brake BMW 135I COUPE 2008 E82 User Guide

Technology for driving comfort and safety
82
Deactivating DSC
Press the button for at least 3 seconds; the indi-
cator lamps for DSC in the instrument cluster
light up. Dynamic Traction Control DTC and
DSC have been simultaneously deactivated.
Stabilizing and drive-output promoting actions
are no longer executed.
in the same way as with a differential interlock,
even if DSC is deactivated, brake actions are
still performed on the rear axle to enhance drive
output if the drive wheels experience a signifi-
cant loss of traction.
To increase vehicle stability, activate DSC again
as soon as possible.
Activating DSC
Press the button again; the indicator lamps for
DSC in the instrument cluster go out.
For better control
If the indicator lamp flashes:
DSC is regulating the drive and braking
forces.
If the indicator lamps are on:
DSC is deactivated.
Dynamic Traction Control DTC
DTC is a version of DSC in which the drive out-
put is optimized for particular road conditions,
e.g. unplowed snow-covered roads. The sys-
tem assures the maximal drive output, but with
reduced driving stability. It is therefore neces-
sary to drive with appropriate caution.
You may find it useful to briefly activate DTC
under the following special circumstances:>When driving uphill on snow-covered roads,
in slush or on unplowed, snow-covered
roads
>When rocking a stuck vehicle free or start-
ing off in deep snow or on loose ground
>When driving with snow chains
Activating DTC
Press the button; the indicator lamps for DTC in
the instrument cluster come on.
For better control
If the indicator lamp flashes:
DTC is regulating the drive and braking
forces.
If the indicator lamps are on:
DTC has been activated.
Deactivating DTC
Press the button again; the DTC indicator
lamps in the instrument cluster go out.
Drive-off assistant
The drive-off assistant enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the parking brake for this.
1.Hold the car in place by depressing the
brake.
2.Release the brake and drive off without
delay.
The drive-off assistant holds the car in
place for approx. 2 seconds after the
brake is released. Drive off without delay after
releasing the brake. Otherwise, the drive-off

Controls
87Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
equipped with a tire pressure monitoring sys-
tem, TPMS, that illuminates a low tire pressure
telltale when one or more of your tires are signif-
icantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving
on a significantly underinflated tire causes the
tire to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency and
tire tread life, and may affect the vehicle’s han-
dling and stopping ability. Please note that the
TPMS is not a substitute for proper tire mainte-
nance, and it is the driver’s responsibility to
maintain correct tire pressure, even if underin-
flation has not reached the level at which the
TPMS low tire pressure telltale illuminates.
The TPMS malfunction indicator is combined
with the low tire pressure telltale. When the sys-
tem detects a malfunction, the telltale will flash
for approximately one minute and then remain
continuously lit. This sequence will continue
upon subsequent vehicle startups as long as
the malfunction exists. When the malfunction
indicator is illuminated, the system may not be
able to detect or signal low tire pressure as
intended. TPMS malfunctions may occur for a
variety of reasons, including the installation of
replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow
the TPMS to continue to function properly.
Active steering*
The concept
Active steering varies the turning angle of the
front wheels in relation to steering wheel move-
ments. It also varies the steering force required
to turn the wheels depending on the speed at
which you are driving.
When you are driving in the low road-speed
range, e.g. in a town or when parking, the steer-
ing angle increases, i.e. the steering becomes very direct, and less effort is required to turn the
wheels. In the higher speed range, on the other
hand, the steering angle is reduced more and
more. This improves the handling capability of
your BMW over the entire speed range.
In critical situations, the system can make tar-
geted corrections to the steering angle pro-
vided by the driver and thus stabilize the vehicle
before the driver intervenes. This stabilizing
intervention is simultaneously deactivated
when DSC is switched off, refer to page81.
Malfunction
The warning lamps come on. Active
steering is no longer operational. At
low speeds, greater steering wheel
movements are required, whereas at
higher speeds the vehicle reacts more sensi-
tively to steering wheel movements. The stabil-
ity-enhancing feature may also be deactivated.
Drive cautiously and think well ahead. Have the
system checked.
Brake Force Display*
On the left: normal braking.
On the right: sharp braking

Things to remember when driving
114
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
115Reference
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 page214.
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
page98.
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
with the road surface, so that neither the car can
be steered nor the brake be properly applied.<

Things to remember when driving
116 The risk of hydroplaning increases with declin-
ing tread depth on the tires, refer also to Mini-
mum tread depth on page206.
Driving through water
Drive through water on the road only if it is
not deeper than 1 ft/30 cm, and then only
at walking speed at the most. Otherwise, the
vehicle's engine, the electrical systems and the
transmission may be damaged.<
Use the parking brake on inclines
On inclines, do not hold the vehicle for a
lengthy period using the clutch; use the
parking brake instead. Otherwise greater clutch
wear will result.<
For more information about the drive-off assis-
tant, refer to page82.
Braking safely
Your BMW is equipped with ABS as a standard
feature. Applying the brakes fully is the most
effective way of braking in situations in which
this is necessary. Since the vehicle maintains
steering responsiveness, you can still avoid
possible obstacles with a minimum of steering
effort.
Pulsation of the brake pedal, combined with
sounds from the hydraulic circuits, indicate that
ABS is in its active mode.
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pressure on the brake pedal
every few miles. Monitor traffic conditions to
ensure that this maneuver does not endanger
other road users. The heat generated in this
process helps dry the pads and rotors to ensure
that full braking efficiency will then be available
when you need it.
Hills
To prevent overheating and the resulting
reduced efficiency of the brake system,
drive long or steep downhill gradients in the
gear in which the least braking is required. Even
light but consistent brake pressure can lead to high temperatures, brake wear and possibly
even brake failure.<
You can increase the engine's braking effect by
shifting down, all the way to first gear if neces-
sary. This strategy helps you avoid placing
excessive loads on the brake system. Down-
shifting in manual mode of the automatic trans-
mission, refer to page61.
Never drive with the clutch held down,
with the transmission in idle or with the
engine switched off; otherwise, engine braking
action will not be present or there will be no
power assistance to the brakes or steering.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
pedals, otherwise pedal function could be
impaired.<
Corrosion on brake rotors
When the vehicle is driven only occasionally,
during extended periods when the vehicle is not
used at all, and in operating conditions where
brake applications are less frequent, there is an
increased tendency for corrosion to form on
rotors, while contaminants accumulate on the
brake pads. This occurs because the minimum
pressure which must be exerted by the pads
during brake applications to clean the rotors is
not reached.
Should corrosion form on the brake rotors, the
brakes will tend to respond with a pulsating
effect that even extended application will fail to
cure.
When the vehicle is parked
Condensation forms while the automatic cli-
mate control is in operation, and then exits
under the vehicle. Traces of condensed water
under the vehicle are therefore normal.
Before driving into a car wash
For general information about taking care of
your BMW, refer to the Caring for your vehicle
brochure.

177
Entertainment
Reference
At a glance
Controls
Driving tips Communications
Navigation
Mobility
When the status information "BMW Assist" or
"BMW Service" is displayed in "Communica-
tion", only BMW Assist calls are possible.
It may not be possible to establish a telephone
connection using the mobile phone while a con-
nection is being established to BMW Assist or
while a call to BMW Assist is already in
progress. If this happens, you must unpair the
mobile phone and the vehicle if you wish to
place a call with the mobile phone.
Start-up
Pairing the mobile phone with the
vehicle
The following prerequisites must be met:
>Compatible mobile phone: the mobile
phone is supported by the full preparation
package mobile phone. You can obtain
information on the Internet at:
www.bmw.com
>The mobile phone is ready to operate.
>The Bluetooth link is activated in the vehi-
cle, refer to page181, and in the mobile
phone.
>Depending on the mobile phone, some
default settings may be necessary for the
mobile phone: e. g. using the following
menu items:
>Bluetooth switched on
>Connection without confirmation
>Reconnection
>Depending on the mobile phone type, the
power-saving mode setting, for example,
may result in a paired mobile phone not
being detected by the vehicle.
>For pairing purposes, define any number as
the Bluetooth passkey, e.g. 1. This Blue-
tooth passkey is no longer required after
pairing has been successful.
>The ignition is switched on.
Pair the mobile phone with the vehicle
only when the car is stationary, to avoid endangering the car's occupants and other
road users by being distracted.<
Switch on ignition
1.Insert remote control all the way into the
ignition lock.
2.Switch on ignition without operating the
brake or clutch or pressing the start/stop
button.
Preparation via iDrive
iDrive, for operating principle refer to page16.
3.Press the button to call up the start
menu.
4.Press the controller to open the menu.
5.Select "Settings" and press the controller.
6.Select "Bluetooth" and press the controller.

Maintenance
214
Maintenance
BMW Maintenance System
The BMW Maintenance System supports the
preservation of the traffic and operating safety
of your BMW. The objective is to optimize
efforts with respect to minimal vehicle mainte-
nance costs.
If and when you come to sell your BMW, a com-
prehensive record of servicing will prove a sig-
nificant benefit.
Condition Based Service CBS
Sensors and special algorithms take the differ-
ent driving conditions of your BMW into
account. Condition Based Service uses this to
determine the current and future service
requirements. By letting you define a service
and maintenance regimen that reflects your
own individual requirements, the system builds
the basis for trouble-free driving.
On the Control Display, you can have the
remaining times or distances for selected main-
tenance tasks and any legally prescribed dates
displayed, refer to page71:
>Engine oil
>Brake pads: separately for front and rear
>Brake fluid
>Vehicle check
>Legally mandated inspections depending
on local regulations
Service data in the remote control
Your vehicle continuously stores service-
requirement information in the remote control
while you are driving. Your BMW Service Advi-
sor can read out this data from the remote con-
trol unit, and propose an optimized mainte-
nance approach. Whenever you take your car in
for servicing you should therefore hand your
BMW Service Advisor the remote control unit
that you last used.
Make sure that the date is always set cor-
rectly, refer to page75; otherwise the
effectiveness of Condition Based Service CBS
is not assured.<
Service and Warranty Information
Booklet for US models and Warranty
and Service Guide Booklet for
Canadian models
Please consult your Service and Warranty Infor-
mation Booklet for US models and Warranty
and Service Guide Booklet for Canadian models
for additional information on service require-
ments.
BMW recommends that you have service
and repair operations performed at your
BMW center.
Take the time to ensure that these service pro-
cedures are confirmed by entries in your vehi-
cle's Service and Warranty Information Booklet
for US models and Warranty and Service Guide
Booklet for Canadian models. These entries
verify that your vehicle has received the speci-
fied regular maintenance.<

Replacing components
218 4.Attach the connector, insert the bulb and
turn it all the way in the opposite direction.
5.Attach the headlamp cover.
Corner-illuminating lamps
H3 bulb, 55 watts
The figure shows the right-hand headlamp.
1.Remove the top headlamp cover, using the
screwdriver to push the detents to one side.
2.Turn the bulb holder, see arrow, and
remove it.
3.Slide the bulb out of the holder and pull off
the connector.
4.Replace the bulb and attach the connector.
5.Insert the bulb holder and turn it all the way
in the opposite direction.
6.Attach the headlamp cover.
Turn signals, front
21 watt bulb, PY21W Silver Vision
The turn signal bulb can be changed via a cover
in the wheel arch.1.Turn the respective wheel inwards.
2.Using a coin, turn both locks of the cover all
the way to the left, arrow 1, and remove the
cover.
3.Turn the bulb holder to the left and remove
it, arrow2.
4.Apply gentle pressure to the bulb while
turning it to the right for removal and
replacement.
5.Insert the bulb holder and lock it by turning
it to the right.
6.Attach the cover by positioning the bottom
edge first and then turning both locks all the
way to the right.
Tail lamps
>Turn signal:
21 watt bulb, PY21W
>Backup lamp:
16 watt bulb, W16W
>Brake lamps:
21 watt bulb, P21W
>Brake Force Display lamp:
21 watt bulb, H21W
1Inner brake lamp
2Outer brake lamp

Mobility
219Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
3Lateral reflector
4Roadside parking lamp and tail lamp LED
5Reflector
6Turn signal
7Backup lamp
8Brake Force Display lamp
Replacing tail lamps
Outer brake lamp
The outer brake lamp can be accessed through
a single socket.
The figure shows the right side of the vehicle.
1.Remove the cover from the panel of the
cargo bay.
2.Turn the bulb holder to the left, see arrow,
and remove it.
3.Apply gentle pressure to the bulb while
turning it to the left for removal and replace-
ment.
4.Attach the bulb holder and turn it all the way
in the opposite direction.
5.Reattach the cover.
Inner brake lamp, turn signal, backup
lamp and Brake Force Display lamp
The bulbs are integrated in a single bulb holder.
1.Remove the cover from the panel of the
cargo bay.
2.Detach the bulb holder by pressing
together the clips, see arrow, and remove it.
3.Brake lamps and turn signal: apply gentle
pressure to the bulb while turning it to the
left for removal and replacement.
4.Backup lamp: pull the bulb out of the socket
and replace it.
5.Attach the bulb holder and let it snap into
place.
6.Reattach the cover.
The roadside parking lamp/tail lamp uses
LED design. After replacing the bulb,
ensure that the bulb holder is properly seated,
otherwise the roadside parking lamp/tail lamp
may not work.<
License plate lamps and center brake
lamp
These lamps use LED technology for operation.
In the event of a malfunction, please contact
your BMW center or a workshop that works
according to BMW repair procedures with cor-
respondingly trained personnel.
Changing wheels
Your BMW is equipped with Run-Flat Tires as
standard. This removes the need to change a
wheel immediately in the event of a puncture.

Everything from A - Z
240
Everything from A - Z
Index
"..." Identifies Control Display
texts used to select
individual functions and
refers you to the page where
these texts can be found.
A
Accessories, refer to The
individual vehicle5
Accident, reporting, refer to
Emergency Request222
Activated-charcoal filter100
"Activation time" for parked
car ventilation100
Active steering87
Adaptive Head Light93
"Add digits" on the mobile
phone184
Additives
– coolant213
– engine oil212
"Address book" in
navigation131
Address for navigation
– deleting133
– entering123,131
– selecting132
– storing131
– storing current position132
"Add to destination list"126
Airbags88
– sitting safely45
– warning lamp89
Air conditioner96
Air distribution
– automatic98
Air flow rate98
Airing, refer to Ventilation99
Air outlets, refer to Air
vents96Air pressure, checking, refer
to Tire inflation
pressure202
Air recirculation, refer to
Recirculated-air mode98
"Air recirculation on / off"53
Air vents96
AKI, refer to Fuel
specifications200
Alarm system34
– avoiding unintentional
alarms35
– interior motion sensor35
– switching off an alarm35
– tilt alarm sensor35
"All channels" for satellite
radio161
All-season tires, refer to
Winter tires208
"All stations", displaying with
the radio154
"AM", waveband150,154
Ambient air, refer to
Recirculated-air mode98
Antenna for mobile phone176
Antifreeze
– coolant213
– washer fluid64
Antilock Brake System
ABS81
Anti-theft alarm system, refer
to Alarm system34
Anti-theft system29
Approved axle loads, refer to
Weights233
Approved gross vehicle
weight, refer to Weights233
Armrest, refer to Center
armrest106
Arrival time
– computer68
Arrival time, refer to Starting
destination guidance136Arrow display for
navigation137
"Arrow display" in
navigation137
Ashtray107
Assistance systems, refer to
Dynamic Stability Control
DSC81
AUC Automatic recirculated-
air control98
"Audio"153,157
Audio150
– controls150
– switching on/off150
– tone control151
– volume151
"Audio", refer to Tone
control151
Automatic
– air distribution98
– air flow rate98
– cruise control64
– headlamp control91
– service notification193
– storing of stations155
Automatic car wash, refer to
Car wash116
Automatic climate control96
– automatic air distribution98
– settings via iDrive97
Automatic curb monitor52
Automatic lamps
– refer to Welcome lamps91
"Automatic programs" with
automatic climate control98
Automatic recirculated-air
control AUC98
Automatic station search155