2008 BMW M5 traction control

Technology for comfort, convenience and safety
80
Brake assistant
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 pedal
for the duration of the full braking.
DSC Dynamic Stability Control
DSC optimizes vehicle stability and traction. It
also detects unstable driving states such as
understeering and oversteering, and helps
keep the vehicle on course within the physical
limits by reducing the engine output and by
braking at the wheels.
The DSC is operational every time you start the
engine.
The laws of physics cannot be repealed,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 further by taking risks.<
Indicator lamp
The indicator lamp goes out shortly
after the engine is started.
The indicator lamp flashes: DSC con-
trols the drive forces and brake forces.
The indicator lamp stays lit: DSC is deactivated.
M Dynamic Mode MDM
The M Dynamic Mode is a mode of the DSC
Dynamic Stability Control. It enables driving
with greater longitudinal and lateral accelera-
tion on dry road surfaces, however with limited
vehicle stability. The system does not provide
stabilizing intervention by reducing the engine
output and braking at the wheels until the abso-
lute driving limit is reached. Additional steering
corrections may also be required in this driving
state.
The M Dynamic Mode is deactivated each time
the engine is started.With the M Dynamic Mode activated, sta-
bilizing interventions are only carried out
to a reduced degree. Take action yourself, oth-
erwise there is a risk of an accident.<
To maintain vehicle stability, drive with
DSC activated and the M Dynamic Mode
deactivated whenever possible.<
Indicator lamp
The indicator lamp goes out shortly
after the engine is started.
The indicator lamp stays lit: M Dynamic
Mode is activated.
The indicator lamp lights up continuously and
the DSC indicator lamp flashes: the M Dynamic
Mode is active and controls the drive and brak-
ing forces.
Activating MDM
You activate the M Dynamic Mode with the
button on the steering wheel, refer to MDrive on
page50.
With the ignition switched on you can set
MDrive on the Control Display.
iDrive, for operating principle refer to page16.
1.Press the button.
This opens the start menu.
2.Press the controller to open the menu.
3.Select "MDrive" and press the controller.
4.Select "DSC" and press the controller.
5.Select "M Dynamic Mode" and press the
controller.

Controls
81Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
You can also activate and deactivate the
M Dynamic Mode with the MDM button.
Deactivating MDM again
Press the button on the steering wheel or the
MDM button
* again; the MDM indicator lamp
goes out.
Deactivating DSC
To maintain vehicle stability, drive with
the system activated whenever possi-
ble.<
When rocking free or starting off from deep
snow or on loose road surfaces, it can be useful
to briefly deactivate DSC.
Press the DSC OFF button
*; the DSC indicator
lamp lights up continuously. DSC and MDM are
deactivated.
A message appears on the Control Display.
Please note any supplementary information
that appears there.
Manual transmission
*:
Press and hold the MDM button.
Under unfavorable traction conditions, the
engine output may be briefly reduced even
when DSC is deactivated.
Reactivating DSC
Press the DSC OFF button; the indicator lamp
in the instrument cluster goes out.
You can also activate and deactivate DSC with
the button on the steering wheel, refer to
MDrive on page50.
Manual transmission
*:
Press the MDM button.
Malfunction in driving-stability control
systems
The warning lamp for the brake system
lights up, together with the indicator
lamps for ABS, DSC and Tire Pressure
Monitor or Flat Tire Monitor. A mes-
sage appears on the Control Display.
The driving-stability control systems
have failed. Conventional braking effi-
ciency remains available without limita-
tions. While you may continue, you
should remember to proceed cau-
tiously and drive defensively while avoiding full
brake applications. The Tire Pressure Monitor
or the Flat Tire Monitor is also malfunctioning.
Have the system checked as soon as possible.
Display of the previously described
malfunction in Canadian models.
The DSC warning lamp lights up.
A malfunction has occurred in DSC
including MDM. The stability mainte-
nance functions are no longer available. The
vehicle remains operational. Have the system
checked as soon as possible.
The brake system warning lamp lights
up yellow. A message appears on the
Control Display. The brake assistant is
defective. Have the system checked as soon as
possible.

Navigation
Entertainment
Driving tips
171Reference
At a glance
Controls
Communications
Mobility
Repeating a track
1.Select the current track and press the con-
troller.
2.Select "Repeat track" and press the con-
troller.
To stop repeating:
1.Press the controller.
2.Select "Repeat track" and press the con-
troller.
Random play sequence
You can play back the tracks of the selected list
in random order, e.g. all tracks of an artist.
1.Select the current track and press the con-
troller.
2.Select "Random" and press the controller.
End random playback:
1.Press the controller.
2.Select "Random" and press the controller.
Fast forward/reverse
Buttons next to CD player:
Press and hold the button for the corre-
sponding direction.
Notes
Do not subject the audio device to
extreme environmental conditions, e.g.
extremely high temperatures, refer to the oper-
ating instructions of the audio device. Other-
wise, the audio device can be damaged and the
resulting distraction can reduce road safety
while driving.<
Depending on the configuration of the audio
files, e.g. bit rates greater than 256 Kbit/s,
proper playback cannot always be ensured.
Connecting instructions
>The USB/audio interface supplies the con-
nected audio device with power, provided
the audio device supports this function. It is
therefore unnecessary to connect the audio
device to a socket in the vehicle during
operation.
>Do not force the plug into the USB interface.
>Do not connect any devices, e.g. fans or
lamps, to the USB/audio interface.
>Do not connect USB hard disks.
>Do not use the audio interface to recharge
external devices.

Mobility
201Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Observe all national and local maximum speed
limits, otherwise violations of the law could
occur.
Tire identification marks
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tire size
Speed letter
Q = up to 100 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
Z = over 150 mph/240 km/h
Tire Identification Number
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
Tire age
The manufacturing date of tires is contained in
the tire coding: DOT ... 3307 indicates that the
tire was manufactured in week 33 of 2007.
BMW recommends that you replace all tires
after 6 years at most, even if some tires may last
for 10 years. This also concerns the tire of the
spare wheel.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Tread wear 200 Traction AA
Temperature A
Tire sizePressure specifications in psi/kPa
Traveling speeds
up to max. of
100 mph/160 km/hTraveling speeds
including those exceeding
100 mph/160 km/h
All pressure specifications
in the table are indicated in
psi/kilopascal with cold tires.
Cold = ambient temperature
245/45 R 18 100 V XL M+S 35/240 38/260 35/240 38/260 41/280 46/320
255/40 ZR 19 36/250 - 36/250 - 41/280 -
285/35 ZR 19 - 36/250 - 36/250 - 46/320
More details on the permissible load and weights can be found on page232.
e.g.
Nominal width in mm
Aspect ratio in Ξ
Belted construction – radial
Rim diameter in inches
Carrying capacity ID-code
(not in ZR tires)
Speed code letter
(in ZR tires before the R)
245/45 R18100 V
285/35 ZR19
e.g.
Manufacturer code
for tire make
Tire size and tire design
Tire ageDOT xxxx xxx 3307

Wheels and tires
202
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. For example, a tire graded
150 would wear one and one-half (1γ) times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits, service
practices and differences in road characteris-
tics and climate.
Traction
The traction grades, from highest to lowest, are
AA, A, B, and C.
These grades represent the tire's ability to stop
on wet pavement, as measured under con-
trolled conditions on specified government test
surfaces of asphalt and concrete. A tire marked
C may have poor traction performance.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction charac-
teristics.<
Temperature
The temperature grades are A, the highest, B,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and reduce
tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds to
a level of performance which all passenger car tires must meet under the Federal Motor Vehi-
cle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the
laboratory test wheel than the minimum
required by law.
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive speed,
underinflation, or excessive loading, either sep-
arately or in combination, can cause heat
buildup and possible tire failure.<
M+S
Winter and all-season tires.
These have better winter properties than sum-
mer tires.
XL
Indicates specially reinforced tires.
Tire condition
Inspect your tires frequently for tread wear,
signs of damage and for foreign objects lodged
in the tread. Check the tread depth.
Minimum tread depth
The tread depth should not drop below 0.12 in/
3 mm, although, for example, European legisla-
tion only specifies a minimum tread depth of
0.063 in/1.6 mm. At tread depths below 0.12 in/
3 mm there is an increased risk of high-speed
hydroplaning, even when only small amounts of
water are present on the road surface.
When winter tires wear down past a tread depth
of 0.16 in/4 mm, they become perceptibly less
suitable for winter conditions. For the sake of
safety, new tires should be installed.

Everything from A to Z
254 Tires
– age201
– air loss84,86
– breaking-in114
– changing203
– condition202
– damage203
– flat tire, refer to Changing
wheels219
– inflation pressure200
– M Mobility System217
– new wheels and tires203
– pressure monitoring, refer to
Flat Tire Monitor83
– pressure monitoring, refer to
TPM Tire Pressure
Monitor84
– replacing219
– retreaded tires203
– size201
– tread202
– wear indicators202
– wheel/tire combination203
– winter tires204
Tire trouble, changing
wheels219
TMC station, refer to Traffic
information140
"Tone"149
Tone dialing method184
Tone in audio mode
– adjusting149
– middle setting151
Tone on locking/unlocking31
Tools, refer to Onboard
toolkit214
"Top 8" for mobile phone182
Torque
– lug bolts, refer to After
mounting221
– refer to Engine data230
Touch tone dialing, refer to
Tone dialing method184
Tow bar226
Tow fitting225Towing225
– methods226
– tow fittings225
– with manual
transmission226
– with Sequential Manual
Transmission226
– with Sequential Manual
Transmission with
Drivelogic226
"Town / City" for destination
entry125
Tow rope226
Tow-starting225
"TPM"85
TPM Tire Pressure
Monitor84
– resetting system85
– system limits85
– warning lamp86
Tracks
– random sequence165
– sampling on CD164
– selecting with CD163
Track width, refer to
Dimensions231
Traction control, refer to DSC
Dynamic Stability
Control80
Traffic information for
navigation140
– depiction in route map142
– displaying141
– during destination
guidance143
– symbols142
"Traffic Info settings"141
Traffic jam
– displaying traffic
information140
– refer to Bypassing route
sections140Transmission
– breaking-in114
– Drivelogic61
– idle60
– manual transmission58
– reverse gear60
– Sequential Manual
Transmission with
Drivelogic59
– shift lights62
– starting assistant82
– towing225
– tow-starting226
Transporting children
safely53
Transport securing device,
refer to Securing cargo117
Tread depth, refer to Minimum
tire tread202
Treble, refer to Tone
control149
"Treble", tone control150
"Trip computer"69
Trip computer69
Trip-distance counter
– refer to Trip computer69
– refer to Trip meter66
"Triple turn signal"63
Trip meter, also refer to Trip
computer69
Trip odometer66
Trunk, refer to Cargo bay
Turning circle, refer to
Dimensions
231
Turning lamps94
– replacing bulbs215
Turn signals62
– indicator lamp12
– replacing bulbs216