cooling MERCEDES-BENZ E-CLASS CABRIOLET 2012 Owners Manual

1, 2, 3 ...
12 Vsocket
see Socket A
ABS (Anti-lock Braking System) Display message ............................ 250
Function/notes ................................ 65
Important safety notes ....................65
Warning lamp ................................. 277
Activating/deactivating air-recir-
culation mode .................................... 147
Activating/deactivating cooling
with air dehumidification .................143
Active Blin dSpot Assist
Activating/deactivating (on-
board computer) ............................ 241
Display message ............................ 264
Function/notes ............................. 214
Towing atrailer .............................. 217
Active Driving Assistance package .214
Active Lane Keeping Assist Activating/deactivating (on-
board computer) ............................ 241
Display message ............................ 264
Function/notes ............................. 218
Towing atrailer .............................. 220
Active light function .........................128
Active Service System see ASSYST PLUS
ADAPTIVE BRAKE ................................. 69
Adaptive brake lamps .........................67
Adaptive Highbeam Assist Display message ............................ 259
Function/notes ............................. 129
Adaptive Main-beam Assist
Switching on/off (on-board com-
puter) ............................................. 244
Additional speedometer ...................242
Additives (engine oil) ........................376
Adjusting the headlamp range .........126
Airbag Headbag .......................................... 46Airbags
Front airbag (driver, front
passenger )....................................... 44
Important safety guidelines .............42
Kneebag .......................................... .45
Pelvis airbag .................................... 46
Sidebag ............................................ 45
Triggering ......................................... 41
Windowba g...................................... 47
AIRCAP
Cleaning instructions .....................315
Extending/retracting .....................100
Fitting/removing the wind deflec-
tor .................................................. 101
Important safety notes ..................100
Air-conditioning system
see Climate control
Airf ilter (white display message) ....262
Air pressure see Tyre pressure
AIRSCARF
Setting the vents ........................... 155
Switching on/off ........................... 115
Airv ents
Glove compartmen t....................... 154
Important safety notes ..................153
Rea r............................................... 154
Setting ........................................... 153
Setting the AIRSCARF vents ..........155
Setting the centre air vents ...........154
Setting the side air vents ...............154
Switching AIRSCARF on/off ..........115
Alarm system
see ATA (Anti-Theft Alarm system)
Anti-glare film .................................... 303
Anti-loc kBraking System
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Aquaplaning ....................................... 181
Ashtray ............................................... 294
Assistance menu (on-board com-
puter) ................................................. .239
ASSYST PLUS Displaying a service message ........311
Hiding a service message ..............311
Notes ............................................. 3114
Index

Changing bulbs
Dipped-beam headlamps ...............134
Important safety notes ..................132
Main-beam headlamps ................... 134
Overview of bul btypes .................. 133
Parking lamps (front) .....................134
Standing lamps .............................. 134
Turn signals (front) ......................... 135
Child-proof locks
Important safety notes ....................63
Children
child seat lock .................................. 55
In the vehicle ................................... 53
Restraint systems ............................ 53
Child seat
Automatic recognition .....................56
ISOFIX .............................................. 57
On the front-passenger sea t............ 55
Problem (malfunction) .....................60
Recommendations ...........................62
Suitable positions ............................ 60
Top Tether ....................................... 58
Child seat lock ..................................... 55
Cigarette lighter ................................ 294
Cleaning Mirro rturn signal ........................... 316
Trailer tow hitch ............................. 317
Climate control
Auxiliary heating/ventilation .......... 149
Controlling automatically ...............144
Convenience opening/closing
(air-recirculatio nmode) ................. 148
Cooling with aird ehumidification..143
Demisting the windows .................. 147
Demisting the windscreen .............146
Important safety notes ..................140
Indicator lamp ................................ 144
Information on using
THERMOTRONIC automatic cli-
mate control .................................. 143
Notes on using THERMATIC auto-
matic climate control .....................141
Overview of systems ......................140
Problems with cooling with air
dehumidification ............................ 144
Problem with the rear window
heating .......................................... 147
Rea rcontrol panel ......................... 142Setting the aird
istribution.............145
Setting the airflow .........................146
Setting the airv ents...................... 153
Setting the climate mode .............. .144
Setting the temperature ................144
Switching air-recirculation mode
on/off ............................................ 147
Switching on/off ........................... 143
Switching residual hea ton/off ......148
Switching the rear window heat-
ing on/off ...................................... 147
Switching the ZONE function on/
off .................................................. 146
THERMATIC automatic climate
control (2-zone) ............................. 141
THERMOTRONIC (3-zone) auto-
matic climate control .....................142
Cockpit
Overview .......................................... 28
see Instrument cluster
COMAND display
Cleaning ......................................... 318
COMAND Online
see separate operating instructions
Combination switch ..........................126
Consumption statistics (on-board
computer) .......................................... 233
Convenience closing feature ..............90
Convenience opening/closing (air-
recirculation mode) ........................... 148
Convenience opening feature ............90
Coolan t(engine)
Checkin gthe level ......................... 310
Display message ............................ 259
Important safety notes ..................376
Temperature gauge ........................ 230
Warning lamp ................................. 281
Cooling
see Climate control
Cornering light function
Display message ............................ 256
Function/notes ............................. 128
Crash-responsive emergency light-
ing ....................................................... 132
Cruise control Activation conditions .....................183
Cruise control leve r....................... 183
Deactivating ................................... 185 Index
7

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos-
sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 23). Overview of climate control systems
Important safety notes
G
WARNING
Observe the settings recommended on the
following pages. The windows could other-
wise mist up. This may preven tyou from
observing the traffic conditions, thereby caus-
ing an accident.
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control is only operational when the
engine is running. The system only works
optimally if the side windows and the roof are
closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off (Y page 148).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 90). 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. Aclogged 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 func-
tion may be activated automatically an hour
after the key has been removed. The vehi-
cle is then ventilated for 30minutes to dry
the air-conditioning system. 140
Overview of climate control systemsClimate control

Control panel for THERMATIC automatic climate control (2-zone)
:
Activates/deactivates air-recirculation mode (Y page 147)
; Demists the windscreen (Y page 146)
= Switches the ZONE function on/off (Y page 146)
? Display
A Sets climate control to automatic mod e(Ypage 144)
B Switches cooling with air dehumidification on/off ( Ypage 143)
C Switches the rear window heating on/off (Y page 147)
D Switches climate control on/off (Y page 143)
E Sets the temperature, right (Y page 144)
F Sets the air distribution (Y page 145)
G Sets the airflow (Y page 146)
H Sets the temperature, left (Y page 144)Information about using THERMATIC
automatic climate control
The following contains notes and recommen-
dations on optimum use of THERMATIC auto-
matic climate control.
R Activate climate contro lusing the Ãand
¿ buttons. The indicator lamps above
the à and¿ buttons light up.
R Set the temperature to 22 †.
R Only use the demisting function briefly until
the windscreen is clear again.
R Only use the air-recirculation mode briefly,
e.g. if there are unpleasant outside odours
or when in a tunnel. The windows could otherwise mist up as no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side as well.T he indi-
cator lamp above the ábutton goes
out. Overview of climate control systems
141Climate control Z

Control panel for THERMOTRONIC automatic climate control (3-zone)
Fron
tcontrol panel
: Sets climate control to automatic mode (Y page 144)
; Demists the windscreen (Y page 146)
= Switches the ZONE function on/off (Y page 146)
? Display
A Activates/deactivates air-recirculatio nmode (Y page 147)
B Activates/deactivates the residual heat function (Y page 148)
C Switches cooling with air dehumidification on/off( Ypage 143)
D Switches the rear window heating on/off (Y page 147)
E Switches climate control on/off (Y page 143)
F Sets the temperature, right (Y page 144)
G Sets climate control to automatic (FOCUS/MEDIUM/DIFFUSE )(Y page 144)
H Sets the airflow (Y page 146)
I Sets the air distribution (Y page 145)
J Sets the temperature, left (Y page 144)
Rear control panel
K To increase the temperature (Y page 144)
L Display
M To reduce the temperature (Y page 144)142
Overview of climate control systemsClimate control

Information abou
tusing
THERMOTRONIC automatic climate
control
The following contains instructions and rec-
ommendations to enable you to get the most
out of your THERMOTRONIC automatic cli-
mate control.
R Activate climate control using the Ãand
¿ buttons. The indicato rlamps above
the à and¿ buttons light up.
R In automatic mode, you can also use the
ñ button to set a climate mode
(FOCUS/MEDIUM/DIFFUSE). The
MEDIUM level is recommended.
R Set the temperature to 22 †.
R Only use the demisting function briefly until
the windscree nis clear again.
R Only use the air-recirculation mode briefly,
e.g. if there are unpleasant outside odours
or when in a tunnel. The windows could
otherwise mist up as no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side and the rear com-
partment as well.T he 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 resid-
ual heat function can only be activated or
deactivated with the ignition switched off. Operating the climate control system
Switching climate control on/off
Points to observe before use i
If climate control is switched off, the air
supply and air circulation are also switched
off. Only use this setting for a brief period.
The windows could otherwise mist up.
i Switch on climate control primarily using
the à button (Y page 144). Switching on/off X
Turn the key to position 2in the ignition
lock.
X To switch on: press theÃbutton.
The indicator lamp above the Ãbutton
lights up. Airflow and air distribution are set
to automatic mode.
or
X Press the ^button.
The indicator lamp above the ^button
goes out. The previous settings are reacti-
vated.
X To switch off: press the^button.
The indicator lamp above the ^button
lights up. Activating/deactivating the cooling
with air dehumidification function
Points to observe before use G
WARNING
If the "cooling with air dehumidification" func-
tion is deactivated, the air inside the vehicle
will not be cooled (during warm weather) or
dehumidified. The windows could mist up
more quickly. This may prevent you from
observing the traffic conditions, thereby caus-
ing an accident.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature selec-
ted.
Condensation may drip from the underside of
the vehicle when cooling mode is active. This
is normal and not a sign that there is a mal-
function.
i The cooling with air dehumidification
function uses refrigerant R134a. This
refrigerant does not contain chlorofluoro-
carbons, and therefore does not damage
the ozone layer. Operating the climate control system
143Climate control Z

Switching on/off
X
To activate: press the¿button.
The indicator lamp above the ¿button
lights up.
X To deactivate: press the¿button.
The indicator lamp above the ¿button
goes out. The cooling with air dehumidifi-
cation function has a delayed switch-off
feature.
Problems with the cooling with air
dehumidification function When you press the
¿button, the indica-
tor lamp in the button flashes three times or
remains off. You can no longer switch on the
cooling with air dehumidification function.
X Visit a qualified specialist workshop. Setting climate control to automatic
mode
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
Automatic mode will achieve optimal opera-
tion if cooling with air dehumidification is also
activated. If desired, cooling with air dehu-
midification can be deactivated.
X Turn the key to position 2in the ignition
lock.
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp above the Ãbutton
lights up. Automatic air distribution and air-
flow are activated.
i THERMOTRONIC automatic climate con-
trol: when automatic mode is activated, you
can select a climate mode (Y page 144).
X To deactivate: press the air distribution
button. THERMATIC automatic climate control:
press button
F(Ypage 141).
THERMOTRONIC automatic climate con-
trol: press button I(Ypage 142).
The indicator lamp above the Ãbutton
goes out.
or
X Press the airflow button.
THERMATIC automatic climate control:
press button G(Ypage 141).
THERMOTRONIC automatic climate con-
trol: press button H(Ypage 142).
The indicator lamp above the Ãbutton
goes out. Setting the climate mode
In automatic mode you can select the follow-
ing climate modes:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUSE low airflow that is set slightly warmer and with less of adraught
X Turn the key to position 2in the ignition
lock.
X Press the Ãbutton.
X Press button Gup or downa nd select the
desired level (Y page 142) Setting the temperature
THERMATIC automatic climate control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the key to position 2in the ignition
lock.
X To increase/reduce: press switchEor
H up or down (Y page 141).
Only change the temperatur esetting in
small increments. Start at 22 †. 144
Operating the climate control systemClimate control

Demisting the windows
Windows misted up on th einside X
Activate the ¿cooling with air dehu-
midification function.
X Activate automatic mode Ã.
X If the windows continue to mist up, activate
the demisting function (Y page 146).
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
THERMATIC automatic climat econtrol:
press switch Fup or down ( Ypage 141)
until the PorO symbol appears in
the display.
X THERMOTRONIC automatic climate
control: press button Iup or down
(Y page 142) until the PorO symbol
appears in the display.
i You should only selec tthis setting until
the windscreen is clear again. Rear window heating
Switching on/off G
WARNING
Clear all windows of ice or snow before setting
off. Otherwise, impaired visibility could
endanger you and others.
The rear window heating has ahigh current
draw. You should therefore switch it off as
soon as the window is clear .Itotherwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rea rwin-
dow heating may switch off. X
Turn the key to position 2in the ignition
lock.
X Press the ¤button.
The indicator lamp above the ¤button
lights up or goes out.
Problems with the rea rwindow heating The rear window heating has switched off
prematurely or cannot be activated.
X
Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window heating is activated again
automatically. Activating/deactivating air-recircula-
tion mode
G
WARNING
Only switch over to air-recirculatio nmode
briefly at low outside temperatures. Other-
wise, the windows could mist up, thus impair-
ing visibility and endangering yourself and
others. This may prevent you from observing
the traffic conditions, thereby causing an
accident.
You can deactivate the flow of fresh air if
unpleasant odours are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
The operation of air-recirculation mode is the
same for all control panels.
X Turn the key to position 2in the ignition
lock.
X To activate: press thegbutton.
The indicator lamp above the gbutton
lights up.
i In the event of high pollution levels 1
or at
high outside temperatures, air-recircula-
tion mode is automatically activated. When
air-recirculation mode is activated auto-
1 THERMOTRONIC automatic climate control only. Operating the climate control system
147Climate control Z

Setting the centre air vents
:
Centre air vent, left
; Centre air vent, right
= Centre vent thumbwheel, right
? Centre vent thumbwheel, left
X To open/close: turn thumbwheels =
and ?up or down. Setting the side air vents
X
To open/close: turn thumbwheel =up or
down.
i Side window demister vent :is only
open when side air vent ;is open. Setting the glove compartment air
vent
! Close the air vent when heating the vehi-
cle.
At high outside temperatures, open the air
vent and activate the "cooling with air dehu- midification" function. Otherwise, temper-
ature-sensitive items stored in the glove
compartmen
tcould be damaged. :
Air vent thumbwheel
; Air vent
When automatic climate control is activated,
the glove compartment can be ventilated, for
instance to cool its contents.T he level of air-
flow depends on the airflow and air distribu-
tion settings.
X To open/close: turn thumbwheel :
clockwise or anti-clockwise. Setting the rear-compartment air
vents
Setting the centre vents in the rear com-
partment :
Rear-compartment air vent thumbwheel
; Rear-compartment air vent, right 154
Adjusting the air ventsClimate control

Display messages Possible causes/consequences and
M Solutions
b
Switch off lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Tur nthe light switch to Ã. Adaptive Main-beam
Assist inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Main-beam
Assist currently
unavailable See
Owner's Manual Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
X Cleant he windscreen.
If the system detects that the camera is fully operational again,
the Adaptive Main-beam Assist available again message
is displayed.
Adaptive Highbeam Assist is operational again. Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
up coolant See
Owner's Manual The coolant level is too low.
!
Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Top up the coolant, observing the warning notes before doing
so (Y page 310).
X If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ? The fan motor is faulty.
X
If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Display messages
259On-board computer and displays Z