2012 MERCEDES-BENZ S-CLASS SEDAN coolant temperature

Climate controlAutomatic climate control .............295
COMAND ....................................... 269
Controlling automatically ...............297
Controlling centrally (COMAND) ....272
Cooling with air dehumidification ..297
Cooling with air dehumidification
(COMAND) ..................................... 271
Defrosting the windows .................300
Defrosting the windshield ..............300
Important safety notes ..................294
Indicator lamp ................................ 297
Main menu ..................................... 271
Maximum cooling .......................... 300
Notes on using automatic climate
control ........................................... 296
Overview of systems ......................294
Problems with cooling with air
dehumidification ............................ 297
Problem with the rear window
defroster ........................................ 301
Rear compartment (COMAND) ......273
Rear control panel .........................295
Setting the air distribution .............299
Setting the airflow .........................299
Setting the airflow (COMAND) .......273
Setting the air vents ......................302
Setting the footwell temperature
(COMAND) ..................................... 272
Setting the temperature ................298
Switching air-recirculation mode
on/off ............................................ 301
Switching on/off ........................... 296
Switching residual heat on/off ......302
Switching the rear window
defroster on/off ............................ 301
Coat hooks ......................................... 436
Cockpit Overview .......................................... 36
see Instrument cluster
Color, setting (TV, video) .................. 244
COMAND At a glance (overview) .................... 122
Back button ................................... 123
Basic functions .............................. 137
Components .................................. 122
Display ........................................... 125
Example of operation .....................132Function buttons ........................... 123
Menu overview .............................. 125
Remote control .............................. 129
Switching on/off ........................... 137
System settings ............................. 147
COMAND controller ........................... 122
COMAND display Cleaning instructions .....................129
Folding in and swiveling .................128
Setting ........................................... 147
COMAND operating system .............. 122
Combination switch .......................... 283
Compass function ............................. 192
Conference connection ..................... 205
Consumption statistics (on-board
computer) .......................................... 378
Contrast, setting (TV, video) ............ 244
Convenience closing feature .............. 97
Convenience opening feature ............ 96
Convenience telephone Importing contacts ........................208
Convenience telephony .................... 197
Introduction ................................... 197
Coolant (engine)
Checking the level .........................463
Display message ............................ 406
Filling capacity ............................... 530
Notes ............................................. 530
Temperature (on-board computer) . 381
Temperature gauge ........................ 374
Cooling
see Climate control
Copy protection (CD/DVD) ............... 234
Cornering light function Display message ............................ 403
Function/notes ............................. 284
Cruise control
Cruise control lever .......................335
Deactivating ................................... 336
Display message ............................ 417
Driving system ............................... 334
Function/notes ............................. 334
Important safety notes ..................334
Setting a speed .............................. 335
Storing and maintaining current
speed ............................................. 3358Index

Switching between picture
formats (TV, video) ............................ 245
Switching between summer time
and standard time ............................. 148
Switching off the alarm (ATA) ............ 79
Switching the hands-free
microphone on/off ............................ 205
Switching wavebands (radio) ........... 216
System settings
Bluetooth ®
..................................... 151
Date ............................................... 148
Language ....................................... 153
Programmable button (COMAND) ..124
Text reader speed ..........................149
Time ............................................... 148
Time zone ...................................... 148
Voice Control System ....................149
T
Tachometer ........................................ 375
Tail lamps Display message ............................ 404
Tank
see Fuel tank
Tank content
Fuel gauge ....................................... 37
Technical data
Notes ............................................. 522
Tires/wheels ................................. 515
Vehicle data ................................... 531
TELEAID
Automatic retrieval of vehicle data
(service due date) ..........................451
Call priority .................................... 449
Display message ............................ 398
Downloading destinations
(COMAND) ..................................... 449
Emergency call .............................. 446
Important safety notes ..................445
Locating a stolen vehicle ...............452
MB info call button ........................448
Remote vehicle locking ..................451
Roadside Assistance button ..........447
Search & Send ............................... 450
Self-test ......................................... 446
System .......................................... 445
Vehicle remote unlocking ..............451
Telephone
Accepting/ending a call ................203
Accepting a call ............................. 384
Adjusting the volume for calls .......138
Basic menu (Bluetooth ®
interface) ....................................... 202
Calling (outgoing call) ....................204
Calling voicemail ............................ 205
Conference connection .................. 205
Connecting a mobile phone
(general information) .....................199
De-authorizing a mobile phone ......202
Ending an active call ......................205
Entering a number .........................204
External authorization
(Bluetooth ®
) ................................... 201
Function restrictions ......................198
General notes ................................ 197
Keypad ........................................... 124
Menu (on-board computer) ............384
Number from the phone book ........ 384
Operating options ..........................198
Overview of functions ....................205
Reception and transmission
volume ........................................... 203
Redialing ........................................ 385
Rejecting/ending a call .................384
Rejecting a call .............................. 203
Rejecting or accepting a waiting
call ................................................. 205
Safety notes .................................. 197
Sending DTMF tones ...................... 207
Switching hands-free microphone
on/off ............................................ 205
Toggling ......................................... 205
Using the telephone ....................... 203
see Bluetooth ®

see Call lists
Telephone mode
Redialing ........................................ 204
Telephone module with
Bluetooth ®
SIM Access Profile
see Separate installation instructions
Temperature
Coolant .......................................... 374
Coolant (on-board computer) ......... 381
Engine oil (on-board computer) ...... 381Index23

Instrument cluster
Displays
FunctionPage:Coolant temperature374;Fuel gauge=PARKTRONIC350?Multifunction display376SpeedometerATransmission position315BTachometer375CDrive program317DParking Guidance353FunctionPageEUnit of measurement for
the speedometer
388
FOutside temperature375GAdditional speedometer388HHOLD function346Ä PRE-SAFE ®
Brake77IAdaptive Highbeam Assist284Lane Keeping Assist or
Active Lane Keeping Assist365, 369ATTENTION ASSIST359Instrument cluster37At a glance

Switching the rear-compartment
climate control on/off using the rear
control panelXTurn the SmartKey to position 2 in the
ignition lock.XTo switch on: press rocker switch
K (Y page 295) up or down and select
AUTO .
or
XPress rocker switch K(Y page 295) up or
down and select MAN.XTo switch off: press rocker switch
K (Y page 295) up or down and select
OFF .
Activating/deactivating cooling with
air dehumidification
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.
You can activate or deactivate the cooling
with air dehumidification function via
COMAND ( Y page 271).
i The cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
Problems with the cooling with air
dehumidification function
If you can no longer switch on the cooling with
air dehumidification function via COMAND,
the cooling with air dehumidification function
is switched off due to a malfunction.
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.
Controlling the front climate control
using the front control panel
XTurn the SmartKey to position 2 in the
ignition lock.XSet the desired temperature.X To switch on: press the à rocker
switch up or down.
The indicator lamp in the à rocker
switch lights up.Operating the climate control systems297Climate controlZ

iAir-recirculation mode deactivates
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡ (5 †)
Activating/deactivating the residual
heat function
It is possible to make use of the residual heat
of the engine to continue heating the
stationary vehicle for up to 30 minutes after
the engine has been switched off. The heating
time depends on the temperature that has
been set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
XTurn the SmartKey to position 0 in the
ignition lock or remove it.XTo activate: press the Ì rocker switch
up or down.
The indicator lamp in the Ì rocker
switch lights up.XTo deactivate: press the Ì rocker
switch up or down.
The indicator lamp in the Ì rocker
switch goes out.
i Residual heat is deactivated
automatically:
R after about 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R if the coolant temperature is too low
Setting the air vents
Important safety notes
GWARNING
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air intake grille on the hood free
of blockages, such as ice, snow or leaves
R never cover the air vents or air intake grille
in the vehicle interior.
i For virtually draft-free ventilation, adjust
the sliders of the air vents to the center
position.
Setting the center air vents
:Fixed center air vent;Center air vent, right=Center vent thumbwheel, right302Setting the air ventsClimate control

Problems with the engineProblemPossible causes/consequences and M SolutionsThe engine does not
start. The starter motor
can be heard.R There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.XBefore attempting to start the engine again, turn the SmartKey
in the ignition back to position 0 or press the Start/Stop button
repeatedly until all indicator lamps in the instrument cluster go
out.XTry to start the engine again ( Y page 308). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak
or discharged.XJump-start the vehicle ( Y page 483).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.The starter motor was exposed to a thermal load that was too high.XAllow the starter motor to cool down for approximately two
minutes.XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.Vehicles with a
gasoline engine:
The engine is not
running smoothly and
is misfiring.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.XOnly depress the accelerator pedal slightly.XHave the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.The coolant
temperature gauge
shows a value above
248 ‡ (120 †).The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.XStop as soon as possible and allow the engine and the coolant
to cool down.XCheck the coolant level ( Y page 463). Observe the warning
notes as you do so and add coolant if necessary.Driving313Driving and parkingZ

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 31).
Important safety notes
You will find an illustration of the instrument
cluster in the "At a glance" section
( Y page 37).
GWARNING
The driver's concentration must always be
directed primarily at road traffic.
For your safety and the safety of others,
selecting features through the multifunction
steering wheel should only be done by the
driver when traffic and road conditions permit
it to be done safely.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers
a distance of 44 feet (approximately 14 m) per
second.
GWARNING
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see
information about your driving conditions,
such as
R speed
R outside temperature
R warning/indicator lamps
Rmalfunction/warning messages
R failure of any systems
Driving characteristics may be impaired.
If you must continue to drive, do so with added
caution. Contact an authorized Mercedes-
Benz Center as soon as possible.GWARNING
HYBRID vehicles: It is imperative that you read
the HYBRID Supplemental Operating
Instructions included in your vehicle literature
portfolio. You may otherwise not receive all
necessary safety information and warning for
the operation of your vehicle.
GWARNING
Malfunction and warning messages are only
indicated for certain systems and are
intentionally not very detailed. The
malfunction and warning messages are
simply a reminder with respect to the
operation of certain systems. They do not
replace the owner's and/or driver's
responsibility to maintain the vehicle's
operating safety. Have all required
maintenance and safety checks performed on
the vehicle. Bring the vehicle to an authorized
Mercedes-Benz Center to address the
malfunction and warning messages.
Displays and operation
Coolant temperature display
GWARNING
Driving when your engine is overheated can
cause some fluids which may have leaked into
the engine compartment to catch fire. You
could be seriously burned.
Steam from an overheated engine can cause
serious burns which can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of the
374Displays and operationOn-board computer and displays

vehicle and do not stand near the vehicle until
the engine has cooled down.
The coolant temperature gauge is in the
instrument cluster on the left-hand side.
Under normal operating conditions and with
the specified coolant level, the coolant
temperature may rise to 248 ‡ (120 †).
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over
248 ‡(120 †), do not continue driving. The
engine will otherwise be damaged.
Tachometer
The red band in the tachometer indicates the
engine's overrevving range.
! Do not drive in the overrevving range, as
this could damage the engine.
The fuel supply is interrupted to protect the
engine when the red band is reached.
Outside temperature display
The outside temperature display is in the
multifunction display ( Y page 376).
GWARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
Changes in the outside temperature are
displayed after a short delay.
Operating the on-board computer
The on-board computer is activated as soon
as you turn the SmartKey to position 2 in the
ignition lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel.:Multifunction display;~
Rejects or ends a call
Exits phone book/redial memory
6
Makes or accepts a call
Switches to the redial memory
WX
Adjusts the volume or operates the
RACETIMER in AMG vehicles
8
Mute=?
Switches on the Voice Control
System; see the separate operating
instructionsDisplays and operation375On-board computer and displaysZ