Page 157 of 313
Climate control155Basic settingsSome settings can be changed in theSettings menu in the Info-Display.Vehicle personalisation 3 125.
Auxiliary heater Air heater Quickheat is an electric auxiliary airheater which automatically warms up
the passenger compartment more
quickly.Air vents
Adjustable air vents
At least one air vent must be open
while cooling is on.
To open the vent, turn the adjuster
wheel towards the bigger W symbol.
Adjust the air amount at the vent
outlet by turning the adjuster wheel.
Direct the flow of air by tilting and
swivelling the slats.
To close the vent, turn the adjuster
wheel towards the smaller W symbol.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Fixed air vents
Additional air vents are located
beneath the windscreen and door windows and in the foot wells.
Page 158 of 313
156Climate controlMaintenanceAir intake
The air intake in front of the
windscreen in the engine
compartment must be kept clear to
allow air intake. Remove any leaves,
dirt or snow.
Pollen filter The pollen filter cleans dust, soot,
pollen and spores from the air
entering the vehicle through the air
intake.
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
Page 166 of 313

164Driving and operatingVehicles with automatic transmission
or manual transmission automated
If the vehicle is at a standstill with
depressed brake pedal, Autostop is
activated automatically.
Indication
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer.
After restart, the idle speed is
indicated.
During an Autostop the performance
of the vehicle 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.
● The engine exhaust temperature is not too high, e.g. after driving
with high engine load.
● The ambient temperature is above -5 °C.
● The brake vacuum is sufficient.
● Between the last Restart and a new Autostop must be about
10 s.
● 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.
● The stop-start system will be deactivated on inclines of 15% or
more.
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 148.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 158.
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
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Driving and operating165saving mode. The fan speed of the
climate control system is reduced to
save power.
Restart of the engine by the driverVehicles with manual transmission
Depending on the engine, two
versions of a restart are available.
See engine data to identify the engine
identifier code for your vehicle
3 285.
Conventional restart
Depress the clutch pedal to restart the
engine. For engines with late restart,
this is only possible without
depressing the brake pedal.
Late restart
All petrol engines and the diesel
engines B16DTU and B16DTR have
late restart in addition to conventional
restart. Late restart is only active on
inclines 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
or manual transmission automated:
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
On vehicles with manual transmission
which are in a conventional Autostop,
the selector lever must be in neutral
to enable an automatic restart.
On vehicles with manual transmission
which are in an early Autostop, an
automatic restart is possible, when
not in neutral if the brake pedal and
the clutch pedal are depressed.
On vehicles with automatic
transmission or manual transmission
automated, the selector lever must be
in D to enable an automatic restart.
The engine will be restarted
automatically by the stop-start
system, if one of the following
conditions occurs during an Autostop:
● The stop-start system is manually deactivated.
● The bonnet is opened.● The driver's seat belt is unfastened and / or the driver'sdoor is opened.
● The engine temperature is too low.
● The charging level of the vehicle battery is below a defined level.
● The brake vacuum is not sufficient.
● The vehicle is driven at least at walking speed.
● The climate control system requests an engine start.
● The desired compartment temperature does not match the
actual temperature.
● The air conditioning is manually switched on.
If the bonnet is not fully closed, a
warning message is displayed in the
Driver Information Centre.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop
during the restart might be noticeable.
Page 249 of 313
Vehicle care247No.Circuit1Starter2Starter3Exhaust sensor4Engine control module5Engine functions6Transmission control module7–8Engine control module9Climate control system10Diesel exhaust system11Tailgate locking system, Trans‐
mission12Seat lumbar massage13After boil pump14Diesel exhaust system15Exhaust sensor16Fuel injection17Fuel injectionNo.Circuit18Diesel exhaust system19Diesel exhaust system20–21DC/AC Converter22ABS23Washer system for windscreen
and rear window24–25Diesel fuel heating26Transmission control module27Power tailgate module28–29Heated rear window30Mirror defrost31–32DC transformer/LED display/
Electrical heater/Climate
control/Glow plug controller
Page 251 of 313
Vehicle care249
Attach the adapter to the power
connector.
Push the screwdriver through the
recess in the adapter. Remove the
cover by pulling the screwdriver.No.Circuit1–2Climate control system, fan3Power seat driver side4Cigarette lighter/Power outlet
front5–6Power window front7ABS8Heated steering wheel9Body control module10Power window rear11Sunroof12Body control module13Seat heating (only on vehicles
without alarm horn)14Exterior mirror15Body control module16Body control module
Page 252 of 313
250Vehicle careNo.Circuit17Body control module18Body control module19Data link connector20Airbag system21Climate control system22Central locking system, tailgate23Electronic key system24Power seat memory function25Airbag system steering wheel26Ignition switch/Steering column
lock27Body control module28USB socket29–30Selector lever31Rear window wiper32Transmission control moduleNo.Circuit33Anti-theft alarm system/Power
sounder34Parking assist/Side blind spot
alert/Infotainment system/USB
socket35OnStar36Info display/Instrument cluster/ CD player37Infotainment system, radio
After having changed defective fuses,
close the fuse box cover and press
until it engages.
Vehicles with power connector: 1. Apply the cover on the right side.
2. Fold the left side of the cover forwards. Take care that the
securing clamp is guided as
shown in the illustration.
Load compartment fuse box
The fuse box is located on the left side
of the load compartment behind a
cover.
Page 308 of 313

306IndexAAccessories and vehicle modifications .......................... 227
Active emergency braking ..........197
Adaptive cruise control .......114, 186
Adjustable air vents ...................155
Airbag and belt tensioners .........110
Airbag deactivation ..............63, 110
Airbag label................................... 58 Airbag system .............................. 58
Air conditioning regular operation ................................ 156
Air conditioning system .............. 148
Air intake .................................... 156
Air vents...................................... 155
Antilock brake system ................ 176
Antilock brake system (ABS) .....112
Anti-theft alarm system ................36
Anti-theft locking system .............. 36
Appearance care ........................273
Armrest ................................... 53, 55
Armrest storage ........................... 72
Ashtrays ....................................... 99
Automatic anti-dazzle ..................41
Automatic light control ...............137
Automatic locking ........................29
Automatic transmission .............169
Autostop ..................................... 163
Auxiliary heater ........................... 155B
Battery discharge protection ......146
Battery voltage ........................... 124 Belts.............................................. 56
Bonnet ....................................... 229
Brake and clutch fluid .................277
Brake and clutch system ...........111
Brake assist ............................... 179
Brake fluid .................................. 232
Brakes ............................... 176, 232
Breakdown.................................. 271
Bulb replacement ....................... 235
C Capacities .................................. 292
Cargo management system ........82
Catalytic converter .....................169
Central locking system ................24
Centre console lighting ..............145
Changing tyre and wheel size ...260
Charging system ........................ 111
Child locks ................................... 30
Child restraint installation locations ................................... 67
Child restraints.............................. 65
Child restraint systems ................65
Climate control ............................. 16
Climate control systems .............147
Clock............................................. 95
CNG.................................... 106, 219