134Climate controlAir conditioning regularoperation
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 operating141ActivationThe stop-start system is available assoon 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.
Activate an Autostop as follows: ● Depress the clutch pedal.
● Set the selector 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 12% 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 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 not too low or too high.
● The climate control system allows an Autostop.
● The brake vacuum is sufficient.
142Driving and operating● The self-cleaning function of theexhaust filter is not active.
● The vehicle was driven at least at
walking speed since the last
Autostop.
Otherwise an Autostop will be
inhibited.
Note
The Autostop may be inhibited for
several hours after a battery
replacement or reconnection.
Certain settings of the climate control
system may inhibit an Autostop.
Climate control 3 125.
Immediately after higher speed
driving an Autostop may be inhibited.
New vehicle running-in 3 136.
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 aredisabled 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 transmission
Depress the clutch pedal without
depressing the brake pedal to restart
the engine.
Vehicles with automatic transmission The engine is restarted if
● the brake pedal is released while
the selector lever is in position D
or M
● or the brake pedal is released or the selector lever is in position N
when the selector lever is moved
to position D or M
● or the selector lever is moved to position R.
Restart of the engine by the stop-
start system
The selector lever must be in neutralto 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 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 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.
Vehicle care217Engine compartment fusebox
The fuse box is in the front left of the
engine compartment.
Disengage the cover and remove it. Depending on the version, different
engine compartment fuse boxes are
available:
No.Circuit9Anti-theft alarm system10Stop-start system11Diesel exhaust system13Stop-start system15Electric power steering / Radar22Horn29StarterNo.Circuit1Climate control2Steering wheel4Electric parking brake6Air vent16Front fog lights18Right high beam (Halogen) /
Right headlight (LED)19Left high beam (Halogen) /
Right headlight (LED)21Starter
Vehicle care219No.Circuit13Anti-theft alarm system16Electrical power steering wheel18OnStar21Interior lights22Glovebox light23Blind spot alert system / Exterior
mirror adjustment / Inductive
charging24Column electrical assembly25Interior mirror26Seat belt reminder27Camera / Rain sensor / Auto‐
matic light control28USB / Infotainment31Airbag33Power outlet front36InfotainmentNo.Circuit1Interior mirror / Electrical power
steering wheel / Selective ride
control / Radar / Diesel exhaust
system3Trailer provisions control
module4Horn5Windscreen washer6Windscreen washer7Power outlet rear10Doors lock / Tailgate lockNo.Circuit11Doors lock / Tailgate lock12Stop-start system / Diagnostic
connector module / Brake
system13Infotainment / Climate control
system14Alarm siren15Climate control system16Stop-start system / Brake
system17Instrument cluster19Column electrical assembly /
Steering wheel controls21Anti-theft alarm system22Camera / Rain sensor / Auto‐
matic light control23Seat belt reminder24Automatic transmission /
Advanced parking assist /
Panoramic view system
266IndexAAccessories and vehicle modifications .......................... 202
Active emergency braking ..100, 171
Adaptive cruise control .......100, 163
AdBlue .................................. 98, 145
Adjustable air vents ...................132
Advanced parking assist ............179
Airbag and belt tensioners ...........94
Airbag deactivation ................60, 95
Airbag label................................... 55 Airbag system .............................. 55
Air conditioning regular operation ................................ 134
Air conditioning system .............. 125
Air intake .................................... 133
Air vents...................................... 132
Antilock brake system ................ 152
Antilock brake system (ABS) .......97
Anti-theft alarm system ................35
Anti-theft locking system .............. 35
Appearance care ........................236
Armrest ................................... 51, 52
Ashtrays ....................................... 88 Automatic anti-dazzle ..................39
Automatic light control ...............115
Automatic locking ........................28
Automatic transmission .............148
Autostop ............................... 99, 140
Auxiliary heater ........................... 132B
Battery discharge protection ......123
Battery voltage ........................... 105
BlueInjection ............................... 145
Bonnet ....................................... 204
Brake and clutch fluid .................242
Brake and clutch system .............96
Brake assist ............................... 154
Brake fluid .................................. 207
Brakes ............................... 152, 207
Breakdown.................................. 234
Bulb replacement ....................... 210
C Capacities .................................. 253
Catalytic converter .....................144
Central locking system ................24
Centre console lighting ..............122
Centre console storage ...............70
Changing tyre and wheel size ...224
Charging system .......................... 95
Child locks ................................... 29
Child restraint installation locations ................................... 65
Child restraints.............................. 62
Child restraint systems ................62
Cigarette lighter ........................... 87
Climate control ............................. 16
Climate control systems .............124
Clock............................................. 84
267Collision damage repair..............259
Control indicators.......................... 93
Control of the vehicle .................136
Controls ........................................ 80
Convex shape .............................. 38
Coolant and antifreeze ...............242
Cruise control ....................100, 158
Cupholders .................................. 69
Curtain airbag system .................. 60
Curve lighting.............................. 116
D Danger, Warnings and Cautions ...4
Daytime running lights ...............116
Declaration of conformity ............256
DEF ............................................ 145
Deflation detection system ...........98
Diesel exhaust fluid ....................145
Diesel fuel system bleeding .......209
Door open .................................. 101
Doors ............................................ 30
Driver alert .................................. 192
Driver assistance systems ..........158
Driver Information Centre ...........101
Driving characteristics and towing tips .............................. 197
Driving hints ................................ 136
E Electric adjustment ......................38
Electrical system......................... 216Electric parking brake ...........96, 152
Electric parking brake fault ...........96
Electronic climate control system 128
Electronic driving programmes ..150
Electronic key system ...................23
Electronic Stability Control and Traction Control system ....97, 155
End-of-life vehicle recovery .......204
Engine compartment fuse box ...217
Engine coolant ........................... 206
Engine coolant temperature ........97
Engine coolant temperature gauge ....................................... 92
Engine data ............................... 249
Engine exhaust .......................... 144
Engine identification ...................245
Engine oil ................... 205, 242, 246
Engine oil level monitor ................92
Engine oil pressure ......................98
Entry lighting .............................. 122
Event data recorders ..................262
Exhaust filter ......................... 98, 144
Exit lighting ................................ 123
Exterior care .............................. 236
Exterior light ................................. 99
Exterior lighting ....................13, 114
Exterior mirrors ............................. 38F
Fault ........................................... 150
First aid ......................................... 76
First aid kit ................................... 76
Fixed air vents ........................... 133
Folding mirrors ............................. 38
Forward collision alert................. 170
Front airbag system .....................59
Front fog lights ...........100, 120, 211
Front pedestrian protection ........174
Front seats.................................... 46
Fuel............................................. 194
Fuel for diesel engines ..............194
Fuel for petrol engines ...............194
Fuel gauge ................................... 92
Fuses ......................................... 216
G Gauges ......................................... 91
Gear shifting ................................. 97
General information ...................197
Glass panel .................................. 43
Glovebox ..................................... 69
Glovebox cooler ......................... 133
H
Halogen headlights ....................210
Hazard warning flashers ............119
Headlight flash ........................... 115
Headlight range adjustment ......116
Headlights................................... 114