Page 124 of 303

122Instruments and controls
On Uplevel display press 9 on the
steering wheel to confirm a message.
Vehicle and service messages
The vehicle messages are displayed
as text. Follow the instructions given
in the messages.
Messages in the Info Display
Some important messages may
appear additionally in the
Info Display. Some messages only pop-up for a few seconds.
Warning chimes
If several warnings appear at the
same time, only one warning chime
will sound.
When starting the engine or whilst driving
The warning chime regarding not
fastened seat belts has priority over
any other warning chime.
● If seat belt is not fastened.
● If a door or the tailgate is not fully
closed when starting off.
● If a certain speed is exceeded with parking brake applied.
● If adaptive cruise control deactivates automatically.
● If approaching a vehicle ahead too closely.
● If a programmed speed or speed
limit is exceeded.
● If a warning message appears in the Driver Information Centre.
● If the electronic key is not in the passenger compartment.● If the parking assist detects an object.
● If an unintended lane change occurs.
● If the exhaust filter has reached the maximum filling level.
● If safety function of the power tailgate detects obstacles in the
moving area.
When the vehicle is parked and / or the driver's door is opened
● With exterior lights on.
During an Autostop ● If the driver's door is opened.
● If any condition for an Autostop is
not fulfilled.
Battery voltage When the vehicle battery voltage is
running low, a warning message will
appear in the Driver Information
Centre.
Page 136 of 303

134LightingCurve light
Particular LEDs, based on steering
angle and speed, are additionally
triggered to improve lighting in
curves. This function is activated at
speeds from 25 mph to 43 mph and
reacts to steering angle.
Cornering light
When turning off, depending on the
steering angle and the turn lights, particular LEDs are triggered which
illuminate the direction of travel. It is
activated up to a speed of 25 mph.
Reverse parking function
To assist driver's orientation when
parking, both corner lights and
reversing light illuminate when
headlights are on and reverse gear is
engaged. They remain illuminated for
a short time after disengaging reverse gear or until driving faster than
4 mph in a forward gear.
Automatic headlight levelling
To prevent oncoming traffic from
being dazzled, headlight levelling is
automatically adjusted based on
inclination information measured by
front and rear axle, acceleration or
deceleration and vehicle speed.
Headlights when driving abroad 3 132.
Fault in LED headlight system
When the system detects a failure in
the LED headlight system, it selects a
preset position to avoid dazzling of
oncoming traffic. A warning is
displayed in the Driver Information
Centre.Hazard warning flashers
Operated by pressing ¨.
The illustrations show different
versions.
In the event of an accident with airbag
deployment, the hazard warning
flashers are activated automatically.
Page 137 of 303

Lighting135Turn lightsup:right turn lightdown:left turn light
A resistance point can be felt when
moving the lever.
Constant flashing is activated when
the lever is being moved beyond the
resistance point. It is deactivated
when the steering wheel is moved in
the opposite direction or lever is
manually moved back to its neutral
position.
Activate temporary flashing by
holding the lever just before the
resistance point. Turn lights will flash
until lever is being released.
To activate three flashes, tap the
lever briefly without passing the
resistance point.
With a trailer connected, turn light
flashes six times and tone frequency changes.
Front fog lights
Operated by pressing >.
Light switch in position AUTO:
switching on front fog lights will switch headlights on automatically.
Rear fog light
Operated by pressing ø
.
Light switch in position AUTO:
switching on rear fog light will switch
headlights on automatically.
Light switch in position 8: rear fog
light can only be switched on with
front fog lights.
Page 141 of 303

Lighting139Exit lighting is switched off
immediately if the indicator lever is
pulled while the driver's door is open.LED headlights
Path lighting is activated, when the
ignition is switched off and the driver's door is opened.
This function can be activated or
deactivated in the vehicle
personalisation.
Select the relevant setting in Settings
I Vehicle in the Info Display.
Info Display 3 120.
Vehicle personalisation 3 123.
The settings can be saved for the key being used 3 24.
Battery discharge protection
Vehicle battery state of charge
function
The function guarantees longest
vehicle battery life via a generator
with controllable power output and
optimised power distribution.
To prevent discharge of the vehicle
battery when driving, the following
systems are reduced automatically in two stages and finally switched off:
● auxiliary heater
● heated rear window and mirrors
● heated steering wheel
● heated mirrors
● heated seats
● fan
In the second stage, a message
which confirms the activation of the
vehicle battery discharge protection
will be displayed in the Driver
Information Centre.
Switching off electric lights
To prevent discharge of the vehicle
battery when the ignition is switched off, some interior lights are switched
off automatically after some time.
Page 142 of 303

140Climate controlClimate controlClimate control systems.............140
Air conditioning system ...........140
Electronic climate control system .................................... 142
Auxiliary heater ........................148
Air vents ..................................... 148
Adjustable air vents .................148
Fixed air vents ......................... 148
Maintenance .............................. 149
Air intake ................................. 149
Air conditioning regular operation ................................ 149
Service .................................... 149Climate control systems
Air conditioning system
Illustration shows functions which
may not be available for your
particular vehicle.
Controls for: ● Fan speed E
● Temperature
● Air distribution §,x and y
● Air conditioning A/C
● Demisting and defrosting %
● Air recirculation n
● Heated rear window and exterior
mirrors f
● Heated seats ß
Heated rear window Ü 3 44.
Heated exterior mirrors Ü 3 40.
Heated seats ß 3 55.
Ventilated seats A 3 55.
Heated steering wheel A 3 92.
Cooling A/C
Press A/C to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Page 145 of 303
Climate control143● Heated rear window and exteriormirrors f
● Dual zone temperature synchronisation SYNC
● Heated seats q
● Fan speed increase y and
decrease x
● Ventilated seats r
● Steering wheel heating Z
● Automatic mode AUTO
Heated rear window f 3 44.
Heated exterior mirrors Ü 3 40.
Heated seats q 3 55.
Ventilated seats r 3 55.
Heated steering wheel Z 3 92.
Each change of settings is shown in
the Info Display for a few seconds.
The electronic climate control system
is only fully operational when the
engine is running.
Automatic mode AUTO
Basic settings for automatic control
with maximum comfort:
● Press AUTO, the air distribution
and fan speed are regulated
automatically.
● Open all air vents to allow optimised air distribution in
automatic mode.
Page 152 of 303

150Driving and operatingDriving and
operatingDriving hints ............................... 151
Control of the vehicle ...............151
Steering ................................... 151
Starting and operating ...............151
New vehicle running-in ............151
Ignition switch positions ...........151
Power button ........................... 152
Retained power off ..................154
Starting the engine ..................154
Overrun cut-off ........................ 156
Stop-start system ....................156
Parking .................................... 159
Engine exhaust .......................... 161
Exhaust filter ............................ 161
Catalytic converter ...................162
AdBlue ..................................... 162
Automatic transmission ..............165
Transmission display ...............166
Gear selection ......................... 166
Manual mode ........................... 167
Electronic driving programmes 167
Fault ........................................ 168
Interruption of power supply ....168Manual transmission ..................169
Brakes ........................................ 169
Antilock brake system .............169
Parking brake .......................... 170
Brake assist ............................. 172
Hill start assist ......................... 172
Ride control systems .................172
Traction Control system ..........172
Electronic Stability Control ......173
Driver assistance systems .........175
Cruise control .......................... 175
Speed limiter ........................... 177
Adaptive cruise control ............178
Forward collision alert .............186
Following distance indication ...188
Active emergency braking .......189
Front pedestrian protection .....192
Parking assist .......................... 194
Side blind spot alert .................202
Rear view camera ...................203
Traffic sign assistant ................205
Lane keep assist .....................209
Fuel ............................................ 211
Fuel for petrol engines .............211
Fuel for diesel engines ............213
Refuelling ................................ 213
Trailer hitch ................................ 215
General information .................215Driving characteristics and
towing tips .............................. 216
Trailer towing ........................... 216
Towing equipment ...................217
Trailer stability assist ...............220
Page 153 of 303

Driving and operating151Driving hints
Control of the vehicle
Never coast with engine not
running
Many systems will not function in this
situation ( e.g. brake servo unit, power
steering). Driving in this manner is a danger to yourself and others.
All systems function during an
Autostop.
Stop-start system 3 156.
Idle boost
If charging of the vehicle battery is
required due to battery condition, the
power output of the generator must be increased. This will be achieved by an idle boost which may be audible.
A message appears in the Driver
Information Centre.
Pedals
To ensure the pedal travel is
uninhibited, there must be no mats in
the area of the pedals.Use only floor mats, which fit properly and are fixed by the retainers on the
driver side.
Steering If power steering assist is lost
because the engine stops or due to a system malfunction, the vehicle can
be steered but may require increased
effort.Starting and operating
New vehicle running-in Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system. Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period, fuel and engine oil consumption may be
higher.
Additionally, the cleaning process of
the exhaust filter may take place more
often.
Exhaust filter 3 161.
Ignition switch positions
Turn key: