differential BMW 128I CONVERTIBLE 2012 Owners Manual

Controls
83Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
signal. Therefore, always drive cautiously; oth-
erwise, there is a risk of personal injury or prop-
erty damage.<
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 page118.
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vidual wheels.The laws of physics cannot be repealed,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
s a f e t y m a r g i n a g a i n b y t a k i n g r i s k s , a s t h i s c o u l d
result in an accident.<
Deactivating DSC
Press the button for at least 3 seconds until the
indicator lamp for DSC OFF lights up and DSC
OFF is displayed in the instrument panel.
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 lamp in the
instrument panel goes out.
For better control
If the indicator lamp flashes: the DSC
controls the driving and braking forces.
If the indicator lamp lights up: DSC and
DTC have failed.
The indicator lamp lights up and
DSC OFF is displayed in the instrument
panel: DSC is deactivated.

Things to remember when driving
116
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 257
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Convertible top
– convenient opening30
Convertible top care224
Coolant219
– checking level220
– filling220
Coolant temperature219
Cooling, maximum100
Cooling fluid, refer to
Coolant219
Copyright2
Corner-illuminating lamps95
Cornering light, refer to
Adaptive Light Control95
Country codes DVD157
Courtesy lamps98
Criteria for route134
Cross-hairs in navigation130
Cruise control68
Cruising range72
Cupholders108
Curb weight, refer to
Weights245
Current fuel consumption72
Current playback
– external devices168
– of music collection163
Customer Relations201
D
Dashboard, refer to
Cockpit10
Dashboard lighting, refer to
Instrument lighting98
Data, technical242
– capacities246
– dimensions243
– engine242
– weights245
Data memory222
Data transfer202
Date
– setting78
– setting format78
Daytime running lights, switch
positions95
DBC Dynamic Brake
Control83Deactivating front passenger
airbags91
Deadlocking, refer to
Locking30
Defect
– door lock32
– fuel filler flap206
– glass roof40
Defining a home address190
Defogging windows101
Defrosting windows101
Defrosting windows and
removing condensation101
Defrosting windshield, refer to
Defrosting windows101
Defrost position, refer to
Defrosting windows101
Destination, entering by town/
city name125
Destination address
– entering125,131
Destination entry via BMW
Assist129
Destination for navigation
– entering by voice131
– entering via map130
– entry125
– home address128
– manual entry125
Destination guidance134
– bypassing a route
section135
– changing specified
route134
– continuing134
– starting134
– voice instructions136
– volume of voice
instructions136
Differential, breaking in116
Digital clock70
,76
Digital compass106
Digital radio, refer to HD
Radio148
Dimensions243
Directional indicators, refer to
Turn signals66
Direction instructions, refer to
Voice instructions136Directory for navigation, refer
to Address book127
Displacement, refer to Engine
data242
Display, refer to Control
Display16
Displaying contact
pictures190
Display lighting, refer to
Instrument lighting98
Displays, refer to Instrument
cluster12
Displays and controls10
Disposal
– of coolant219
– remote control battery37
– vehicle battery232
Distance, refer to
Computer72
Distance remaining to service,
refer to Service
requirements74
Distance to destination, refer
to Computer72
Distance warning, refer to
Park Distance Control
PDC82
Door key, refer to Integrated
key/remote control28
Door lock32
Door lock, confirmation
signals30
Doors, manual operation32
DOT Quality Grades212
Draft-free ventilation102
Drinks holders, refer to
Cupholders108
Drive mode63
Drive-off assistance, refer to
DSC83
Drive-off assistant84
Driving dynamics control64
Driving lamps, refer to Parking
lamps/low beams94
Driving notes116
Driving off on hills, refer to
Drive-off assistant84
Driving stability control
systems83