2018 BMW 3 SERIES GRAN TURISMO Owners Manual

Display
in
the
instrument
display'ySymbol orange: system is actij
vated.'yGreen symbol: at least one lane
marking was detected and warnj
ings can be issued.
Issued
warning
If
you
leave
the
lane
If you leave the lane and if a lane marking has
been detected, the steering wheel vibrates.
If the turn signal is set before changing the lane, a warning is not issued.
End
of
warningThe warning is canceled in the following situaj
tions:
'yAutomatically after approx. 3 seconds.'yWhen returning to your own lane.'yWhen braking hard.'yWhen using the turn signal.
System
limits
Safety
information WARNING
The system can react not at all, too late,
incorrectly, or without justification due to the system limits. There is a risk of accidents or
risk of damage to property. Follow the informaj
tion regarding the system limits and actively
intervene, if needed.'

Before you change lanes after setting the turn
signal, the system issues a warning in the sitj
uations described above.
The light in the exterior mirror housing flashes
and the steering wheel vibrates.
Safety
information WARNING
The system does not relieve from perj
sonal responsibility to assess visibility and trafj fic situation. There is a risk of an accident. Adjjust driving style to traffic conditions. Watchtraffic closely and actively intervene where apj
propriate.'

and the lamp in the exterior mirror housing
flashes brightly.
The warning stops when the turn signal is switched off, or the other vehicle leaves the
critical zone.
Brief
flashing
A brief flashing of the lamp during vehicle unj
locking serves as system self-test.
System
limits
Safety
information WARNING
The system can react not at all, too late,
incorrectly, or without justification due to the system limits. There is a risk of accidents orrisk of damage to property. Follow the informaj
tion regarding the system limits and actively intervene, if needed.'

'yPersonal driving style, e.g., steering behavj
ior.'yDriving conditions, e.g., length of trip.
Starting at approximately 43 mph/70 km/h, the
system is active and can display a recommenj dation to take a break.
Break
recommendation
If the driver becomes less alert or fatigued, a
message is displayed in the Control Display
with the recommendation to take a break.
A recommendation to take a break is displayed
only once during an uninterrupted trip.
After a break, another recommendation to take
a break cannot be displayed until after approxij
mately 45 minutes.
System
limits
The function may be limited in the following
situations, e.g., and will either output an incorj
rect warning or no warning at all:
'yWhen the clock is set incorrectly.'yWhen the vehicle speed is mainly below about 43 mph/70 km/h.'yWith a sporty driving style, such as duringrapid acceleration or when cornering fast.'yIn active driving situations, such as when
changing lanes frequently.'yWhen the road surface is poor.'yIn the event of strong side winds.
The system is reset approx. 45 minutes after
parking the vehicle, e.g., in the case of a break during longer trips on highways.
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Driving
stability
control
systemsVehicle
features
and
optionsThis chapter describes all standard, country-specific and optional features offered with theseries. It also describes features that are notnecessarily available in your vehicle, e. g., due
to the selected options or country versions.
This also applies to safety-related functions
and systems. When using these functions and systems, the applicable laws and regulations
must be observed.
Anti-lock
Braking
System
ABS
ABS prevents locking of the wheels during
braking.
The vehicle maintains its steering power even during full brake applications, thus increasing
active safety.
ABS is operational every time you start the enj gine.
Brake
assistant When you apply the brakes rapidly, this systemautomatically produces the greatest possible
braking force boost. It reduces the braking disj
tance to a minimum during emergency stop.
This system utilizes all of the benefits provided
by the Antilock Brake System ABS.
Do not reduce the pressure on the brake pedal
for the duration of the emergency stop.DSC
Dynamic
Stability
Control
Concept
Within the physical limits, the system helps to
keep the vehicle on a steady course by reducj
ing engine speed and by applying brakes to
the individual wheels.
General
information
DSC detects the following unstable driving conditions, for instance:'yFishtailing, which can lead to oversteering.'yLoss of traction of the front wheels, which
can lead to understeering.
Dynamic Traction Control DTC, refer to
page 150, is a version of the DSC where forj
ward momentum is optimized.
Safety
information WARNING
The system does not relieve from perj
sonal responsibility to assess the traffic situaj tion. Based on the limits of the system, it canj
not independently react to all traffic situations.
There is a risk of an accident. Adjust driving
style to traffic conditions. Watch traffic closely
and actively intervene where appropriate.'

Overview
Button
in
the
vehicle
DSC OFF button
Indicator/warning
lights The indicator lamp flashes: DSC conj
trols the drive and braking forces.
The indicator lamp lights up: DSC has
malfunctioned.
Deactivating
DSC:
DSC
OFF
General
information When DSC is deactivated, driving stability is
reduced during acceleration and when driving in curves.
To increase vehicle stability, activate DSC again as soon as possible.
Deactivating
DSC Press and hold this button but not lonjger than approx. 10 seconds, until the
indicator light for DSC OFF lights up in the inj
strument cluster and displays DSC OFF.
DSC is switched off.
The steering and, depending on the equipj
ment, suspension are tuned for sporty driving.
Activating
DSC Press button.
DSC OFF and the DSC OFF indicator lamp goout.
Indicator/warning
lights When DSC is deactivated, DSC OFF is disj
played in the instrument cluster.
The indicator lamp lights up: DSC is
deactivated.
DTC
Dynamic
Traction
Control
Concept
DTC is a version of the DSC Dynamic Stability Control where forward momentum is optij mized.
The system ensures maximum headway on
special road conditions or loose road surfaces,
for instance unplowed snowy roads, but with
somewhat limited driving stability.
When DTC is activated, the vehicle has maxij
mum traction. Driving stability is limited during
acceleration and when driving in curves.
Drive carefully.
You may find it useful to briefly activate DTC
under the following special circumstances:'yWhen driving in slush or on uncleared,
snow-covered roads.'yWhen freeing vehicle from deep snow or driving off from loose ground.'yWhen driving with snow chains.
Deactivating/activating
DTC
Dynamic
Traction
Control
Activating
DTC Press button.
TRACTION is displayed in the instruj
ment cluster and the indicator light for DSC OFF lights up.
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stability
control
systems150
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Deactivating
DTCPress button again.
TRACTION and the DSC OFF indicaj
tor light go out.
xDrive xDrive is the all-wheel-drive system of your vej
hicle. Concerted action by the xDrive and DSC
Dynamic Stability Control further optimizes
traction and driving dynamics. The xDrive all-
wheel-drive system variably distributes the
drive forces to the front and rear axles as dej
manded by the driving situation and road surj
face.
Dynamic
Damping
Control
Concept
This system reduces undesirable vehicle moj tion when using a dynamic driving style or travj
eling on uneven road surfaces.
This enhances the driving dynamics and drivj
ing comfort depending on the road surface
condition and driving style.
ProgramsThe system offers several different programs.
The programs can be selected via Driving Dyj namics Control.
SPORT Consistently sporty control of the shock abj
sorbers for greater driving agility.
SPORT+ Consistently sporty control of the shock abj
sorbers for greater driving agility when driving with limited driving stabilization.COMFORT/ECO
PRO
Balanced control of the vehicle.
Variable
sport
steering The support offered by the variable sport
steering changes according to the angle by
which the steering wheel has been turned and
the speed.
So, for instance the steering angle of the front wheels is made larger when parking or taking
tight corners. This makes it easier to drive
around bends.
Furthermore, the system provides the steering with more support at low speeds than at higher ones. This makes it easier to park, for instance,and makes steering more direct when drivingat faster speeds.
By taking the angle by which the steering wheel has been turned and the speed into acjcount, a sporty steering response adapted tothe particular driving situation can be achieved.
Active
rear
spoiler
Concept
The active rear spoiler increases driving stabilj ity. The rear spoiler extends and retracts autoj
matically depending on the driving speed.
General
information
When using automatic vehicle washes, ensure that the rear spoiler is retracted.
Clean the rear spoiler compartment regularly.
Observe information on automatic washing systems or vehicle washes, refer to page 265,
and caring for special components, refer to page 267.Seite 151Driving
stability
control
systemsControls151
Online Edition for Part no. 01402981529 - VI/17

Safety
informationNOTE
If the rear spoiler is hindered when exj
tending and retracting, it can be damaged.
There is a risk of property damage. Make sure
that the rear spoiler can move freely, e.g., keep it free of ice.'