20Keys, doors and windowsLock cylinders
Designed to free-wheel if they are
forcefully rotated without the correct
key or if the correct key is not fully
inserted. To reset, turn cylinder with
the correct key until its slot is vertical, remove key and then re-insert it. If the
cylinder still free-wheels, turn the key through 180° and repeat operation.
Key with foldaway key section
Press button to extend. To fold the
key, first press the button.
Car Pass
The Car Pass contains security
related vehicle data and should
therefore be kept in a safe place.
When the vehicle is taken to a
workshop, this data is required in
order to perform certain operations.
Radio remote control
Used to operate: ● central locking system
● anti-theft locking system
● anti-theft alarm system
● power windows
The radio remote control has a range of approx. five metres. It can be
restricted by external influences. The
hazard warning flashers confirm
operation.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Fault
If the central locking system cannot
be operated with the radio remote
control, the cause may be one of the
following:
● Fault in radio remote control.
● The range is exceeded.
● The battery voltage is too low.
● Frequent, repeated operation of the radio remote control while not
in range, which will require re-
synchronisation.
● Overload of the central locking system by operating at frequent
intervals, the power supply is
interrupted for a short time.
● Interference from higher-power radio waves from other sources.
Keys, doors and windows21Unlocking 3 22.
Basic settings Some settings can be changed in the
menu Settings in the Info-Display.
Vehicle personalisation 3 111.
Radio remote control battery
replacement
Replace the battery as soon as the
range is reduced.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Key with foldaway key section
Extend the key and open the unit.
Replace the battery (battery type CR 2032), paying attention to the
installation position. Close the unit
and synchronise.
Key with fixed key section
Have the battery replaced by a
workshop.
Radio remote control
synchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control will be
synchronised when the ignition is
switched on.
Memorised settings Whenever the key is removed from
the ignition switch, the following
settings are automatically memorised by the key:
● lighting
● Infotainment system (only CD 400)
● central locking system
● comfort settings
The saved settings are automatically
used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 139.
A precondition is that Personalization
by driver is activated in the personal
settings of the Graphic-Info-Display.
This must be set for each key used.
On vehicles equipped with
28Keys, doors and windowsStatus LED
Status LED is integrated in the central
locking button.
Status during the first 10 seconds of
anti-theft alarm system activation:
LED illuminates:test, arming delayLED flashes
quickly:doors, tailgate or
bonnet not
completely closed,
or system fault
Status after system is armed:
LED flashes
slowly:system is armed
Seek the assistance of a workshop in the event of faults.
Alarm
When triggered, the alarm horn
sounds and the hazard warning lights
flash simultaneously. The number
and duration of alarm signals are
stipulated by legislation.
The alarm can be silenced by
pressing any button of the radio
remote control or by switching on the
ignition.
The anti-theft alarm system can be
deactivated only by pressing c or by
switching on the ignition.
A triggered alarm, which has not been interrupted by the driver, will be
indicated by a warning message or a
warning code in the Driver
Information Centre after switching on
the ignition.
Vehicle messages 3 105.
If the vehicle's battery is to be
disconnected (e.g. for maintenance
work), the alarm siren must be
deactivated as follows: switch the
ignition on then off, then disconnect
the vehicle's battery within
15 seconds.Immobiliser
The system is part of the ignition
switch and checks whether the
vehicle is allowed to be started with
the key being used.
The immobiliser is activated
automatically after the key has been removed from the ignition switch.
If control indicator d flashes when the
ignition is on, there is a fault in the
system; the engine cannot be started. Switch off the ignition and then repeat the start attempt.
If control indicator d continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.
Notice
The immobiliser does not lock the
doors. You should always lock the
vehicle after leaving it and switch on
the anti-theft alarm system 3 22,
3 27.
Control indicator d 3 98.
32Keys, doors and windowsChild safety system for rear
windows
Press z to deactivate rear door
power windows, the LED illuminates.
To activate, press z again.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle.
Press and hold c to open windows.
Press and hold e to close windows.
Release button to stop window
movement.
Overload
If the windows are repeatedly
operated within short intervals, the
window operation is disabled for
some time.
Initialising the power windows If the windows cannot be closed
automatically (e.g. after
disconnecting the vehicle battery), a
warning message or a warning code
is displayed in the Driver Information
Centre.
Vehicle messages 3 105.
Activate the window electronics as
follows:
1. Close doors.
2. Switch on ignition.
3. Pull switch until the window is closed and keep pulling for
additional two seconds.
4. Repeat for each window.
Heated rear window
Operated by pressing Ü.
80Instruments and controlsInstruments and
controlsControls ....................................... 81
Steering wheel adjustment ........81
Steering wheel controls .............81
Heated steering wheel ...............81
Horn ........................................... 82
Windscreen wiper/washer .........82
Rear window wiper/washer .......84
Outside temperature ..................84
Clock ......................................... 85
Power outlets ............................. 86
Cigarette lighter ......................... 87
Ashtrays .................................... 87
Warning lights, gauges and indi‐ cators ........................................... 88
Instrument cluster ......................88
Speedometer ............................. 88
Odometer .................................. 88
Trip odometer ............................ 88
Tachometer ............................... 88
Fuel gauge ................................ 89
Fuel selector .............................. 89
Engine coolant temperature gauge ....................................... 89
Service display .......................... 90Control indicators ......................91
Turn signal ................................. 93
Seat belt reminder .....................94
Airbag and belt tensioners .........94
Airbag deactivation ....................94
Charging system .......................95
Malfunction indicator light ..........95
Service vehicle soon .................95
Brake and clutch system ...........95
Operate pedal ............................ 95
Electric parking brake ................96
Electric parking brake fault ........96
Antilock brake system (ABS) .....96
Upshift ....................................... 96
Variable effort steering ..............96
Ultrasonic parking assist ...........96
Electronic Stability Control off ...97
Electronic Stability Control and Traction Control system ...........97
Traction Control system off .......97
Preheating ................................. 97
Diesel particle filter ....................97
Tyre pressure monitoring system ...................................... 97
Engine oil pressure ....................98
Low fuel ..................................... 98
Immobiliser ................................ 98
Reduced engine power .............98
Exterior light .............................. 98
High beam ................................. 99Adaptive forward lighting ...........99
Fog light ..................................... 99
Rear fog light ............................. 99
Cruise control ............................ 99
Door open .................................. 99
Automatic locking ......................99
Information displays ...................100
Driver Information Centre ........100
Graphic-Info-Display, Colour- Info-Display ............................ 103
Vehicle messages ......................105
Warning chimes .......................107
Battery voltage ........................ 108
Trip computer ............................. 108
Vehicle personalisation ..............111
OnStar ....................................... 115
Instruments and controls87A further 12 volt power outlet is
located in the rear console.
Do not exceed the maximum power consumption of 120 watts.
With ignition off, the power outlets are
deactivated. Additionally the power
outlets are deactivated in the event of
low vehicle battery voltage.
Electrical accessories that are
connected must comply with the
electromagnetic compatibility
requirements laid down in
DIN VDE 40 839.
Do not connect any current-delivering
accessories, e.g. electrical charging
devices or batteries.
Do not damage the outlet by using
unsuitable plugs.
Stop-start system 3 141.Cigarette lighter
The cigarette lighter is located in the
front console.
Press in cigarette lighter. It switches off automatically once the element is
glowing. Pull out lighter.
Ashtrays
Caution
To be used only for ash and not for combustible rubbish.
The portable ashtray can be placed inthe cupholders.
Instruments and controls959Danger
Risk of fatal injury for a child using
a child restraint system together
with activated front passenger
airbag.
Risk of fatal injury for an adult
person with deactivated front
passenger airbag.
Charging system
p illuminates red.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.
Illuminates when the engine is
running
Stop, switch off engine. Vehicle
battery is not charging. Engine
cooling may be interrupted. The
brake servo unit may cease to be
effective. Seek the assistance of a
workshop.
Malfunction indicator light Z illuminates or flashes yellow.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.
Illuminates when the engine is
running
Fault in the emission control system. The permitted emission limits may be exceeded. Seek the assistance of a
workshop immediately.
Flashes when the engine is
running
Fault that could lead to catalytic converter damage. Ease up on the
accelerator until the flashing stops.
Seek the assistance of a workshop
immediately.
Service vehicle soon
g illuminates yellow.
Additionally a warning message or a
warning code is displayed.
The vehicle needs a service.
Seek the assistance of a workshop.
Vehicle messages 3 105.Brake and clutch system
Brake and clutch fluid level R illuminates red.
The brake and clutch fluid level is too low 3 175.9 Warning
Stop. Do not continue your
journey. Consult a workshop.
Operate pedal
- illuminates or flashes yellow.
Illuminates
Brake pedal needs to be depressed
to release the electric parking brake
3 150.
Clutch pedal needs to be depressed
to start the engine in Autostop mode.
Stop-start system 3 141.
Flashes
Clutch pedal needs to be depressed
for a main start of the engine 3 16,
3 140.
106Instruments and controlsNo.Vehicle message25Left front turn signal failure26Left rear turn signal failure27Right front turn signal failure28Right rear turn signal failure29Check trailer brake light30Check trailer reversing light31Check left trailer turn signal32Check right trailer turn signal33Check trailer rear fog light34Check trailer rear light35Replace battery in radio remote
control48Clean side blind zone alert
system53Tighten gas cap54Water in diesel fuel filter55Diesel particle filter is full
3 144No.Vehicle message56Tyre pressure imbalance on
front axle57Tyre pressure imbalance on
rear axle58Tyres without TPMS sensors
detected59Open and then close driver
window60Open and then close front
passenger window61Open and then close rear left
window62Open and then close rear right
window65Theft attempted66Service theft alarm system67Service steering wheel lock68Service power steering69Service suspension system70Service level control systemNo.Vehicle message71Service rear axle74Service AFL75Service air conditioning76Service side blind zone alert
system79Top up engine oil81Service transmission82Change engine oil soon83Service adaptive cruise control84Engine power is reduced89Service vehicle soon94Shift to park before exiting95Service airbag128Bonnet open134Park assist fault, clean bumper136Service parking assist