2008 BMW M3 CONVERTIBLE snow chains

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The laws of physics cannot be repealed,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.

Technology for driving comfort and safety
70 When driving resumes, the initialization is con-
tinued automatically.
Do not initialize the system while snow chains
are attached.<
1.Start the engine, but do not start driving.
2.Press the button for approx. 4 seconds until
the warning lamp in the instrument cluster
lights up yellow. Warning lamp, refer to Indi-
cation of a flat tire on page70.
3.Start to drive.
Initialization is completed while the car is
moving, without any feedback.
Indication of a flat tire
The warning lamps come on in yellow
and red. In addition, an acoustic sig-
nal sounds. There is a flat tire or sub-
stantial loss of tire pressure.
1.Reduce your speed and carefully stop the
car. Avoid sudden braking and steering
maneuvers.
2.Identify the damaged tire. To do so, check
the tire pressure using the M Mobility Sys-
tem, refer to Producing the tire inflation
pressure on page132.
3.Repair the flat tire with the M Mobility Sys-
tem, refer to page132.
Malfunction
The warning lamps come on in yel-
low. The Flat Tire Monitor has a mal-
function or has failed. Have the sys-
tem checked as soon as possible.
Tire Pressure Monitor TPM*
The concept
TPM checks the inflation pressures of the four
mounted tires. The system notifies you if there
is a significant loss of pressure in one or more
tires.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be reset while all tire infla-
tion pressures are correct.
Always use wheels with TPM electronics. Oth-
erwise, the system may malfunction.
Each time a tire inflation pressure has
been corrected or a wheel or tire has been
changed, reset the system.<
System limitations
TPM cannot warn you in advance of sud-
den severe tire damage caused by out-
side influences.<
The system does not work correctly if it has not
been reset; for example, a flat tire may be indi-
cated even though the tire inflation pressures
are correct.
The system is inactive and cannot indicate a flat
tire if a wheel without TPM electronics has been
mounted, or if TPM is temporarily malfunction-
ing due to other systems or devices using the
same radio frequency.
Resetting the system
Each time a tire inflation pressure has
been corrected or a wheel or tire has been
changed, reset the system.<
1.Start the engine, but do not start driving.
2.Press the button for approx. 4 seconds until
the warning lamp in the instrument cluster
lights up yellow. Warning lamp, refer to

Reference
At a glance
Controls
Driving tips
Mobility
115
and other mixed tire sizes, swapping wheels
between the axles is not permissible.
Snow chains*
Only certain fine-link snow chains have been
tested by BMW, classified as safe for use and
recommended. Consult your BMW center for
more information.
Snow chains must be mounted in pairs and on
the rear wheels only. Observe the manufac-
turer's instructions when mounting snow
chains. Do not exceed a speed of 30 mph or
50 km/h.
Ensure that the snow chains are sufficiently
tensioned at all times. If necessary, retension as
specified by the snow chain manufacturer.
Do not initialize the Flat Tire Monitor if
snow chains are mounted, otherwise the
instrument might issue an incorrect reading.<

Everything from A to Z
160 Filter
– refer to Microfilter/activated-
charcoal filter for automatic
climate control83
First aid pouch136
Fixture for remote control,
refer to Ignition lock46
Flashlight, refer to LED hand
lamp88
Flash when locking/
unlocking21
Flat tire
– Tire Pressure Monitor
TPM70
Flat tire, repairing131
Flat Tire Monitor FTM69
– indicating a flat tire70
– indicator/warning lamp70
– initializing the system69
– malfunction70
– snow chains69,115
– system limits69
Flat tires, refer to Tire
condition113
Fluid reservoir, refer to
Washer fluid reservoir57
Folding in the mirrors, before
driving into a car wash41
Folding up the floor panel93
Footbrake, refer to Braking
safely99
Footwell lamps, refer to
Interior lamps79
Forward position, engaging,
refer to Selector lever
positions49
For your own safety5
Front airbags72
FTM, refer to Flat Tire
Monitor69
Fuel109
– average consumption61
– gauge60
– high-quality brands109
– quality109
– specifications109
– tank contents, refer to
Capacities155Fuel clock, refer to Fuel
gauge60
Fuel display, refer to Fuel
gauge60
Fuel filler door108
– releasing in the event of
electrical malfunction108
Fuses133
G
Garage door opener, refer to
Integrated universal remote
control84
Gasoline
– refer to Average
consumption61
Gasoline, refer to Required
fuel109
Gasoline display, refer to Fuel
gauge60
Gasoline engine, checking
engine oil level117
Gear
– neutral50
Gear change51
Gear display, refer to Displays
in the instrument cluster51
Gearshift lever
– manual transmission48
Gearshifts
– manual transmission48
General driving notes98
Glass roof, electric30
– closing after electrical
malfunction30
– convenient operation20,22
– initializing30
– opening, closing30
– operation with convenient
access27
– pinch protection system30
– power failure30
– raising30
– remote control20
Glove compartment87
– LED hand lamp88
Grills80Gross vehicle weight, refer to
Weights155
H
Handbrake, refer to Parking
brake48
Hand lamp, refer to LED hand
lamp88
Hands-free system14
Hazard warning flashers14
Head airbags72
Headlamp control,
automatic76
Headlamp flasher55
– indicator lamp11,14,140
Head restraints37
– front, removing37
– rear, removing38
– sitting safely35
Heated
– mirrors42
– rear window82
– seats38
Heating
– mirrors42
– rear window82
– residual heat82
– seats38
Heating and ventilation, refer
to Climate80
Heating while at a standstill,
refer to Using residual
heat82
Heavy loads, refer to Stowing
cargo101
Height, refer to
Dimensions153
Height adjustment
– seats36
– steering wheel42
High beams78
– headlamp flasher78
– indicator lamp140
High-pressure
washer123,124
High water, refer to Driving
through water99
Hills99

Everything from A to Z
164
S
Safety-belt height
adjustment40
Safety belts40
– belt hand-over41
– damage40
– indicator/warning lamp40
– reminder40
– sitting safely35
Safety systems
– airbags72
– Antilock Brake System
ABS67
– brake system68
– driving stability control
systems67
– Dynamic Stability Control
DSC68
– rollover protection system,
convertible74
– safety belts40
Screw thread for tow
fitting138
Sealant, filling132
Seat adjustment
– electric36
– mechanical36
Seat and mirror memory39
Seat belt reminder, refer to
'Fasten safety belts'
reminder40
Seat heating38
Seats35
– adjusting electrically36
– adjusting the seats36
– heating38
– memory, refer to Seat and
mirror memory39
– saving a setting, refer to Seat
and mirror memory39
– sitting safely35
Securing cargo93,95
Securing the vehicle
– from inside23
– from outside19
Selector lever positions49Sequential M Gearbox with
Drivelogic
– Drivelogic drive programs52
Sequential mode50
Service, refer to Roadside
Assistance135
Service car, refer to Roadside
Assistance135
Service data in the remote
control121
Service Interval Display, refer
to Condition Based Service
CBS121
Service requirement display,
refer to Condition Based
Service CBS121
Service requirements63
Settings
– clock, 12h/24h format62
Settings and information61
Shifting51
Shifting gears
– manual transmission48
Shift lever49
Shift Lights52
Shiftlock50
Shift paddles on steering
wheel51
Shift-up display, refer to Shift
Lights52
Shock absorber control, refer
to Electronic Damper
Control EDC68
Side airbags72
Side windows, refer to
Windows28
Signal horn, refer to
Horn10,11
Sitting safely35
– with airbags35
– with head restraint35
– with safety belts35
Ski bag93
Ski bag for convertible, refer to
Through-loading opening
with integrated transport
bag94
Sliding/tilt sunroof, refer to
Glass roof, electric30Slot for remote control46
Smokers' package, refer to
Ashtray90
Snap-in adapter, refer to
Center armrest storage
compartment88
Snow chains115
Socket, On-Board Diagnosis
OBD122
Socket, refer to Connecting
electrical appliances90
SOS, refer to Sending an
Emergency Request135
Spare fuses,133
Spare fuses, refer to
Fuses133
Speed
– with winter tires114
Speedometer12
"Sport"54
"Sport" with EDC69
Spray nozzles, refer to
Cleaning windshield and
headlamps56
Stability control, refer to
Driving stability control
systems67
Start/stop button46
– starting the engine47
– switching off the engine47
Starting, refer to Starting the
engine47
Starting assistance, refer to
Jump starting136
Starting difficulties
– jump starting136
Starting the engine
– start/stop button46
Status of this Owner's Manual
at time of printing5
Steam jet123,124
Steering wheel42
– adjustment42
– buttons on steering
wheel11
– lock46
– locking with convenient
access27
– shift paddles51