
Transmission position display
(DIRECT SELECT lever) ...................1
99
Transmission positions .................. 199
Automatic transmission emer-
gency running mode ......................... 204
Auxiliary heating/ventilation
Important safety notes .................. 176
Problem (display message) ............ 181
Remote control .............................. 177
Setting the departure time ............. 179
Switching on/off (on the centre
console) ......................................... 177
Axle load, permissible (trailer tow-
ing) ...................................................... 482 B
Bag hook ............................................ 376
Ball coupling
Folding in ....................................... 289
Folding out ..................................... 288
BAS (Brake Assist System) ................. 76
BAS PLUS with Cross-Traffic Assist (Brake Assist PLUS with Cross-
Traffic Assist)
Function/notes ................................ 77
Important safety notes .................... 77
Battery (high-voltage)
see High-voltage battery
Battery (key)
Checking .......................................... 94
Important safety notes .................... 93
Replacing ......................................... 94
Battery (vehicle)
Charging ........................................ 420
Display message ............................ 336
Important safety notes .................. 416
Jump starting ................................. 422
Belt
see Seat belts
Belt tensioner
Activation ......................................... 60
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 311
Display message ............................ 341
Notes/function .............................. 263
Trailer towing ................................. 264 see Active Blind Spot Assist
BlueTEC (AdBlue®) ............................ 474
BlueTEC®
Topping up AdBlue® ..................... .208
Bonnet
Active bonnet (pedestrian protec-
tion) ............................................... 394
Closing .......................................... .396
Display message ............................ 349
Important safety notes .................. 394
Opening ......................................... 395
Boot load (maximum) ........................ 478
Brake
EBD ................................................. .84
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 324
Note s............................................. 476
Brake force distribution, elec-
tronic
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive ........................................... 81
Display message ............................ 332
Brake pedal
Pedal resistance/pedal travel .......... 44
Brakes
ABS .................................................. 76
Adaptive Brake Assist ...................... 80
BAS .................................................. 76
BAS PLUS with Cross-Traffic
Assist ............................................... 77
Brake fluid (notes) ......................... 476
Display message ............................ 317
Driving tip s.................................... 217
Hill start assist ............................... 189
HOLD function ............................... 236
Important safety notes .................. 217
Parking brake ................................ 213
RBS (Recuperative Brake Sys-
tem) ................................................. 44
RBS warning lamp .......................... 364
Warning lamp ................................. 355
Breakdown
see Flat tyre
see Towing away 6
Index

Removing ........................................
.93
Emergency release
Driver's door .................................... 99
Emergency spare wheel
General notes ................................ 463
Important safety notes .................. 463
Inflating the collapsible spare
wheel ............................................ .464
Technical data ............................... 465
Emergency unlocking
Tailgate .......................................... 106
Vehicle ............................................. 99
Energy flow display ........................... 276
Engine
Display message ............................ 335
ECO start/stop function ................ 190
Engine number ............................... 470
Jump-starting ................................. 422
Running irregularl y......................... 193
Starting problems .......................... 193
Starting the engine with the key .... 188
Starting with the Start/Stop but-
ton ................................................. 188
Stopping ........................................ 212
Tow-starting (vehicle) ..................... 428
Warning lamp (engine diagnos-
tics) ............................................... 362
Engine electronics
Notes ............................................. 468
Problem (fault) ............................... 193
Engine oil
Additives ........................................ 476
Checking the oil level ..................... 396
Checking the oil level using the
dipstick .......................................... 396
Display message ............................ 337
Filling capacity ............................... 475
Notes about oil grade s................... 475
Notes on oil level/consumption .... 396
Topping up ..................................... 396
Viscosity ........................................ 476
Environmental protection
Returning an end-of-life vehicle ....... 24
ESP® (Electronic Stability Pro-
gram)
Activating/deactivating ................... 82
Characteristics ................................. 82
Deactivating/activating ................. 309 Display message ............................ 317
ETS/4ETS ........................................ 81
Function/note
s................................ 81
General notes .................................. 81
Important safety guidelines ............. 82
Trailer stabilisation .......................... 83
Warning lamp ................................. 359
ETS/4ETS (Electronic Traction Sys-
tem) ...................................................... 81
Exhaust
see Exhaust pipe
Exhaust pipe
Cleaning ......................................... 406
Exhaustive discharging (high-volt-
age battery) ....................................... 419
Extended overrun mode ................... 283
Exterior lighting
Cleaning ......................................... 404
see Lights
Exterior mirrors
Adjusting ....................................... 128
Anti-dazzle mode (automatic) ........ 129
Folding in/out (automatically )....... 128
Folding in/out (electrically) ........... 128
Out of position (troubleshooting) ... 129
Parking position ............................. 129
Resetting ....................................... 128
Storing settings (memory func-
tion) ............................................... 131 F
Fault message see Display messages
Features ............................................. 381
Filler cap
see Fuel filler flap
Fire extinguisher ............................... 411
First-aid kit ......................................... 410
Fitting a wheel
Fitting a wheel ............................... 446
Lowering the vehicle ...................... 447
Preparing the vehicle ..................... 442
Raising the vehicle ......................... 443
Removing a whee l.......................... 446
Securing the vehicle against roll-
ing away ........................................ 443 Index
11

Headlamp
Cleaning system (notes) ............... .477
Headlamp flasher .............................. 137
Headlamps
Misting up ...................................... 140
see Automatic headlamp mode
Heating
see Climate control
High-pressure cleaners .................... 402
High-voltage battery
Charge leve l................................... 276
Charging ........................................ 420
Charging (on-board computer) ....... 277
General notes .................................. 43
Vehicle fire ....................................... 43
Hill start assist .................................. 189
HOLD function
Activating ....................................... 237
Deactivating ................................... 237
Display message ............................ 342
Function/note s............................. 236
Horn ...................................................... 32
Hybrid drive
Displaying the total range .............. 279
Generated electrical energy ........... 279
Hybrid operation
AGILITY SELECT switch .................. 280
Automatic engine start (ECO
Start/Stop function) ...................... 283
Automatic engine switch-off (ECO
start/stop function) ....................... 283
Driving tips .................................... 281
ECO start/stop function ................ 282
Energy flow display ........................ 276
Extended overrun mod e................. 283
Fuel consumption .......................... 279
General notes ................................ 272
Important safety notes .................. 273
Manual gearshifting ....................... 281
Noiseless start ............................... 280
Operating (on-board computer) ..... 276
Overrun mode ................................ 283
Overview (instrument cluster) ........ 275
Power display (electric motor) ....... 275
Problems ....................................... 285
Pulling away ................................... 280
RBS (Recuperative Brake Sys-
tem) ............................................... 273 Resetting values (Audio 20) ........... 279
Resetting values (COMAND
Online) ........................................... 279
Starting the engine ........................ 279
Hybrid system
Automatic deactivation .................... 42
Danger of electric shock .................. 42
Display message ............................ 338
High-voltage battery ........................ 43
Important safety notes .................... 42
Manual deactivation ......................... 43
Opening the bonnet ......................... 44
Overview ........................................ 274
Problems (malfunctions) ................ 285
READY indicator ............................. 279
Warning lamp ................................. 364
Hybrid vehicle
Climate control (THERMATIC) ........ 157
Climate control
(THERMOTRONIC) .......................... 160
Hybrid vehicles
Important safety notes .................... 42 I
Ignition lock see Key positions
Immobiliser .......................................... 86
Indicator and warning lamp
Restraint system ............................ 361
Indicator and warning lamps
COLLISION PREVENTION ASSIST
PLUS .............................................. 365
Coolant .......................................... 362
Engine diagnostics ......................... 362
Indicator lamps
Display message ............................ 332
see Warning and indicator lamps
Indicators
see Turn signals
Insect protection on the radiator .... 396
Instrument cluster
Overview .......................................... 34
Power display ................................ 275
Warning and indicator lamps ........... 35
Instrument cluster lighting .............. 294
Intelligent Light System
Activating/deactivating ................. 313 Index
13

G
WARNING
If the housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. These are poisonous and caustic.
There is a risk of injury.
Avoid contact with the skin, eyes or clothing. Immediately rinse electrolyte splashes off
with water and seek medical attention
straight away.
! Exhaustive discharge caused by the vehi-
cle standing idle for lengthy periods can
damage the high-voltage battery.
If the vehicle is idle for lengthy periods, run
it for a few minutes once every six weeks to
charge up the high-voltage battery.
During the charging process, switch off all
electrical consumers, e.g. the automatic
climate control or the seat heating.
Information on charging the high-voltage bat-
tery (Y page 420).
Engine compartment Before opening the bonnet:
X Apply the electric parking brake.
X Shift the automatic transmission to park
position P.
X Switch the ignition off.
X Remove the key from the ignition lock.
or, in vehicles with KEYLESS-GO start-func-
tion or KEYLESS ‑GO
X Remove the Start/Stop button from the
ignition lock.
X Observe the warning notes on the risk of
electric shock (Y page 42).
X Observe the warning notes about the bon-
net (Y page 395). RBS driving safety system (Recupera-
tive Brake System)
RBS supports you when braking with an elec-
tronically-controlled brake boost mode and enables the recovery of kinetic energy (recu-
peration).
For further information on the RBS system
(Y page 273). Panic alarm
X
To activate: press!button :for
approximately one second.
An alarm sounds and the exterior lighting
flashes.
X To deactivate: press!button :
again.
or
X Insert the key into the ignition lock.
or, in vehicles with KEYLESS-GO start-func-
tion or KEYLESS ‑GO
X Press the Start/Stop button.
The key must be in the vehicle.
The panic alarm function is only available in
certain countries. Occupant safety
Introduction to the restraint system
The restraint system reduces the risk of vehi- cle occupants coming into contact with parts
of the vehicle's interior in the event of an
accident. The restraint system can also
reduce the forces to which vehicle occupants
are subjected during an accident. 44
Occupant safetySafety

?
u Switches the rear interior lighting
on/off
A p Switches the right-hand front read-
ing lamp on/off
Control panel in the grab handle (rear
compartment) :
Reading lamp
; p Switches the reading lamp on/off Interior lighting control
General notes In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time,
unless the key is in position 2in the ignition
lock.
The colour, brightness and display lamp for
the ambient lighting may be set using
COMAND Online or Audio 20 (see the sepa-
rate operating instructions).
Automatic interior lighting control X
To switch on/off: press the|button.
When the automatic interior lighting con-
trol is activated, the button is flush with the overhead control panel.
The interior lighting automatically switches
on if you:
R unlock the vehicle
R open a door
R remove the key from the ignition lock The interior lighting is activated for a short
time when the key is removed from the igni-
tion lock. This delayed switch-off can be
adjusted using COMAND Online or Audio 20
(see the separate operating instructions).
Manual interior lighting control X
To switch the front interior lighting on/
off: press the cbutton.
X To switch the rear interior lighting on/
off: press the ubutton.
X To switch the reading lamps on/off:
press the pbutton. Crash-responsive emergency lighting
The interior lighting is activated automatically
if the vehicle is involved in an accident.
X To switch off the crash-responsive
emergency lighting: press the hazard
warning lamp button.
or X Lock and then unlock the vehicle using the
key. Replacing bulbs
Important safety notes
G
WARNING
Bulbs, lamps and plug connectors can
become very hot during use. When replacing a bulb, you could burn yourself on these com-
ponents. There is a risk of injury.
Allow these components to cool down beforereplacing the bulb.
Do not use a bulb that has been dropped or if
its glass tube has been scratched.
The bulb may explode if:
R you touch it
R it is hot Replacing bulbs
141Lights and windscreen wipers Z

Problems with "Pre-entry climate control via key"
Problem
Possible causes/consequences and
M
MSolutions "Pre-entry climate con-
trol via key" cannot be
activated or has been
deactivated. The charge status of the high-voltage battery is under the specified
minimum charge status.
X Start the engine when the vehicle is at a standstill.
The internal combustion engine drives the electric motor. The
electric motor is operating as an alternator. The high-voltage
battery is charging.
Further information on charging the high-voltage battery
(Y page 420). The pre-entry climate control was started more than once when
the engine was switched off.
X Switch on the engine and let it run for more than ten seconds.
X Try again to activate "Pre-entry climate control via key". The difference between the interior temperature and the desired
temperature is too small.
X Increase the difference between the interior temperature and
the desired temperature. Remote activation of heating and ven-
tilation system
General notes Remote activation is only available on vehi-
cles with the BlueEFFICIENCY package.
The driver's and front-passenger seat areas
can also be heated or ventilated when the
engine is switched off.
The starter battery must be sufficiently
charged before remote activation can be acti-
vated.
When the vehicle is heated, the following
functions are activated:
R seat heating
R rear window heating
R exterior mirror heating
When the vehicle is ventilated, the following
functions are activated:
R blower
R seat ventilation If you have switched on the perfume atomiser
or ionisation using Audio 20/COMAND
Online, these will be activated together with
remote activation.
Activating the perfume atomiser/ionisation
(see separate COMAND Online operating
instructions).
Activating/deactivating the remote
activation function X
To switch on remote activation: push the
climate control symbol button on the key.
The air-conditioning functions are switched on, for up to 10 minutes for heating and up
to 120 minutes for ventilation.
At outside temperatures below 20 †, the
heating functions are activated.
At outside temperatures above 20 †, the
ventilation functions are activated. 174
Operating the climate control systemClimate control

Emergency braking
The vehicle can also be braked during an
emergency by using the electric parking
brake.
X While driving, press handle :of the elec-
tric parking brake (Y page 213).
The vehicle is braked as long as you keep
handle :of the electric parking brake
depressed. The longer the electric parking
brake handle :is depressed, the greater the
braking force.
During braking:
R a warning tone sounds
R the Release parking brake
Release parking brake message
appears
R the red !indicator lamp in the instru-
ment cluster flashes
When the vehicle has been braked to a stand- still, the electric parking brake is applied. Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged by exhaustive discharging and further dam-
aged in the event of this occurring again.
X Disconnect the battery or connect it to a
trickle charger.
i You can obtain information about trickle
chargers from a qualified specialist work-
shop.
If you leave the vehicle parked up for longer
than six weeks, it may suffer from lack of use.
X Visit a qualified specialist workshop and
seek advice.
Hybrid vehicles: observe the important
safety notes on the high-voltage battery
(Y page 273). Driving tips
General driving tips
Important safety notes G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk of an accident.
Do not switch off the ignition while driving.
Drive sensibly – save fuel Observe the following tips to save fuel:
X The tyres should always be inflated to the
recommended tyre pressure.
X Remove unnecessary loads.
X Remove roof racks when they are not nee-
ded.
X Warm up the engine at low engine speeds.
X Avoid frequent acceleration or braking.
X Have all maintenance work carried out as
indicated by the service intervals in the
Service Booklet or by the service interval
display.
Fuel consumption also increases when driv-
ing in cold weather, in stop-start traffic, on
short journeys and in hilly terrain. ECO display
The ECO display shows you how economical
your driving style is. The ECO display assists
you in achieving the most economical driving
style for the selected settings and prevailing
conditions. Consumption can be significantly influenced by your driving style. Driving tips
215Driving and parking Z

?
High-voltage battery
A Energy flow
The active hybrid components are highligh-
ted.
The energy flow is indicated by arrows. The
arrows have a different colour depending on
the operating state:
R Green: energy recuperation
R White: normal energy consumption
R Red: increased energy consumption, provi-
ded by the vehicle's high-voltage electrical
system
Automatic engine switch-off The internal combustion engine and the elec-
tric motor are switched off.
The arrows for the energy flow are not shown.
The combustion engine is shown in dark grey.
The charge status of the high-voltage battery is shown when the key is in position 2in the
ignition lock.
Engine running while the vehicle is sta-
tionary The combustion engine is running while the
vehicle is stationary. The high-voltage battery
is not being charged.
The arrows for the energy flow are not shown. The combustion engine is highlighted.
Charging while the vehicle is stationary The internal combustion engine drives the
electric motor. The electric motor is operating
as an alternator. The high-voltage battery is
charging.
The arrow representing energy flow is shown in white.
Driving using the internal combustion
engine The internal combustion engine powers the
vehicle.
The arrows for the energy flow are shown in
white. Hybrid operation
277Driving and parking Z