2012 MERCEDES-BENZ E-Class CABRIOLET cooling

1, 2, 3 ...
12 V socket see Sockets
A
ABS (Anti-lock Braking System) Display message ............................ 214
Function/notes ................................ 61
Important safety notes ....................61
Warning lamp ................................. 242
Activating/deactivating cooling
with air dehumidification ................. 134
Active Blind Spot Assist Activating/deactivating (on-
board computer) ............................ 207
Function/information ....................189
Active Driving Assistance package . 189
Active Lane Keeping Assist Activating/deactivating (on-
board computer) ............................ 207
Display message ............................ 229
Function/information ....................192
Active Light System
Display message ............................ 224
Active service system PLUS
see ASSYST PLUS service interval
display
ADAPTIVE BRAKE ................................. 65
Adaptive Highbeam Assist Display message ............................ 225
Function/notes ............................. 120
Switching on/off (on-board
computer) ...................................... 209
Additives (engine oil) ........................ 344
Air bags Display message ............................ 221
Front air bag (driver, front
passenger) ....................................... 39
Important safety notes ....................38
Knee bag .......................................... 40
PASSENGER AIRBAG OFF
indicator lamp .................................. 43
Pelvis air bag ................................... 42
Safety guidelines ............................. 37
Side impact air bag ..........................41
Window curtain air bag ....................43
AIRCAP
Cleaning instructions .....................283
Extending/retracting .......................94
General notes .................................. 94
Installing/removing the wind
screen .............................................. 95
Air-conditioning system
see Climate control
Air pressure
see Tire pressure
AIRSCARF
Setting the vents ........................... 141
Switching on/off ........................... 108
Air vents
Glove box ....................................... 141
Important safety notes ..................140
Rear ............................................... 141
Setting ........................................... 140
Setting the AIRSCARF vents ..........141
Setting the center air vents ...........140
Setting the side air vents ...............140
Switching AIRSCARF on/off ..........108
Alarm system
see ATA (Anti-Theft Alarm system)
Alertness Assistant
see ATTENTION ASSIST
Anti-lock Braking System
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Anti-theft system
ATA (Anti-Theft Alarm system) .........67
Ashtray ............................................... 259
Assistance menu (on-board
computer) .......................................... 206
ASSYST PLUS see ASSYST PLUS service interval
display
ATA (Anti-Theft Alarm system)
Activating/deactivating ...................67
Function ........................................... 67
Switching off the alarm ....................67
ATTENTION ASSIST
Activating/deactivating .................207
Display message ............................ 228
Function/notes ............................. 185
Audio menu (on-board computer) .... 2034Index

Display ........................................... 285
Exterior lights ................................ 284
Gear or selector lever ....................286
Matte finish ................................... 282
Notes ............................................. 279
Paint .............................................. 281
Plastic trim .................................... 285
Power washer ................................ 281
Rear view camera .......................... 285
Roof lining ...................................... 287
Seat belt ........................................ 286
Seat cover ..................................... 286
Sensors ......................................... 284
Soft top .......................................... 282
Steering wheel ............................... 286
Tail pipes ....................................... 285
Trim pieces .................................... 286
Washing by hand ........................... 280
Wheels ........................................... 281
Wind deflector ............................... 283
Windows ........................................ 284
Wind screen ................................... 283
Wiper blades .................................. 284
Wooden trim .................................. 286
Cargo tie down rings ......................... 255
Car wash (care) ................................. 280
CD player/CD changer (on-board
computer) .......................................... 204
Cell phone see Mobile phone
Center console ..................................... 30
Central locking Automatic locking (on-board
computer) ...................................... 210
Locking/unlocking (SmartKey) ........70
Changing bulbs
High-beam headlamps ...................124
Important safety notes ..................122
Low-beam headlamps ....................124
Overview of bulb types ..................123
Parking lamps ................................ 125
Standing lamps (front) ...................125
Turn signals (front) ......................... 125
Child-proof locks
Important safety notes ....................59
Children
In the vehicle ................................... 55
Restraint systems ............................ 55Child seat
LATCH-type (ISOFIX) child seat
anchors ............................................ 57
Special seat belt retractor ...............57
Top Tether ....................................... 58
Cigarette lighter ................................ 260
Climate control Automatic climate control (3-
zone) .............................................. 133
Controlling automatically ...............135
Cooling with air dehumidification ..134
Defrosting the windows .................138
Defrosting the windshield ..............137
Dual-zone automatic climate
control ........................................... 131
Important safety notes ..................130
Indicator lamp ................................ 135
Maximum cooling .......................... 138
Notes on using automatic climate
control ................................... 132, 134
Overview of systems ......................130
Problems with cooling with air
dehumidification ............................ 135
Problem with the rear window
defroster ........................................ 139
Rear control panel .........................133
Refrigerant ..................................... 344
Setting the air distribution .............136
Setting the airflow .........................137
Setting the air vents ......................140
Setting the climate mode ............... 135
Setting the temperature ................136
Switching air-recirculation mode
on/off ............................................ 139
Switching on/off ........................... 134
Switching residual heat on/off ......139
Switching the rear window
heating on/off ............................... 138
Switching the ZONE function on/
off .................................................. 137
Cockpit
Overview .......................................... 26
see Instrument cluster
COMAND
see separate operating instructions
Combination switch .......................... 1196Index

CompassCalibrating ..................................... 271
Calling up ....................................... 271
Setting ........................................... 271
Consumption statistics (on-board
computer) .......................................... 201
Convenience closing feature .............. 85
Convenience opening feature ............ 84
Coolant (engine) Checking the level .........................276
Display message ............................ 225
Notes ............................................. 345
Temperature gauge ........................ 196
Warning lamp ................................. 246
Cooling
see Climate control
Cornering light function
Display message ............................ 222
Function/notes ............................. 120
Crash-responsive emergency
lighting ............................................... 122
Cruise control Cruise control lever .......................164
Deactivating ................................... 165
Display message ............................ 233
Driving system ............................... 164
Function/notes ............................. 164
Important safety notes ..................164
LIM indicator lamp .........................164
Setting a speed .............................. 165
Storing and maintaining current
speed ............................................. 164
Cup holder
Center console .............................. 257
Important safety notes ..................257
Rear compartment .........................258
Customer Assistance Center (CAC) ... 23
Customer Relations Department ....... 23
D
Dashboard see Cockpit
Data
see Technical data
Daytime running lamp mode
see Daytime running lamps
Daytime running lamps
Display message ............................ 224
Switching on/off (on-board
computer) ...................................... 209
Switching on/off (switch) ..............117
Delayed switch-off
Exterior lighting (on-board
computer) ...................................... 209
Interior lighting .............................. 210
Digital speedometer ......................... 201
Display (cleaning instructions) ........ 285
Display messages Calling up (on-board computer) .....213
Driving systems ............................. 228
Engine ............................................ 225
General notes ................................ 213
Hiding (on-board computer) ...........213
KEYLESS-GO .................................. 239
Lights ............................................. 222
Safety systems .............................. 214
Service interval display ..................278
SmartKey ....................................... 238
Tires ............................................... 233
Vehicle ........................................... 236
Distance display (on-board
computer) .......................................... 206
Distance recorder ............................. 201
see Odometer
see Trip odometer
Distance warning (warning lamp) .... 248
DISTRONIC PLUS Deactivating ................................... 173
Display message ............................ 231
Displays in the multifunction
display ........................................... 172
Driving tips .................................... 174
Function/notes ............................. 166
Important safety notes ..................166
Setting the specified minimum
distance ......................................... 171
Warning lamp ................................. 248
Doors
Automatic locking (on-board
computer) ...................................... 210
Automatic locking (switch) ............... 78
Central locking/unlocking
(SmartKey) ....................................... 70
Control panel ................................... 33Index7

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 23).
Overview of climate control systems
Important safety notes
GWARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a blocked filter replaced at a Mercedes-
Benz Center as soon as possible.
GWARNING
Follow the recommended settings for heating
and cooling given on the following pages.
Otherwise, the windows could fog up,
impairing visibility and endangering you and
others.
The automatic climate control adjusts the
temperature and the humidity of the vehicle
interior and filters undesired substances from
the air.
The automatic climate control is only
operational when the engine is running. 10
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 84).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. A clogged filter reduces the amount
of air supplied to the vehicle interior. For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.
i It is possible that the residual heat
function may be activated automatically an
hour after the SmartKey is removed. The
vehicle is then ventilated for 30 minutes to
dry the air-conditioning system.10 Automatic climate control: the residual heat function can only be activated/deactivated when the ignition
is switched off.130Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control
Canada only
:To activate/deactivate air-recirculation mode (Y page 139);To defrost the windshield ( Y page 137)=To switch the ZONE function on/off ( Y page 137)?DisplayATo set climate control to automatic ( Y page 135)BTo activate/deactivate cooling with air dehumidification ( Y page 134)CTo switch the rear window defroster on/off ( Y page 138)DTo switch climate control on/off ( Y page 134)ETo set the temperature, right ( Y page 136)FTo set the air distribution ( Y page 136)GTo set the airflow ( Y page 137)HTo set the temperature, left ( Y page 136)
USA only
:To set climate control to automatic ( Y page 135);To defrost the windshield ( Y page 137)=To switch the ZONE function on/off ( Y page 137)?To activate/deactivate air-recirculation mode ( Y page 139)ATo switch maximum cooling MAX COOL on/off ( Y page 138)BTo activate/deactivate cooling with air dehumidification ( Y page 134)Overview of climate control systems131Climate controlZ

Control panel for 3-zone automatic climate control
Canada only
Front control panel:To set climate control to automatic (Y page 135);To defrost the windshield ( Y page 137)=To switch the ZONE function on/off ( Y page 137)?DisplayATo activate/deactivate air-recirculation mode ( Y page 139)BTo activate/deactivate the residual heat function ( Y page 139)CTo activate/deactivate cooling with air dehumidification ( Y page 134)DTo switch the rear window defroster on/off ( Y page 138)ETo switch climate control on/off ( Y page 134)FTo set the temperature, right ( Y page 136)GTo set climate control to automatic (FOCUS/MEDIUM/DIFFUSE) ( Y page 135)HTo set the airflow ( Y page 137)ITo set the air distribution ( Y page 136)JTo set the temperature, left ( Y page 136) Rear control panelKTo increase the temperature ( Y page 136)LDisplayMTo reduce the temperature ( Y page 136)Overview of climate control systems133Climate controlZ

Notes on using 3-zone automatic
climate control
The following contains instructions and
recommendations to enable you to get the
most out of your automatic climate control.
R Activate climate control using the à and
¿ buttons. The indicator lamps above
the à and ¿ buttons light up. You
can also set the airflow and air distribution
of the automatic climate control to one of
three levels (FOCUS/MEDIUM/DIFFUSE).
You can set the desired level using button
G . The MEDIUM level is recommended.
R Set the temperature to 72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odors
or when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side and the rear
compartment as well. The indicator lamp
above the á button goes out.
R Use the residual heat function if you want
to heat or ventilate the vehicle interior
when the ignition is switched off. The
"residual heat" function can only be
activated or deactivated with the ignition
switched off.
Operating the climate control system
Activating/deactivating climate
control
Important information
GWARNING
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility and
endangering you and others.
i Switch on climate control primarily using
the à button ( Y page 135).
Activating/deactivatingXTurn the SmartKey to position 2 in the
ignition lock.XTo switch on: press the à button.
The indicator lamp above the à button
lights up. Airflow and air distribution are set
to automatic mode.
or
XPress the ^ button.
The indicator lamp above the ^ button
goes out. The previously selected settings
come into effect again.XTo switch off: press the ^ button.
The indicator lamp above the ^ button
lights up.
Activating/deactivating cooling with
the air dehumidification function
Important information
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
GWARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction.
134Operating the climate control systemClimate control

iThe cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
Activating/deactivatingXTo activate: press the ¿ button.
The indicator lamp above the ¿ button
lights up.XTo switch off: press the ¿ button.
The indicator lamp above the ¿ button
goes out. The cooling with air
dehumidification function has a delayed
switch-off feature.
Problems with the cooling with air
dehumidification function
When you press the ¿ button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification
function.
XConsult a qualified specialist workshop.
Setting climate control to automatic
GWARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
XTurn the SmartKey to position 2 in the
ignition lock.XSet the desired temperature.XTo activate: press the à button.
The indicator lamp above the à button
lights up. Automatic air distribution and
airflow are activated.
i 3-zone automatic climate control: when
automatic mode is activated, you can
select a climate mode setting
( Y page 135).
XTo deactivate: press the air distribution
button.
Dual-zone automatic climate control: press
button F(Y page 131).
3-zone automatic climate control: press
button I(Y page 133).
The indicator lamp above the à button
goes out.
or
XPress the airflow button.
Dual-zone automatic climate control: press
button G(Y page 131).
3-zone automatic climate control: press
button H(Y page 133).
The indicator lamp above the à button
goes out.
Adjusting the climate mode settings
(AIR FLOW)
This function is only available with 3-zone
automatic climate control.
The climate mode settings are especially
effective at high temperatures.
You can select the following climate mode
settings in automatic mode:
FOCUShigh airflow that is set slightly
coolerMEDIUMmedium airflow, standard settingDIFFUSElow airflow that is set slightly
warmer and with less draftOperating the climate control system135Climate controlZ