light MERCEDES-BENZ S-CLASS SEDAN 2012 Service Manual

Seats
Important safety notes
GWARNING
In order to avoid possible loss of vehicle
control, all seat, head restraint, steering
wheel and rear view mirror adjustments, as
well as fastening of seat belts, must be done
before setting the vehicle in motion.
GWARNING
Do not adjust the driver's seat while driving.
Adjusting the seat while driving could cause
the driver to lose control of the vehicle.
Never travel in a moving vehicle with the seat
backrest in an excessively reclined position as
this can be dangerous. You could slide under
the seat belt in a collision. If you slide under
it, the seat belt would apply force at the
abdomen or neck. This could cause serious or
fatal injuries. The seat backrest and seat belts
provide the best restraint when the wearer is
in a position that is as upright as possible and
seat belts are properly positioned on the
body.
GWARNING
Your seat belt must be adjusted so that you
can correctly fasten your seat belt.
Observe the following points:
R adjust the seat backrest until your arms are
slightly angled when holding the steering
wheel.
R adjust the seat to a comfortable seating
position that still allows you to reach the
accelerator/brake pedal safely. The
position should be as far back as possible
with the driver still able to operate the
controls properly.
R adjust the head restraint so that it is as
close to the head as possible and the center
of the head restraint supports the back of
the head at eye level.
R never place hands under the seat or near
any moving parts while a seat is being
adjusted.
Failure to do so could result in an accident
and/or serious personal injury.GWARNING
The electrically adjustable seats can be
operated at any time. Therefore, do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. A child's
unsupervised access to a vehicle could result
in an accident and/or serious personal injury.
GWARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information, see the
"Children in the vehicle" section.
A child's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
GWARNING
For your protection, drive only with properly
positioned head restraints.
Adjust the head restraint so that it is as close
to the head as possible and the center of the
head restraint supports the back of the head
at eye level. This will reduce the potential for
injury to the head and neck in the event of an
accident or similar situation.
Seats107Seats, steering wheel and mirrorsZ

You can use the override button to disable
this function ( Y page 71).
The button is located in the rear door on the
front-passenger side.:To select the front-passenger seat or rear-
compartment seat;Seat height=Head restraint height?Backrest angleASeat fore-and-aft adjustmentXTo select the front-passenger seat:
press button :.
The front-passenger seat is selected if the
indicator lamp in the button lights up.XAdjust the front-passenger seat with
buttons ;, = , ? and A.XTo select the rear-compartment seat:
press button :.
The rear-compartment seat is selected
again.
Adjusting the head restraints
Adjusting the head restraint height
electrically
XTo adjust the head restraint height: slide
the switch for head restraint adjustment
( Y page 108) up or down in the direction of
the arrow.Adjusting the NECK-PRO head
restraints
Adjusting
XPull or push the bottom of NECK-PRO head
restraint :.
Resetting
The NECK-PRO head restraints are moved
forwards in the event of a rear collision in the
direction of travel and have to be reset
afterwards ( Y page 60).
Adjusting NECK-PRO luxury head
restraints
Adjusting
GWARNING
When folding back the side cushions, do not
hold the area between the side cushion and
the cushion holder. There is a danger of
becoming trapped.
You can adjust side bolsters : of the NECK-
PRO luxury head restraints individually.
110SeatsSeats, steering wheel and mirrors

You can adjust side bolsters : of the luxury
head restraint individually.
XTo adjust the side bolsters of the head
restraint: push or pull side bolsters : into
the desired position.XTo adjust the head restraint angle: hold
the head restraint by the upper edge and
slide it forwards or back in the direction of
arrow ;.
Adjusting the multicontour seat
You can adjust the multicontour seat using
COMAND ( Y page 274).
Adjusting the multicontour seat in the
rear compartment
You can use the buttons on the center
console to adjust the multicontour seats for
the outer seats in the rear compartment.
XTo select a rear-compartment seat: push
or pull rocker switch : or C forwards or
backwards.
The indicator lamp in the selected button
lights up briefly.XTo adjust the side bolsters of the seat
backrest: push or pull rocker switch B
forwards or backwards.XTo adjust the backrest contour: push or
pull rocker switch A forwards or
backwards.XTo adjust the position of the backrest
contour: push or pull rocker switch ?
forwards or backwards.XTo activate/deactivate the gentle
massage function: push or pull rocker
switch = forwards or backwards.XTo activate/deactivate the strong
massage function: push or pull rocker
switch ; forwards or backwards.
Adjusting the active multicontour
seat
You can adjust the active multicontour seat
using COMAND ( Y page 276).
i If PRE-SAFE ®
has been activated, the air
pressure in the air chambers of the
multicontour seat or active multicontour
seat is increased. These air chambers are
located in the side bolsters of the seat
cushion and backrest.
Adjusting the lumbar support
You can adjust the lumbar support using
COMAND ( Y page 274).
112SeatsSeats, steering wheel and mirrors

Switching the seat heating on/off
Switching on/offGWARNING
Repeatedly setting the seat heating to level
3 may result in excessive seat temperatures.
The health of passengers that have limited
temperature sensitivity or a limited ability to
react to excessively high temperatures may
be affected or they may even suffer burn-like
injuries. Therefore, do not use seat heating
level 3 repeatedly.
The three red indicator lamps in the button
indicate the heating level you have selected.
i If the battery voltage is too low, the seat
heating may switch off.
The system automatically switches down
from level 3 to level 2 after approximately
eight minutes.
The system automatically switches down
from level 2 to level 1 after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1.
XMake sure that the SmartKey is in position
1 or 2 in the ignition lock.XTo switch on: press button : repeatedly
until the desired heating level is set.XTo switch off: press button : repeatedly
until all the indicator lamps go out.Problems with the seat heating
The seat heating has switched itself off
prematurely. The vehicle's electrical system
voltage is too low because too many electrical
consumers are switched on.
XSwitch off electrical consumers that you do
not need, such as the rear window
defroster or interior lighting.
Switching the seat ventilation on/off
Switching on/off
The three blue indicator lamps in the buttons
indicate the ventilation level you have
selected.
i If the battery voltage is too low, the seat
ventilation may switch off.
XMake sure that the SmartKey is in position
2 in the ignition lock.XTo switch on: press button : repeatedly
until the desired ventilation level is set.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature ( Y page 96). The seat
ventilation of the driver's seat
automatically switches to the highest level.
XTo switch off: press button : repeatedly
until all the indicator lamps go out.Seats113Seats, steering wheel and mirrorsZ

Problems with the seat ventilation
The seat ventilation has switched off
prematurely. The vehicle's electrical system
voltage is too low because too many electrical
consumers are switched on.
XSwitch off electrical consumers which you
do not need, such as the rear window
defroster or interior lighting.
Steering wheel
Important safety notes
GWARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child's unsupervised access to a
vehicle could result in an accident and/or
serious personal injury.
Adjusting the steering wheel
:To adjust the steering wheel position
(fore-and-aft adjustment);To adjust the steering wheel heighti Other topics:
R EASY-ENTRY/EXIT feature
( Y page 115)
R storing settings ( Y page 118)
R operating the on-board computer
( Y page 375)
Steering wheel heating
Switching on/off
The steering-wheel heating heats the leather
areas of the steering wheel.
XMake sure that the SmartKey is in position
2 in the ignition lock.XTo switch on/off: turn the lever in the
direction of arrow : or ;.
Indicator lamp = lights up or goes out.
Vehicles without KEYLESS-GO: when you
remove the SmartKey from the ignition lock,
the steering wheel heating is deactivated.
Vehicles with KEYLESS-GO: when you switch
off the ignition and open the driver's door, the
steering wheel heating is deactivated.
i The steering wheel heating is deactivated
when the temperature in the vehicle
interior is higher than 86 ‡ (30 †).
i The steering wheel heating is switched off
automatically after about 24 minutes.
114Steering wheelSeats, steering wheel and mirrors

Mirrors
Exterior mirrors
Adjusting the exterior mirrors
GWARNING
Exercise care when using the passenger-side
exterior rear view mirror. The mirror surface
is convex (outwardly curved surface for a
wider field of view). Objects in mirror are
closer than they appear. Check your interior
rear view mirror and glance over your
shoulder before changing lanes.
The exterior mirrors are automatically heated
if the rear window defroster is switched on
and the outside temperature is low.
XMake sure that the SmartKey is in position
1 or 2 in the ignition lock.XPress button ; for the right-hand exterior
mirror or button = for the left-hand
exterior mirror.
The indicator lamp lights up in the button
that has been pressed.XPress adjustment button : up, down, to
the left or right until you have adjusted the
exterior mirror to the correct position. You
should have a good overview of traffic
conditions.Folding the exterior mirrors in or out
electricallyXMake sure that the SmartKey is in position
1 or 2 in the ignition lock.XBriefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
Folding the exterior mirrors in or out
automatically
When the "Automatic mirror folding" function
is activated in COMAND ( Y page 266):
R the exterior mirrors fold in automatically as
soon as you lock the vehicle from the
outside.
R the exterior mirrors fold out again
automatically as soon as you unlock the
vehicle and then open the driver's or front-
passenger door.
i If the exterior mirrors have been folded in
manually, they do not fold out.
Exterior mirror out of position
If an exterior mirror has been pushed out of
position, proceed as follows:
116MirrorsSeats, steering wheel and mirrors

XPress the mirror-folding button
( Y page 116) repeatedly until you hear the
mirror engage in position.
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
( Y page 116).
Automatic anti-glare mirrors
GWARNING
If incident light from headlamps is prevented
from striking the sensor in the rear-view
mirror, for instance, by luggage piled too high
in the vehicle, the mirror's automatic anti-
glare function will not operate.
Incident light could then blind you. This may
distract you from the traffic conditions and,
as a result, you may cause an accident.
The rear-view mirror and the exterior mirror
on the driver's side automatically go into anti-
glare mode if the ignition is switched on and
incident light from headlamps strikes the
sensor in the rear-view mirror.
The mirrors do not go into anti-glare mode if
reverse gear is engaged or the interior lighting
is switched on.
Parking position for the exterior
mirror on the front-passenger side
Setting and storing the parking position
You can position the front-passenger side
exterior mirror in such a way that you can see
the rear wheel on that side as soon as you
engage reverse gear. You can store this
position.
XMake sure that the vehicle is stationary and
that the SmartKey is in position 2 in the
ignition lock.XPress button = for the exterior mirror on
the front-passenger side.XEngage reverse gear.
The exterior mirror on the front-passenger
side moves to the preset parking position.XUse adjustment button ; to adjust the
exterior mirror. You should see the rear
wheel and the curb in the exterior mirror.
The parking position is stored.
i If you shift the transmission to another
position, the exterior mirror on the front-
passenger side returns to the driving
position.
i You can also store the parking position
using memory button M : .
XMake sure that the SmartKey is in
position 2 in the ignition lock.XWith the exterior mirror on the front-
passenger side activated, use
adjustment button ; to adjust the
exterior mirror. You should see the
rear wheel and the curb in the exterior
mirror on the front-passenger side.XPress memory button M : and one of
the arrows on adjustment button ;
within three seconds.
The parking position is stored if the
exterior mirror does not move.
If the mirror moves out of position, repeat
the steps.
Mirrors117Seats, steering wheel and mirrorsZ

NaviAudioTelephoneVideoVehicleModeFM/AM radioVideo DVDECOMap orientationSat radioAUXMulticontour
seat/lumbar
settingsPoint of interest
symbols on the mapDiscVideo offRear window
blindTraffic symbols on the
mapMemory cardEASY-ENTRY/
EXIT systemText information on
mapMUSIC
REGISTERExterior
lighting
delayed
switch-offO Topographical
mapMedia
InterfaceInterior
lighting
delayed
switch-offO City viewUSBAmbient
lightingO Freeway
informationRearO Automatic
mirror fold-in
functionO Volume reductionAUXO Locator
lightingSIRIUS serviceAudio offO Automatic
lockingMap versionO Interior
motion sensorO Tow-away
alarmO Trunk lid
opening height
restrictionSPLITVIEW
SPLITVIEW allows you to simultaneously use
different COMAND functions on the front-
passenger side and on the driver's side.
Depending on the viewing angle of the display
(from the driver's seat or from the front-
passenger seat), you will see two different
displays.126At a glanceCOMAND

switch SPLITVIEW on and off
( Y page 129).
The SPLITVIEW screen remains on for
approximately 30 minutes after the SmartKey
has been turned to position 0 in the ignition
lock. After this time or after the SmartKey has
been removed, the settings on the front-
passenger side are saved for approximately
30 minutes longer. After this period,
reactivation on the front-passenger side
means that the settings from the driver's side
will be used.
Cordless headphones for the front
passenger
There are different cordless headphones for
the front passenger and the rear
compartment.
The cordless headphones for the front
passenger can be identified by SPLITVIEW
symbol : on the headband.
The cordless headphones for the front
passenger cannot be used in the rear
compartment. Equally, the headphones for
the rear compartment cannot be used by the
front passenger.
Swiveling the COMAND display and
setting the brightness
You can swivel the COMAND display 5
. The
buttons are located beside the COMAND
display.
Swiveling:To swivel the display to the left;To swivel the display to the right
Setting the brightness
:Brightness of the instrument cluster
lighting;Brightness of the COMAND display
Brighter or dimmer:
XTurn control : or ; clockwise or counter-
clockwise.
i If Night View Assist Plus is activated, only
the brightness of the multifunction display
is adjusted with control :.
Display design
When the default settings are selected, the
display automatically switches between day
design and night design.
You can change these settings using
COMAND ( Y page 147).
5
Not with SPLITVIEW.128At a glanceCOMAND

Cleaning instructions
! Do not touch the COMAND display. The
display has a very sensitive high-gloss
surface; there is a risk of scratching. If you
have to clean the screen, however, use a
mild cleaning agent and a soft, lint-free
cloth.
The display must be switched off and have
cooled down before you start cleaning. Clean
the display screen, when necessary, with a
commercially available microfiber cloth and
cleaning agent for TFT/LCD displays. Then,
dry the surface with a dry microfiber cloth.
Avoid using alcoholic thinners, gasoline or
abrasive cleaning agents. These could
damage the display surface. Do not apply
pressure to the display surface when cleaning
it, as this could cause irreversible damage.
Remote control
Overview
You can use the remote control to operate the
COMAND display, SPLITVIEW and either one
of the rear-compartment screens.
:To switch the screen on/off (Rear Seat
Entertainment System only);To switch the button lighting on/off=To select the screen for remote control
operation ( COMAND, SPLITVIEW , L
REAR and REAR R can be selected)?To select a menu or menu itemATo confirm a selection or settingBMuteCTo adjust the volume (for corded
headphones only)DCOMAND: to set the station, skip track,
fast forward/rewind, for example. Rear
Seat Entertainment System: skip track,
fast forward/rewindECOMAND: to select a station from
presets, select a track, enter directly,
enter a phone number, for example. Rear
Seat Entertainment System: to select a
track, enter directlyFTo exit a menu (back)XPoint the remote control at the
corresponding screen and execute the
functions by pressing the corresponding
buttons.
i The remote control's function may be
restricted depending on the angle at which
it is pointed at the respective screen.
Selecting the screen for the remote
control
XTurn thumbwheel = until the desired
display is highlighted in the window.
Switching the screen on/off (Rear Seat
Entertainment System only)
If the SmartKey is in the ignition lock in
position 0 or 1 or if the SmartKey is not in the
ignition lock, the rear screens will switch off
after 30 minutes. Before the screens switch
off, they show a message to this effect.
You can switch the screens back on.
However, this will discharge the starter
battery.
At a glance129COMANDZ