differential BMW 135I 2010 E81 Owner's Manual

Technology for driving comfort and safety
76
Driving stability control
systems
Your BMW has a number of systems that help
to maintain the vehicle's stability even in
adverse driving conditions.
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 page110.
Electronic brake-force distribution
EBV
The system controls the brake pressure in the
rear wheels to ensure stable braking behavior.
Dynamic Brake Control DBC
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 prevents the driving wheels from losing
traction when you pull away from rest or accel-
erate. The system also recognizes unstable
driving conditions, for example if the rear of the
car is about to swerve or if momentum is acting
at an angle past the front wheels. In these
cases, DSC helps the vehicle maintain a safe
course within physical limits by reducing engine
output and through braking actions at the indi-
vidual 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The laws of physics cannot be repealed,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 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:

Things to remember when driving
108
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.

Reference 235
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Corner-illuminating lamps,
refer to Adaptive light
control87
Cornering lamps, refer to
Adaptive light control87
Country codes DVD149
Courtesy lamps90
Criteria for route126
Cross-hairs in navigation122
Cruise control61
Cruising range65
Cupholders100
Curb weight, refer to
Weights225
Current fuel consumption65
Current playback
– external devices161
– of music collection156
Customer Relations183
D
Dashboard, refer to
Cockpit10
Dashboard lighting, refer to
Instrument lighting89
Data
– dimensions223
– sizes223
Data, technical222
– capacities226
– engine222
– weights225
Data transfer184
Date
– setting70
– setting format71
Daytime running lights, switch
positions87
DBC Dynamic Brake
Control76
Deactivating front passenger
airbags83
Deadlocking, refer to
Locking28
Decommissioning the vehicle,
refer to Caring for your
vehicleDefect
– door lock30
– fuel filler flap188
– glass roof37
Defogging windows93
Defrosting the windows93
Defrosting windows and
removing condensation93
Defrosting windshield, refer to
Defrosting windows93
Defrost position, refer to
Defrosting windows93
Destination, entering by town/
city name117
Destination address
– entering117,123
Destination entry via BMW
Assist121
Destination for navigation
– entering by voice123
– entering via map122
– entry117
– home address120
– manual entry117
Destination guidance126
– bypassing a route
section127
– changing specified
route126
– continuing126
– starting126
– voice instructions127
– volume of voice
instructions128
Differential, breaking in108
Digital clock
63
Digital compass98
Digital radio, refer to HD
Radio140
Dimensions223
Directional indicators, refer to
Turn signals59
Direction instructions, refer to
Voice instructions127
Directory for navigation, refer
to Address book119
Displacement, refer to Engine
data222Display, refer to Control
Display16
Display lighting, refer to
Instrument lighting89
Displays, refer to Instrument
cluster12
Displays and controls10
Disposal
– of coolant201
– remote control battery35
– vehicle battery213
Distance, refer to
Computer65
Distance remaining to service,
refer to Service
requirements67
Distance to destination, refer
to Computer65
Distance warning, refer to
Park Distance Control
PDC75
Door key, refer to Integrated
key/remote control26
Door lock29
Door lock, confirmation
signals28
Doors, emergency
operation30
DOT Quality Grades194
Draft-free ventilation94
Drinks holders, refer to
Cupholders100
Drive-off assistance, refer to
DSC76
Drive-off assistant77
Driving lamps, refer to Parking
lamps/low beams86
Driving notes108
Driving off on hills, refer to
Drive-off assistant77
Driving stability control
systems76
Driving through water110
Driving tips, refer to Driving
notes108
Dry air, refer to Cooling
function93
DSC Dynamic Stability
Control76