Position engaged and ECO assistance deac-
tiv
ated: no brake energy recuperation.
Position engaged and ECO assistance acti-
v
ated: automatic brake energy recuperation.
The energy recovery level is selected auto-
matically depending on the navigation data
and traffic situation.
Position engaged: high brake energy recu-
peration
The v
ehicle also performs recuperation when
the brake pedal is pressed.
Eco assistance
The ECO assistance function helps the driver
to use the engine braking effect of the vehi-
cle efficiently. It selects the energy recovery
level depending on the navigation data and
traffic situation.
The ECO assistance function can be switched
on and off in the vehicle settings in the Info-
tainment system.
Driving down hills
When driving down hills, you should drive in
position B if possible.
Never allow the vehicle to roll down moun-
tains or hills in the neutral position N. WARNING
The higher the charge level of the high-
v
oltage battery, the lower the engine brak-
ing effect, to the point where no engine
braking effect may be generated at all. This
puts more strain on the vehicle brake.
x Never fully charge the high-voltage bat-
tery at high elevations, e.g. at the top of
a pass, in order to facilitate a braking ef-
fect by means of recuperation when de-
scending.
x Reduce your speed before driving down
a long, steep gradient.
x When driving down a long, steep gradi-
ent, slow the vehicle using the vehicle
brake. Troubleshooting
Deactivation of the drive is imminent
The charge level of the high-voltage battery
is too low.
The indicator lamp lights up during v
ehicle
operation.
The indicator lamp lights up red.
A text message is shown on the ID. Cockpit
Automatically switching on the side lights
If the headlights are switched on at the time
the ignition is automatically deactiv
ated, the
side lights are switched on either until the
vehicle is locked or for no more than about
15 minutes. WARNING
When leaving the vehicle, always ensure
that the electronic parking brake is switch-
ed on and that all doors, windows, the boot
lid and bonnet are completely closed and
locked. Electronic immobiliser
The immobiliser helps to pre
vent the vehi-
cle
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.
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
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
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.