136Climate controlAutomatic air recirculationAn air humidity sensor switches
automatically to external air if internal air humidity is too high.
Basic settings
Some settings can be changed in the Settings menu in the Info-Display.
Vehicle personalisation 3 106.
Auxiliary heater
Air heater Quickheat is an electric auxiliary air
heater 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.
Climate control137Maintenance
Air 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
Driving and operating145Vehicles with automatic transmissionor manual transmission automated
If 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 the
needle at the AUTOSTOP position in
the tachometer.
After restart, the idle speed is
indicated.
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.
● The engine exhaust temperature is 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 3 129.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 139.
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.
146Driving and operatingRestart 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
3 247.
A restart for all engines except
B16DTU is possible at a standstill or
at a low speed up to 4 mph and up to
9 mph for engine B16DTU.
Conventional restart
All engines have conventional restart. Depress the clutch pedal withoutpressing the brake pedal to restart the
engine, on engines with late restart
only possible without depressed
brake pedal.
Late restart
All petrol engines and diesel engines B16DTU and B16DTR have late
restart in addition to conventional
restart.
● 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 in every
selector lever position.
On vehicles with automatic
transmission or manual transmission
automated, the selector lever must be
in D 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.
● The driver's seat belt is unfastened and the driver's door
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 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.
212Vehicle careNo.Circuit1Starter2Starter3Exhaust sensor4Engine control module5Engine functions6Transmission control module7–8Engine control module9Climate control system10–11Tailgate locking system12Seat lumbar massage13After boil pump14–15Exhaust sensor16Fuel injection17Fuel injectionNo.Circuit18–19–20–21–22ABS23Washer system for windscreen
and rear window24–25Diesel fuel heating26Transmission control module27Power tailgate module28–29Heated rear window30–31–32DC transformer/LED display/
Electrical heater/Climate
control/Glow plug controller/
Fuel pumpNo.Circuit33–34Horn35Power outlet load compartment36Right high beam (Halogen)/
Right low beam (LED)37Left high beam (Halogen)38LED headlight/Automatic head‐
light range adjustment39Front fog light40OnStar41Water in fuel sensor/Water
pump42Manual headlight range adjust‐
ment43Fuel pump44Rear view camera/Inside rear
view mirror/Trailer module/
Power connector45LED headlight left/Automatic
headlight range adjustment left
214Vehicle carePush the screwdriver through therecess 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 mirror/Rain sensor/
Lane keep assist/High beam
assist15Body control moduleNo.Circuit16Body control module17Body control module18Body control module19Data link connector20Airbag system21Climate control system22Central locking system, tailgate23Electronic key system24Power seat memory function25Illumination switch steering
wheel26Ignition switch/Steering column
lock27Body control module28USB socket29–30Selector lever31Rear window wiper
260IndexAAccessories and vehicle modifications .......................... 194
Active emergency braking ..........169
Adjustable air vents ...................136
Airbag and belt tensioners ...........92
Airbag deactivation ................56, 92
Airbag label................................... 52 Airbag system .............................. 52
Air conditioning regular operation ................................ 137
Air conditioning system .............. 129
Air intake .................................... 137
Air vents...................................... 136
Antilock brake system ................ 156
Antilock brake system (ABS) .......94
Anti-theft alarm system ................30
Anti-theft locking system .............. 30
Appearance care ........................236
Armrest ................................... 47, 49
Armrest storage ........................... 66
Ashtrays ....................................... 83
Automatic anti-dazzle ..................35
Automatic light control ...............118
Automatic locking ........................27
Automatic transmission .............150
Auxiliary heater ........................... 136B
Battery discharge protection ......127
Battery voltage ........................... 106
Belts.............................................. 49
Bonnet ....................................... 196
Brake and clutch fluid .................240
Brake and clutch system .............93
Brake assist ............................... 159
Brake fluid .................................. 199
Brakes ............................... 156, 199
Breakdown.................................. 234
Bulb replacement ....................... 202
C Capacities .................................. 252
Catalytic converter .....................149
Central locking system ................23
Centre console lighting ..............126
Changing tyre and wheel size ...224
Charging system .......................... 92
Child locks ................................... 28
Child restraint installation locations ................................... 61
Child restraints.............................. 58
Child restraint systems ................58
Climate control ............................. 15
Climate control systems .............128
Clock............................................. 79
Collision damage repair ..............255
Control indicators.......................... 91
261Control of the vehicle .................139
Controls ........................................ 75
Convex shape .............................. 33
Coolant and antifreeze ...............240
Cruise control ...................... 96, 162
Cupholders .................................. 65
Curtain airbag system .................. 56
Curve lighting.............................. 119
D Danger, Warnings and Cautions ...4
Daytime running lights ...............119
Declaration of conformity ............255
Diesel fuel system bleeding .......201
Diesel particle filter ....................148
Door open .................................... 97
Doors ............................................ 29
Driver assistance systems ..........162
Driver Information Centre .............97
Driving characteristics and towing tips .............................. 190
Driving hints ................................ 139
E Electric adjustment ......................33
Electrical system......................... 210
Electric parking brake ...........93, 157
Electric parking brake fault ...........93
Electronic climate control system 131
Electronic driving programmes . ........................................ 152, 156Electronic key system...................21
Electronic Stability Control.......... 160
Electronic Stability Control and Traction Control system ............94
Electronic Stability Control off....... 94 End-of-life vehicle recovery .......195
Engine compartment fuse box ...211
Engine coolant ........................... 198
Engine coolant temperature gauge ....................................... 89
Engine data ............................... 247
Engine exhaust .......................... 148
Engine identification ...................243
Engine oil ................... 197, 240, 244
Engine oil pressure ......................95
Entry lighting .............................. 126
Event data recorders ..................257
Exit lighting ................................ 126
Exterior care .............................. 236
Exterior light ................................. 96
Exterior lighting ....................12, 117
Exterior mirrors ............................. 33
F
Fault ................................... 152, 156
First aid kit ................................... 71
Fixed air vents ........................... 136
Fog light ....................................... 96
Fog lights ................................... 204
Folding mirrors ............................. 34Following distance ........................94
Following distance indication ......168
Forward collision alert................. 166
Fragrance diffuser ........................82
Front airbag system .....................55
Front fog lights ........................... 123
Front seats.................................... 41
Front storage ................................ 66
Fuel............................................. 187
Fuel consumption - CO 2-
Emissions ............................... 189
Fuel for diesel engines ..............187
Fuel for petrol engines ...............187
Fuel gauge ................................... 89
Fuses ......................................... 210
G Gauges ......................................... 87
Gear shifting ................................. 94
General information ...................190
Glovebox ..................................... 65
H Halogen headlights ....................202
Hand brake ......................... 156, 157
Hazard warning flashers ............122
Headlight flash ........................... 118
Headlight range adjustment ......118
Headlights................................... 117 Headlights when driving abroad 119
Head restraint adjustment .............8