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sistance when steering in some critical
driving situations. The driv
er must steer the
vehicle at all times. Counter steering assis-
tance does not steer the vehicle. Troubleshooting
Steering fault
The warning lamp lights up or flashes red.
There is a fault in the electromechanical
steering or electronic steering column lock.
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2. Swipe to the left or right to select the
desired system.
3.
Press the button.
Troubleshooting
Please refer to at the start of the chap-
ter on page 145. Fault in the cruise control system.
The indicator lamp lights up yellow.
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Adaptive Cruise Control
(ACC)
Introduction to the topic
The Adaptive Cruise Control (ACC) main-
tains a constant speed that you ha
ve set.
If the vehicle approaches a vehicle in
front, the ACC automatically adapts the
speed so that a distance you have selec-
ted is maintained.
Does the vehicle have ACC?
The vehicle is equipped with ACC if you can
adjust settings for ACC in the Assist systems
menu in the Infotainment system.
Speed range
You can set the speed between 20 km/h
(15 mph) and the maximum speed.
Driving with ACC
You can override the active ACC system at
any time. Cruise control will be stopped if you
brake. If you accelerate, cruise control will be
interrupted while you are accelerating and
then resumed.
The intervention by the ACC system is less
dynamic when towing a trailer.
Driver intervention prompt
If automatic deceleration by the ACC
system is not sufficient or the system
limits have been reached, the ACC
system will request you to also brake
by a corresponding message on the
instrument cluster. In addition, the
red warning lamp lights up and an
acoustic warning is given. Take over
control of the vehicle and be prepared
to brake.
Radar sensor
ACC detects driving situations using a radar
sensor at the front of the vehicle. The range of the radar sensor is up to approximately
160 m (
around 520 ft). WARNING
The intelligent ACC technology cannot
o
vercome the laws of physics, and func-
tions only within the limits of the system.
Never let the extra convenience tempt you
into taking safety risks when driving. Care-
less or unintentional use of ACC can cause
accidents or injuries. The system is not
a substitute for the full concentration of
the driver.
x Adapt your speed and the distance from
the vehicles ahead to suit visibility,
weather, road and traffic conditions.
x Never use the ACC in poor visibility, on
steep or winding roads, or on slippery
road surfaces, e.g. due to snow, ice,
moisture or loose chippings, or when
roads are flooded.
x Never use the ACC offroad or on unsur-
faced roads. The ACC is designed for use
on surfaced roads only.
x Take control of the vehicle immediately
if requested to do so by a prompt on the
instrument cluster display or if the speed
reduction by ACC is not sufficient.
x Brake if the vehicle starts moving unin-
tentionally, e.g. after a driver interven-
tion prompt.
x Be prepared to control the speed your-
self at all times. Special driving situations
Please refer to at the start of the chap-
ter on page 151.
Predictiv
e cruise control system
If the vehicle is equipped with the Dynamic
Road Sign Display function and an Infotain-
ment system with navigation, ACC can pre-
dictively adapt the vehicle speed to detected
speed limits and the course of the road ahead
Adaptive Cruise Control 151
11A012720AB
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Advance warning Urgent warning Automatic brak-
ingBraking interven-
tion
Vehicle also mov-
ing 30 to 250 km/h
(20 to 155 mph)30 to 250 km/h
(20 to 155 mph)5 to 250 km/h
(3 to 155 mph)5 to 250 km/h
(3 to 155 mph)
Pedestrian also
mo ving 30 to 85 km/h
(20 to 53 mph) 30 to 85 km/h
(20 to 53 mph)5 to 85 km/h
(3 to 53 mph)5 to 85 km/h
(3 to 53 mph)
Crossing pedes-
trian 30 to 85 km/h
(20 to 53 mph)-
5 to 65 km/h
(3 to 40 mph)5 to 65 km/h
(3 to 40 mph)
Cyclist also mov-
ing 30 to 250 km/h
(20 to 155 mph)30 to 250 km/h
(20 to 155 mph)5 to 250 km/h
(3 to 155 mph)5 to 250 km/h
(3 to 155 mph)
Crossing cyclist 30 to 85 km/h (20 to 53 mph)-
5 to 65 km/h
(3 to 40 mph)5 to 65 km/h
(3 to 40 mph)The values apply only under ideal conditions
and are appro
ximate values which depend on
the market and vehicle equipment. Please
contact a qualified workshop if you have any
queries about the equipment installed in your
vehicle.
Advance warning
The system detects a possible colli-
sion and prepares the vehicle for pos-
sible emergency braking.
An acoustic warning sounds and the red
warning lamp lights up. Brake or take avoid-
ing action.
Urgent warning
If the driver does not react to the advance
warning, the system may initiate a short
braking jolt in order to draw attention to the
increasing collision risk. Brake or take avoid-
ing action.
Automatic braking
If the driver also does not react to the urgent
warning, the vehicle can be braked automati- cally with braking force that increases in sev-
eral stages. The reduced speed means that it
is possible to minimise the consequences of
an accident.
Braking interv
ention
If the system detects that the driver is brak-
ing insufficiently when there is a risk of colli-
sion, the system can increase the braking
force and help prevent a collision. The brak-
ing intervention takes place only for as long
as the brake pedal is pressed hard.
Distance warning
The system detects when safety
is endangered by driving too
close to the vehicle in front. The indi-
cator lamp lights up. Increase the dis-
tance.
Speed range: around 65 km/h (around
40 mph) to around 250 km/h (around
155 mph). Area monitoring system 161
11A012720AB
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Limits of Front Assist
Please refer to at the start of the chap-
ter on page 159.
F
ront Assist is not available or its
functions are restricted immediately
after the vehicle is started. The indi-
cator lamp lights up in the instrument
cluster display during this time.
Front Assist has physical and system-related
limitations. You should therefore always be
prepared to take full control of the vehicle if
necessary.
Delayed response
If the camera or radar sensor is exposed to
environmental conditions that impair func-
tioning, the system may detect this only after
a certain delay. For this reason, any restric-
tions to functions may be displayed only after
a delay at the start of the journey and when
driving
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Troubleshooting
Please refer to at the start of the chap-
ter on page 159. Front Assist is starting up.
The indicator lamp lights up.
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Emergency Assist not available
The indicator lamp lights up yellow. A mes-
sage will also appear on the instrument clus-
ter display.
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