
Climate control125areas with high dust levels or which
are sensitive to environmental
allergens.
Passenger compartment air filter
replacement may also be needed if
there is reduced air flow, windows
fogging up, or odors.
Your dealer can help to determine
when it is the right time to replace the
filter.
Air conditioning regular operation
In order to ensure continuously
efficient performance, cooling must
be operated for a few minutes once a
month, irrespective of the weather
and time of year. Operation with
cooling is not possible when the
outside temperature is too low.
Service For optimal cooling performance, it is recommended to annually check the
climate control system, starting
three years after initial vehicle
registration, including:● functionality and pressure test
● heating functionality
● leakage check
● check of drive belts
● cleaning of condenser and evaporator drainage
● performance check
● cabin air filter check

128Driving and operating0:ignition off: Some functions
remain active until key is
removed or driver's door is
opened, provided the ignition was
on previously1:ignition on power mode: Ignition
is on, diesel engine is preheating. Control indicators illuminate and
most electrical functions are
operable2:engine start: Release key after
after engine has been started
Steering wheel lock
Remove key from ignition switch and
turn steering wheel until it engages.
9 Danger
Never remove the key from
ignition switch during driving as
this will cause steering wheel lock.
Power button
Electronic key must be inside the
vehicle.
Engine start
Operate clutch pedal (manual
transmission) or brake pedal
(automatic transmission) and press
Start/Stop . Release button after
starting procedure begins. Diesel
engine starts after preheating.Ignition on power mode without
starting the engine
Press Start/Stop without operating
clutch or brake pedal. Control
indicators illuminate and most
electrical functions are operable.Engine and ignition off
Press Start/Stop briefly in each mode
or when engine is running and vehicle
is stationary. Some functions remain
active until driver's door is opened,
provided the ignition was on
previously.Emergency shut off during driving
Press Start/Stop for five seconds
3 130. Steering wheel locks as soon
as vehicle is stationary.
Steering wheel lock
The steering wheel lock activates
automatically when:
● The vehicle is stationary.
● The ignition has been switched off.
To release steering wheel lock, open
and close driver's door and switch on accessory mode or start the engine
directly.

132Driving and operatingActivation
The stop-start system is available as
soon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are
fulfilled.
Deactivation
Deactivate the stop-start system
manually by pressing Ò. The
deactivation is indicated when the
LED in the button illuminates.
AutostopVehicles with manual transmission
An Autostop can be activated at a
standstill or at a low speed up to
9 mph.
Activate an Autostop as follows: ● Depress the clutch pedal.
● Set the lever to neutral.
● Release the clutch pedal.
The engine will be switched off while the ignition stays on.Vehicles with automatic transmissionIf the vehicle is at a standstill with
depressed brake pedal, Autostop is
activated automatically.
The engine will be switched off while the ignition stays on.
The stop-start system will be disabled
on inclines of 15% or more.Indication
An Autostop is indicated by control
indicator D.
During an Autostop, the heating and
brake performance will be
maintained.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled.
● The stop-start system is not manually deactivated.
● The bonnet is fully closed.
● The driver's door is closed or the driver's seat belt is fastened.
● The vehicle battery is sufficiently charged and in good condition.
● The engine is warmed up.
● The engine coolant temperature is not too high.

Driving and operating133● The engine exhaust temperatureis not too high, e.g. after driving
with high engine load.
● The ambient temperature is above -5 °C.
● The climate control system allows an Autostop.
● The brake vacuum is sufficient.
● The self-cleaning function of the diesel particle filter is not active.
● The vehicle was driven at least at
walking speed since the last Autostop.
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 115.
If an autostop is temporarily not
available, D flashes green 3 90.
New vehicle running-in 3 127.Vehicle battery discharge protection
To ensure reliable engine restarts,
several vehicle battery discharge
protection features are implemented
as part of the stop-start system.
Power saving measures
During an Autostop, several electrical
features such as auxiliary electric
heater or rear window heating are
disabled or switched to a power
saving mode. The fan speed of the
climate control system is reduced to save power.
Restart of the engine by the driver
Vehicles with manual transmissionConventional restart
All engines have conventional restart.
Depress the clutch pedal without
depressing the brake pedal to restart
the engine.
On engines with late restart a
conventional restart is only possible
without depressed brake pedal.Late restart
All engines have late restart in
addition to conventional restart. Late
restart is only active on gradients up to 5%.
● Depress the brake pedal.
● Depress the clutch pedal.
● Select first gear.
● Release the brake pedal to restart the engine.
Vehicles with automatic transmission
Release the brake pedal or move
selector lever out of D into N or P to
restart the engine.
Restart of the engine by the stop- start system
The selector lever must be in neutral
to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
● The stop-start system is manually deactivated.
● The bonnet is opened.

Driving and operating167Some fuels, mainly high octane
racing fuels, can contain an octane
enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use fuels or
fuel additives with MMT as they can
reduce spark plug life and affect
emission control system
performance. The malfunction
indicator light Z may turn on 3 87. If
this occurs, seek the assistance of a
workshop.
Fuel for diesel engines
Only use diesel fuel that complies
with EN 590.
In countries outside the European
Union use Euro-Diesel fuel with a
sulfur concentration below 50 ppm.Caution
Use of fuel that does not comply to EN 590 or similar can lead to
engine powerloss, increased wear
or engine damage.
Do not use marine diesel oils, heating
oils, Aquazole and similar diesel-
water emulsions. Diesel fuels must
not be diluted with fuels for petrol
engines.
Refuelling9 Danger
Before refuelling, switch off
ignition and any external heaters
with combustion chambers.
Follow the operating and safety
instructions of the filling station
when refuelling.
9 Danger
Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by a
workshop.
Caution
In case of misfuelling, do not
switch on ignition.
Fuel filler flap is located at left rear
side of vehicle.

210Vehicle careIf using a vehicle wash, comply with
the vehicle wash manufacturer's
instructions. The windscreen wiper and rear window wiper must be
switched off. Remove antenna and
external accessories such as roof
racks etc.
If you wash your vehicle by hand,
make sure that the insides of the
wheel housings are also thoroughly
rinsed out.
Wax painted parts of the vehicle
regularly.
Clean edges and folds on opened
doors and the bonnet as well as the
areas they cover.
Clean bright metal mouldings with a
cleaning solution approved for
aluminium to avoid damages.Caution
Always use a cleaning agent with
a pH value of four to nine.
Do not use cleaning agents on hot surfaces.
Do not clean the engine compartmentwith a steam-jet or high-pressure jet
cleaner.
Thoroughly rinse and leather-off the vehicle. Rinse leather frequently. Use
separate leathers for painted and
glass surfaces: remnants of wax on
the windows will impair vision.
Have the door hinges of all doors
greased by a workshop.
Exterior lights
Headlight and other light covers are
made of plastic. Do not use any
abrasive or caustic agents, do not use an ice scraper, and do not clean them
dry.
Polishing and waxing
Wax the vehicle regularly (at the
latest when water no longer beads).
Otherwise, the paintwork will dry out.
Polishing is necessary only if the paint
has become dull or if solid deposits
have become attached to it.
Paintwork polish with silicone forms a
protective film, making waxing
unnecessary.Plastic body parts must not be treated with wax or polishing agents.
Windows and windscreen wiper
blades
Use a soft lint-free cloth or chamois
leather together with window cleaner
and insect remover.
When cleaning the rear window from
inside, always wipe in parallel to the
heating element to prevent damage.
For mechanical removal of ice, use a
sharp-edged ice scraper. Press the
scraper firmly against the glass so
that no dirt can get under it and
scratch the glass.
Clean smearing wiper blades with a
soft cloth and window cleaner.
Remove dirt residues from smearing
wiper blades by using a soft cloth and window cleaner. Also make sure to
remove any residues such as wax,
insect residues and similar from the
window.
Ice residues, pollution and continuous
wiping on dry windows will damage or
even destroy the wiper blades.

240Head restraints ............................ 42
Head-up display............................ 96
Heated mirrors ............................. 35
Heated rear window ..................... 38
Heated steering wheel .................73
Heated windscreen .......................39
Heating ........................................ 46
Heating and ventilation system . 114
High beam ........................... 91, 107
High beam assist ..........................91
Hill start assist ........................... 144
Horn ....................................... 13, 74
I Identification plate .....................217
Ignition switch positions .............127
Immobiliser .................................. 34
Indicators ...................................... 82
Inductive charging ........................78
Info display ................................... 94
Instrument cluster ........................79
Instrument panel fuse box .........192
Instrument panel illumination .....189
Instrument panel illumination control .................................... 111
Instrument panel overview ........... 10
Interior care ............................... 211
Interior lighting ............................ 111
Interior lights ...................... 112, 189
Interior mirrors .............................. 36Interruption of power supply ......141
Introduction .................................... 3
J
Jump starting ............................. 206
K Keys ............................................. 21
Keys, locks ................................... 21
L Lane departure warning .......88, 164
Lashing eyes ............................... 68
LED headlights ........................... 184
Lighting features .........................113
Light switch ................................ 106
Load compartment ................30, 64
Load compartment cover .............67
Loading information .....................70
Low beam ..................................... 91
Low fuel ....................................... 90
M Malfunction indicator light ............87
Manual anti-dazzle ......................36
Manual mode ............................. 140
Manual transmission .................. 142
Mirror adjustment ........................... 9
Misted light covers .....................111N
New vehicle running-in ..............127
Number plate light .....................189
O Object detection systems ...........150
Odometer ..................................... 83
Oil, engine .......................... 215, 219
OnStar ........................................ 102
Outside temperature ....................76
Overrun cut-off ........................... 131
P Panoramic view system ..............160
Parking ................................ 19, 134
Parking assist ............................ 150
Parking brake ............................ 144
Parking lights ............................. 111
Particulate filter ........................... 135
Performance .............................. 224
Performing work ........................176
Power button .............................. 128
Power outlets ............................... 77
Power saving mode ....................129
Power windows ............................ 37
Preheating ................................... 89
Puncture ..................................... 202
Q Quickheat ................................... 122

241RRadio Frequency Identification (RFID) ..................................... 236
Radio remote control ...................22
Rain sensor .................................. 91
Reading lights ............................ 112
Rear floor storage cover ..............67
Rear fog light ....................... 91, 110
Rear seats .................................... 47
Rear view camera ...................... 162
Rear window wiper/washer .......... 76 Recommended fluids and lubricants ........................ 215, 219
Refuelling ................................... 167 Registered trademarks ...............234
Reversing lights .........................111
Ride control systems ..................145
Roof .............................................. 40
Roof load ...................................... 70
Roof rack ..................................... 70
S Safety belts ................................... 48
Seat adjustment ....................... 7, 44
Seat belt ........................................ 8
Seat belt reminder .......................86
Seat belts ..................................... 48
Seat heating ................................. 46
Seat position ................................ 43
Selective catalytic reduction .......136Selector lever ............................. 139
Service ............................... 125, 213
Service display ............................ 84
Service information ....................213
Service vehicle soon .................... 87
Side airbag system ......................54
Side blind spot alert ....................158
Sidelights .................................... 106
Side turn signal lights ................188
Software acknowledgement .......232
Software update ......................... 234
Spare wheel ............................... 204
Speed limiter......................... 91, 148
Speedometer ............................... 82
Starting and operating ................127
Starting off ................................... 17
Starting the engine ....................130
Steering ...................................... 127
Steering wheel adjustment ......9, 73
Steering wheel controls ...............73
Stop engine .................................. 87
Stop-start system........................ 131
Storage ......................................... 63
Storage compartments .................63
Sunvisor lights ........................... 112
Sun visors .................................... 40
Symbols ......................................... 4
System check ............................... 88T
Tachometer ................................. 83
Tail lights ................................... 185
Three-point seat belt .................... 49
Tools .......................................... 194
Tow bar....................................... 169
Towing ................................ 169, 207
Towing another vehicle .............208
Towing equipment .....................170
Towing the vehicle .....................207
Traffic sign assistant .....................91
Trailer coupling ........................... 169
Trailer towing ............................. 170
Transmission ............................... 16
Transmission display .................139
Tread depth ............................... 197
Trip odometer .............................. 83
Turn and lane-change signals ...110
Turn signal ................................... 85
Tyre chains ................................ 199
Tyre deflation detection system . 196
Tyre designations ......................195
Tyre pressure ............................ 195
Tyre pressures ........................... 228
Tyre repair kit ............................. 199
U Ultrasonic parking assist............. 150
Upholstery .................................. 211
Using this manual ..........................3