services202
Average fuel consumption72
– setting the units74
Average speed72
Avoid highways in
navigation134
Avoiding unintentional
alarms35
Axle loads, refer to
Weights245
B
Backrests, refer to Seats46
Backrest width adjustment47
Back seats, refer to Rear seats
– adjusting head restraints48