2008 BMW M3 CONVERTIBLE ABS

Driving
58
Increasing desired speed
Repeatedly press the lever to the resistance
point or beyond, arrow1, until the desired
speed is reached.
>Each time the lever is pressed lightly to the
resistance point, the desired speed is
increased by approx. 1 mph or 1 km/h.
>Each time the lever is pressed beyond the
resistance point, the desired speed is
increased by up to 5 mph or 10 km/h.
The system stores and maintains the speed.
Accelerating using the lever
Accelerate slightly, increase speed steadily:
Press the lever to the resistance point, arrow 1,
until the desired speed is reached.
Accelerate strongly, increase speed in intervals
of 10:
Press the lever beyond the resistance point,
arrow 1, until the desired speed is reached.
The vehicle accelerates without pressure on
the accelerator pedal. The system stores and
maintains the speed.
Decreasing speed
Repeatedly pull the lever to the resistance point
or beyond, arrow 2, until the desired speed is
displayed.
>Each time the lever is pulled to the resis-
tance point, the desired speed is decreased
by approx. 1 mph or 1 km/h.
>Each time the lever is pulled beyond the
resistance point, the desired speed is
reduced by up to 5 mph or 10 km/h until the
minimum speed of 20 mph or 30 km/h is
achieved.
The system stores and maintains the speed.
Deactivating cruise control
Tap the lever upwards or downwards, arrow3.
The displays on the speedometer disappear.
In addition, the system is automatically deacti-
vated:
>When you brake the vehicle>When you shift or depress the clutch
>When you deactivate DSC
>When DSC or ABS is intervening
Cruise control is not deactivated by depressing
the accelerator pedal. Once the accelerator
pedal is released, the stored speed is achieved
again and maintained.
Resuming a speed stored beforehand
Press the button, arrow4.
The stored speed is resumed and maintained.
When the ignition is switched off, the stored
speed value is cleared and can no longer be
called up.
Displays in the instrument cluster
1Stored speed
2Selected speed is displayed briefly

Technology for driving comfort and safety
68
Antilock Brake System ABS
ABS prevents locking of the wheels during
braking. Safe steering response is maintained
even during full braking. Active safety is thus
increased.
The ABS is operational every time you start the
engine. Braking safely, refer to page99.
Electronic brake-force distribution
The system controls the brake pressure in the
rear wheels to ensure stable braking behavior.
Brake assist
When you apply the brakes rapidly, this system
automatically produces the maximum braking
force boost and thus helps to achieve the short-
est possible braking distance during full brak-
ing. This system exploits all of the benefits pro-
vided by ABS.
Do not reduce the pressure on the brake for the
duration of the full braking application.
Dynamic Stability Control DSC
DSC optimizes driving stability and traction. In
addition, the system recognizes unstable driv-
ing situations such as understeering and over-
steering, and helps keep the vehicle on a safe
course within physical limits by reducing engine
power and applying the brakes on individual
wheels.
The laws of physics cannot be repealed,
even with DSC. An appropriate driving
style always remains the responsibility of the
driver. Therefore, do not reduce the additional
safety margin again by taking risks, as this could
result in an accident.<
Deactivating DSC
Press the DSC OFF button for longer than
approx. 1 second; the indicator lamps for DSC
in the instrument cluster light up. Stabilizing
and drive-output promoting actions are no
longer executed.
You may find it useful to briefly deactivate DSC
under the following exceptional 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
To increase vehicle stability, activate DSC again
as soon as possible.
Activating DSC
Press the DSC OFF button again; the indicator
lamps in the instrument cluster go out.
For better control
If the indicator lamp flashes:
DSC is regulating the drive and brak-
ing forces.
If the indicator lamps are on:
DSC is deactivated.
Electronic Damper Control
EDC*
The concept
Whenever there is a change in any significant
parameter such as road surface quality or in an

Reference
At a glance
Controls
Driving tips
Mobility
69
operating condition such as steering, braking,
etc., the damping automatically adjusts to the
new conditions in fractions of a second.
You can select between three programs.
"Comfort" program
Select the "Comfort" program if you want com-
fort-oriented control of the shock absorbers.
"Normal" program
The "Normal" program offers control that is bal-
anced between comfort and sportiness.
"Sport" program
Select the "Sport" program if you want consis-
tently sporty control of the shock absorbers.
Selecting a program
Press the EDC button repeatedly:
>"Comfort": LED off:
>"Normal": one LED lights up.
>"Sport": both LEDs light up.
The selected program is stored for the remote
control currently in use and is activated the next
time the engine is started.
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
assistant will no longer hold the car in place
after approx. 2 seconds and the car will start to
roll backwards.<
Flat Tire Monitor FTM*
The concept
The Flat Tire Monitor detects pressure loss in a
tire by comparing the rotating speeds of the
individual tires while moving.
In the event of pressure loss, the rolling circum-
ference changes and, thus, the rotating speed
of the affected wheel. This change is detected
and is reported as a flat tire.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.
The system must be reinitialized each
time a tire inflation pressure has been cor-
rected or a wheel or tire has been changed.<
System limitations
The Flat Tire Monitor is unable to warn
the driver of sudden, severe tire damage
caused by external factors, nor can it identify
the gradual loss of pressure that will inevitably
occur in all four tires over a lengthy period of
time.<
In the following situations, the system could be
delayed or malfunction:
>System has not been initialized
>Driving on snowy or slippery road surface
>Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration
>Snow chains are attached
Initializing the system
The initialization is completed during driv-
ing, which can be interrupted at any time.

Reference
At a glance
Controls
Driving tips
Mobility
99
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 pipes, e. g.
when loading the cargo bay, otherwise there is a
risk of burn injuries.<
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.<
The risk of hydroplaning increases with declin-
ing tread depth on the tires, refer also to Mini-
mum tread depth on page113.
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 page69.
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.
M dual clutch transmission: never drive
with the transmission in neutral 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.
Manual transmission: never drive with the
clutch held down, with the transmission in neu-
tral 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

Wheels and tires
114 work is not carried out properly, there is a dan-
ger of subsequent damage and related safety
h a z a r d s . M a k e s u re t h a t t h e n e w w h ee l s a r e b a l-
anced.<
Retreaded tires
BMW recommends that you do not use
retreaded tires, since driving safety may
be impaired. The causes for this include poten-
tially different tire casing structures and often
wide variations in tire age, which can result in a
limited service life.<
Correct wheels and tires
BMW recommends that you use only
wheel and tire combinations that BMW
has tested and approved for your particular
vehicle. Variations in factors such as manufac-
turing tolerances mean that even wheels and
tires with identical official size ratings could
actually have different dimensions, which could
lead to body contact and thus to severe acci-
dents. When selecting tires, also take their load
capacity into account. If non-approved wheels
and tires are used, BMW cannot evaluate their
suitability, and therefore cannot guarantee their
driving safety.<
You can inquire about the right wheel/tire com-
bination at your BMW center.
The correct combination of wheels and tires is
also necessary to ensure reliable operation of
various vehicle systems such as ABS or DSC.
To maintain good handling and vehicle
response, use only tires of a single brand and
tread configuration. After a tire has been dam-
aged, mount the previous wheel and tire combi-
nation again as soon as possible.
Wheels with Tire Pressure Monitor
TPM electronics
When mounting new tires or changing over
from summer to winter tires, or vice versa, only
use wheels with TPM electronics; otherwise the
Tire Pressure Monitor may not be able to detect
a puncture, refer to page70. Your BMW center
will be glad to advise you.
Recommended tire brands
Certain makes of tire are recommended by
BMW for each tire size. They are marked with a
clearly visible BMW designation on the sidewall
of the tire.
When properly used, these tires meet the high-
est standards in terms of safety and handling
characteristics.
Special characteristics of winter tires
BMW recommends winter tires for use in cold
winter driving conditions. Although all-season
M+S tires provide better winter traction than
summer tires, they generally fail to provide the
same levels of cold-weather performance as
winter tires.
Pay attention to speed
Always comply with the speed limit for the
winter tires mounted on your car; failure
to do so could result in tire damage and acci-
dents.<
Storage
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 sidewall of
the tire.
Swapping wheels between axles
BMW advises against swapping wheels
between the front and rear axles, even if all tires
have the same size, as this could impair driving
characteristics. With standard-equipment tires

Giving and receiving assistance
136
First aid pouch*
Some of the articles contained in the first aid
pouch have a limited service life. Therefore,
check the expiration dates of the contents reg-
ularly and replace any items in good time, if nec-
essary.
Coupe
The first aid pouch is located on the right-hand
side of the cargo bay in a storage area.
Convertible
The first aid pouch is located in a compartment
under the front passenger's seat.
To open: press the button and fold the cover
down.
To close: fold the cover back up and press it into
the catch.
Warning triangle*
Coupe
The warning triangle is located on the left-hand
side of the cargo bay. Press the tab to take it
out.
Convertible
The warning triangle is located in a holder in the
luggage compartment lid. Press the tabs to take
it out.
Jump starting
If the car's own battery is flat, your BMW's
engine can be started by connecting two
jumper cables to another vehicle's battery. You
can also use the same method to help start
another vehicle. Only use jumper cables with
fully-insulated clamp handles.
Do not touch any electrically live parts
when the engine is running, or a fatal acci-
dent may occur. Carefully adhere to the follow-
ing sequence, both to prevent damage to one or
both vehicles, and to guard against possible
personal injuries.<

Reference
At a glance
Controls
Driving tips
Mobility
145
Flashing:
Dynamic Stability Control DSC is regu-
lating the drive and braking forces, refer
also to page68
Dynamic Stability Control DSC is deac-
tivated, refer also to page68Driving stability limited during accelera-
tion and cornering.
Driving style must be readjusted.
Suspension control system failed, refer
also to page68Driving stability limited during accelera-
tion and cornering.
You can continue your journey, but
moderate your speed and exercise due
caution. Have the system checked as
soon as possible.
Indication in US models
The driving stability control systems,
including ABS and the Tire Pressure
Monitor, have failed, refer also to
page67You can continue your journey.
Reduced braking and driving stability.
Drive at moderate speeds, avoiding
abrupt braking maneuvers. Have the
system checked as soon as possible.
Indication
* in Canadian models
The driving stability control systems,
including ABS and the Flat Tire Monitor
or Tire Pressure Monitor
*, have failed,
refer also to page67You can continue your journey.
Reduced braking and driving stability.
Drive at moderate speeds, avoiding
abrupt braking maneuvers. Have the
system checked as soon as possible.
Indication
* in Canadian models
The driving stability control systems,
including ABS and the Flat Tire Monitor
or Tire Pressure Monitor
*, have failed,
refer also to page67You can continue your journey.
Reduced braking and driving stability.
Drive at moderate speeds, avoiding
abrupt braking maneuvers. Have the
system checked as soon as possible.
Vehicles with Flat Tire Monitor
*
Light up in yellow and red:
>Tire is deflated Carefully bring the car to a stop. Comply
with the additional information starting
on page69.
>Flat Tire Monitor not initialized Initialize Flat Tire Monitor, refer to
page69.
Light up in yellow:
Flat Tire Monitor failed. Punctures are
not indicatedHave the system checked.
12Cause What to do

Everything from A to Z
156
Everything from A to Z
Index
A
ABS Antilock Brake
System67
Acceleration assistant, refer to
Launch Control53
Accident, refer to Sending an
Emergency Request135
Activated-charcoal filter for
automatic climate control83
Adaptive Head Light77
Additives
– coolant119
Adjusting temperature inside
the car, refer to Automatic
climate control81
Adjusting the thigh support36
Airbags72
– indicator/warning lamp74
– sitting safely35
Air conditioning mode
– automatic climate control81
– ventilation83
Air distribution
– automatic81
Air flow rate81
Airing, refer to Ventilation83
Air pressure, refer to Tire
inflation pressure110
Air recirculation, refer to
Recirculated-air mode82
Air supply
– automatic climate control81
– ventilation83
Air vents80
AKI, refer to Fuel
specifications109
Alarm system25
– avoiding unintentional
alarms26
– interior motion sensor26
– switching off an alarm26
– tilt alarm sensor26All-season tires, refer to
Winter tires114
Ambient air, refer to
Recirculated-air mode82
Antifreeze
– coolant119
– washer fluid57
Antilock Brake System
ABS67
Anti-theft alarm system, refer
to Alarm system25
Anti-theft system19
Approved axle loads, refer to
Weights155
Approved gross vehicle
weight, refer to Weights155
Armrest, refer to Center
armrest88
Ashtray
– front90
– rear90
Assistance systems, refer to
Driving stability control
systems67
AUC Automatic recirculated-
air control82
Audio device, external88
Automatic
– air distribution81
– air flow rate81
– cruise control57
– headlamp control76
Automatic car washes123
Automatic climate control80
– automatic air distribution81
Automatic curb monitor42
Automatic recirculated-air
control AUC82
Automatic transmission with
Steptronic
– towing137
– tow-starting137AUTO program for automatic
climate control81
AUX-In port88
Average fuel consumption61
– setting the units62
Avoiding unintentional
alarms26
Axle loads, refer to
Weights155
B
Backrest contour, refer to
Lumbar support36
Backrests, refer to Seat
adjustment36
Backrest width adjustment37
Back seats
– refer to Rear seats38
Backup lamps
– replacing bulb129
Backup lamps, refer to Tail
lamps129
Bag holder92
Band-aids, refer to First-aid
pouch136
Bar, refer to Towing
methods138
Base plate for telephone or
mobile phone
– refer to Snap-in adapter in
the center armrest storage
compartment88
Battery133
– charging133
– disposal28,133
– jump starting136
– remote control18
– temporary power failure133
Battery renewal
– remote control28
– remote control for vehicle28
Being towed138