
Water or water vapour under the vehicle
If the humidity and temperature outside the
v
ehicle are high, condensation can drip off
the evaporator in the cooling system and
form a pool underneath the vehicle. This is
normal and does not indicate a leak.
If the outside humidity is high and the out-
side temperature low, condensation may
evaporate through the stationary air condi-
tioning when it is running. If this is the case,
steam may appear underneath the vehicle.
This is not a sign that the vehicle is damaged.
Touch panels react differently than expected
Moisture, dirt and grease can impede the
functioning of the touch panels.

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). 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

If you adjust the announced speed excessive-
ly, predictiv
e cruise control will be termina-
ted.
If a speed limit is detected, the predic-
tive cruise control function will adjust
the stored speed even if ACC is deactivated.
However, speed regulation will not take
place.
If the current speed significantly ex-
ceeds a speed limit detected by the
Dynamic Road Sign Display function, a warn-
ing will appear on the instrument cluster dis-
play.
When you join a motorway without
a speed limit, the recommended speed
will automatically be stored as the desired
speed. If a higher speed has previously been
stored on a motorway without a speed limit,
this will be adopted instead of the recom-
mended speed. Troubleshooting
Please refer to at the start of the chap-
ter on page 156.
A message is displayed that predictiv
e cruise
control is currently not available or is not
available in your country.

The yellow indicator lamp flashes if a pos-
sible critical situation is detected when you
indicate in the direction of the detected v
ehi-
cle.
The faster another vehicle approaches, the
earlier there is a corresponding display in the
exterior mirror.
Lane change system “Side Assist Plus”
If the vehicle is equipped with a lane keeping
system (Lane Assist) and the system is
switched on, the driver is warned by a correc-
tive steering intervention when changing
lanes during a possible critical situation (in-
formation level, warning level). The steering
intervention also occurs when the turn signal
is activated for the corresponding direction. If
the steering intervention is overridden by the
driver, the steering wheel vibrates to give an
additional warning. For this, steering wheel
vibration must be activated in the Assist sys-
tems menu in the Infotainment system.
Automatic deactivation
The lane change system will switch off auto-
matically if the radar sensors are permanent-
ly covered. This can be caused by a layer of
ice or snow in front of the radar sensor, for
example.
A text message will be shown on the instru-
ment cluster display.
If you use the factory-fitted trailer towing
coupling and have set up the necessary elec-
trical connection, the lane change system
switches off automatically. After you have
disconnected the electrical connection, the
lane change system is switched back on au-
tomatically.
If the trailer towing coupling is not factory-
fitted, you must manually switch off the lane
change system and then switch it back on
again.
Brightness
The brightness of the visual display will
change automatically depending on the am-
bient light levels. You can adjust the basic brightness of the
display in the Assist systems menu in the In-
f
otainment system. The lane change system
is not active during the setting procedure. Troubleshooting
Please refer to at the start of the chap-
ter on page 172. Lane change system fault.
The indicator lamp lights up yellow. The yel-
low central warning lamp also lights up.

Grey globe: it is not currently possi-
ble to establish a connection to the
Internet or a connection is currently
being set up. Signal strength display of the
eSIM with a
vailable mobile com-
munication standard.
Legally required services can influence the
status display for data transmission inde-
pendently of activated offline mode.
Even if offline mode is activated, on-
line mode can be activated briefly by
safety-relevant and legally required services.
No We Connect Start services are activated
and no data of these services is transmitted
during this time. Offline mode will be reacti-
vated and the eSIM deactivated again after
successful transfer of the safety-relevant or
legally required data. Effects on online vehicle func-
tions
If data transf
er is restricted, the following
online function cannot be executed, for ex-
ample.
Online vehicle functions