The system behaves differently than expected
How to know if the vehicle has Travel Assist
The vehicle has Travel Assist if the multifunction
steering wheel has the button
.
— Periodically clean the field of vision of the
camera and keep it clean, free of snow and ice.
indications on the screen
— Do not cover the field of view of the camera.
— Check that the windscreen is not damaged by the area
of the camera's field of view.
— Do not mount any object on the steering wheel.
If you have any doubts or questions, contact a specialized
workshop.
driving assistant
(Travel Assist)
Introduction to the topic
Fig. 142 On the instrument panel screen: display with
active regulation.
The driving assistant (Travel Assist) combines
adaptive cruise control (ACC) and the adaptive lane
guidance function. Within the limitations of the system,
the vehicle can maintain a distance from the preceding
vehicle preselected by the driver and remain in the
preferred position within the lane.
1 The adaptive lane guidance function is
active.
2 Adjusted distance, no vehicle is detected ahead.
In addition, control lamps indicate the status of the system
on the instrument panel display:
Active Travel Assist, adaptive cruise control and
adaptive lane guidance are active.
Travel Assist uses the same sensors as Adaptive Cruise
Control (ACC) and Lane Assist. Therefore, please read
Active Travel Assist, active adaptive cruise control
and passive adaptive lane guidance.
the information on ACC carefully ÿ p. 165 and Lane Assist
ÿ p. 176 and note the limitations of the systems and the
instructions given there.
Active Travel Assist, passive adaptive cruise
control and active adaptive lane guidance.
Active Travel Assist, adaptive cruise control and
Speed range Travel
passive adaptive lane guidance.
Assist regulates speeds between approx. 30 km/h (approx.
20 mph) and approx. 210 km/h (approx. 130 mph); in the
Active Travel Assist
case of the adaptive lane guidance function, between 0 km/
h (0 mph) and approx. 250 km/h (approx. 155 mph). This
range may vary depending on the market.
Driver intervention request
If you take your hands off the steering wheel, after a few
seconds the system prompts you to take over the steering
with an indication on the instrument panel display and
acoustic warnings.
Driving with Travel Assist
Travel Assist automatically controls the accelerator pedal,
brakes and steering. In addition, Travel Assist can, within
If you do not react to this request, the system warns you by
causing a brief jerk on the brakes and a brief tightening of
the belt. The Travel Assist is then switched off or the
Emergency Assist is switched on (depending on equipment).
its limitations, accelerate the vehicle to a stop behind a
stopped vehicle and automatically resume driving.
You can override the Travel Assist setting at any time.
178
Driver assistance systems
WARNING
Manage the Travel Assist
The intelligent technology of Travel Assist cannot overcome
,
Please note on
page 178.
at the beginning of this chapter,
the limits imposed by the laws of physics and only works within
the limits of the system. If the Travel Assist is used carelessly or
inadvertently, accidents and serious injuries may occur. The
system cannot replace the driver's attention.
· Be aware of system limitations and guidance on Adaptive
Cruise Control (ACC) and Lane Assist.
· Always adapt your speed and distance from the vehicle in
front according to visibility, weather, road and traffic
conditions.
· Never use Travel Assist in poor visibility, on steep, curvy or
slippery sections (eg in the event of snow, ice, rain or loose
gravel), or on flooded roads.
Fig. 143 Left side of the multifunction steering wheel:
buttons for operating Travel Assist.
· Never use the Travel Assist off-road or on roads that are not
firm ground. Travel Assist is intended for use on paved roads
only.
To connect
— Press the key
of the multifunction steering wheel.
The control indicator lights up green. In addition, a warning
The Travel Assist does not react to people or
appears on the instrument panel display. Travel Assist maintains
the current speed and the preset distance to the vehicle ahead. At
animals, or before vehicles that cross each other or that are
approaching from the opposite direction in the same lane.
the same time, if it detects road markings, it keeps the vehicle in
the lane by moving the steering wheel.
Brake immediately if Travel Assist does not re
Slow down enough.
· Brake immediately when a warning is displayed.
Brake indication on the instrument panel display.
stop regulation
— Briefly press the brake button.
or step on the foot pedal
· Brake when, after an indication to brake, the vehicle rolls
without this being desired.
The set distance remains saved.
· Always keep your hands on the wheel so you can control the
direction at all times.
Making other settings
Otherwise, Travel Assist is operated like ACC ÿ p. 168.
The driver is always responsible for keeping the vehicle in
its lane.
· If the instrument cluster display requests driver intervention,
immediately take control of the vehicle.
Problems and solutions
· Always be prepared to regulate yourself my
my speed
,
Please note on
page 178.
at the beginning of this chapter,
Travel Assist is not available or does not work as expected
— There is a fault in the sensors. Check the causes and
solutions described in the ACC chapters ÿ p. 169 or Lane
Assist ÿ p. 177.
3 G 0 0 1 2 7 6 0 A H
— System limits are exceeded.
driving assistant
179
— If the problem persists, go to a specialized workshop
lyzed.
Shortly after actively regulating the emergency assist, the
emergency flashers are switched on to warn other road users.
Take control of the direction
O
In vehicles with lane change assistant (Side Assist) and
The warning lamp lights up white or red, depending on the
urgency of your intervention.
assisted parking system (Park Assist), the following maneuver
is also possible: if the emergency assistant has detected ideal
conditions, within its limitations it can steer the vehicle to the
side lane or shoulder and to have it completely. Once the vehicle
has stopped, the parking brake is automatically engaged.
Also, a message is displayed.
— You have released the steering wheel for a few seconds.
Grab the steering wheel and take control of the vehicle.
— System limits have been reached. Grab the steering wheel and
take control of the vehicle.
electronic control ÿ p. 185.
Travel Assist switches off automatically
The regulation of the system can be canceled at any time by
moving the steering wheel or pressing a pedal.
— Vehicles without Emergency Assist You have let go of the
wheel for long enough.
Requirements
— Malfunction. Go to a special workshop
cialized.
— Lane Departure Assist (Lane As
syst) and adaptive cruise control (ACC) are engaged.
Regulation is interrupted unexpectedly
— You have turned on the blinker.
— The selector lever is in the D/S position or in the
Tiptronic selection track.
— The system has detected a lane boundary line on both sides
of the vehicle.
emergency assistant
(Emergency Assist)
Switching the emergency assistant on and off (Emergency
Assist)
The emergency assistant (Emergency Assist) is always activated
when the ignition is switched on if the necessary requirements
are met.
Emergency Assist can detect driver inactivity and keep
the vehicle in its lane, bringing it to a complete stop if
necessary. In this way the system can actively help to avoid
an accident or to reduce its consequences.
The regulation of the system can be canceled at any time by
moving the steering wheel or pressing a pedal.
WARNING
The intelligent technology of the emergency assistant
(Emergency Assist) cannot overcome the limits imposed by
Emergency Assist combines the functions of Lane Departure
Warning Assist (Lane Assist) and Adaptive Cruise Control (ACC).
physical laws and only works within the limits of the system.
The driver is always responsible for driving the vehicle.
Read and observe the instructions and information on these
systems, especially regarding their limitations.
· Always adapt the speed and the safety distance with respect
to the preceding vehicle depending on the visibility, weather,
road and traffic conditions.
Functioning
If the assistant for emergencies (Emergency Assist) detects that
the driver is not carrying out any activity, it asks him to take
control of the vehicle. To do this, it emits optical and acoustic
warnings and triggers braking jerks.
· The emergency attendant cannot always prevent accidents
and serious injuries by itself.
If the cruise control radar sensor
(ACC) or the Lane Assist camera are covered or out of
adjustment, the system may intervene on the brakes or
steering inopportunely.
Depending on equipment, if the driver is still inactive, the seat
belt tightens to keep the driver in position. The system brakes the
vehicle and keeps it in its lane.
180
Driver assistance systems