2012 MERCEDES-BENZ C-Class SEDAN Owner's Manual

The time period starts over again if, within
these three minutes, you:
R open or close a front door
R insert the SmartKey into the ignition lock
or remove it from the ignition lock
R switch the ignition on or off
If the SmartKey is in position 2 in the
ignition lock, the seats can be adjusted at
any time.
Depending on the equipment, the seat
adjustment buttons are either located on the
side of the seat or on the door control panel.:Head restraint height;Seat cushion angle=Seat height?Seat fore-and-aft adjustmentABackrest angle:Seat cushion angle;Seat height=Seat fore-and-aft adjustment?Backrest anglei You can store the seat settings using the
memory function ( Y page 103).
i AMG vehicles are equipped with a seat
featuring an integrated head restraint and
the head restraint adjustment button is
deactivated. It is therefore not possible to
set the height and angle of the head
restraint.
Adjusting the head restraints
Adjusting the head restraints manually
Adjusting the head restraint height 3
XTo raise:
pull the head restraint up to the
desired position.XTo lower: press release catch : in the
direction of the arrow and push the head
restraint down to the desired position.
Adjusting the angle of the head restraints
3 For vehicles without memory function only.Seats95Seats, steering wheel and mirrorsZ

XPush or pull the lower edge of the head
restraint in the direction of the arrow.
Adjusting the head restraint height
electrically 4
XTo adjust the head restraint height:
slide
the switch for head restraint adjustment
( Y page 94) up or down in the direction of
the arrow.
Adjusting luxury head restraints
GWARNING
When folding back the side cushions, never
reach between the side cushion and the
mounting post. You could otherwise be
trapped.
XTo adjust the side bolsters of the head
restraint: push or pull right and/or left-
hand side bolster : into the desired
position.XTo adjust the angle of the head
restraint: push or pull the head restraint in
the direction of arrow ;.
Rear seat head restraints
GWARNING
For safety reasons, always drive with the rear
head restraints in the upright position when
the rear seats are occupied.
Keep the area around head restraints clear of
articles (e.g. clothing) to not obstruct the
folding operation of the head restraints.GWARNING
For your protection, drive only with properly
positioned head restraints.
Adjust the head restraint in such a way 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.
With a rear seat occupied, make sure to move
the respective head restraint up from the
lowest non-use position and have the
occupant adjust the head restraint properly.
Do not drive the vehicle without the seat head
restraints installed when the rear seats are
occupied. Head restraints are intended to
help reduce injuries during an accident.
Adjusting the rear seat head restraint
height
If the head restraint is fully lowered, it is
necessary to press release catch :.
XTo raise: pull the head restraint up to the
desired position.XTo lower: press release catch : and push
the head restraint down until it is in the
desired position.4 For vehicles with memory function only.96SeatsSeats, steering wheel and mirrors

Removing and installing rear head
restraints 5GWARNING
Occupants should only travel sitting on seats
which have the head restraints installed. In
the event of an accident, this reduces the risk
of injury for passengers seated in the rear
compartment.
XRelease the rear seat backrest and fold it
slightly forwards ( Y page 257).XTo remove: pull the head restraint up to
the stop.XPress release catch : and pull the head
restraint out of the guides.XTo re-install: insert the head restraint so
that the notches on the bar are on the left
when viewed in the direction of travel.XPush the head restraint down until you hear
it engage in position.XFold back the rear seat backrest until it
engages.
Adjusting the lumbar support
You can adjust the contour of the front seats
so as to provide optimum support for your
back.
XMove adjustment lever : in the direction
of the arrow until the desired backrest
contour is achieved.
Adjusting the four-way lumbar
support
You can adjust the contour of the front seat
backrests individually to provide optimum
support for your back.
:To raise the backrest contour;To soften the backrest contour=To lower the backrest contour?To harden the backrest contour
Adaptive backrest (AMG vehicle)
You can adjust the contour of the front seat
backrests individually so as to provide
optimum support for your back.
5 Only for vehicles with through-loading facility.Seats97Seats, steering wheel and mirrorsZ

:To adjust the upper back support;To adjust the contour of the backrest in
the lumbar region=To adjust the lateral structure and support
of the seatXMake sure that the SmartKey is in position
2 in the ignition lock.
i
If, after a certain amount of time, the seat
no longer has the desired contour, repeat
the adjustment.
Switching the seat heating on/off
Switching on/off
GWARNING
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.
Driver's and front-passenger seat
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 off
prematurely or cannot be switched on. 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.
Switching the seat ventilation on/off
Switching on/off
The three blue indicator lamps in the buttons
indicate the ventilation level you have
selected.
98SeatsSeats, steering wheel and mirrors

iIf 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 84). 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.
Problems with the seat ventilation
The seat ventilation has switched off
prematurely or cannot be switched on. 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, or
driving without the steering wheel adjustment
feature locked 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
manually
:Release lever;To adjust the steering wheel height=To adjust the steering wheel position
(fore-and-aft adjustment)XPush release lever : down completely.
The steering column is unlocked.XAdjust the steering wheel to the desired
position.XPush release lever : up completely.
The steering column is locked.XCheck if the steering column is locked.
When doing so, try to push the steering
wheel up or down or try to move it in the
fore-and-aft direction.Steering wheel99Seats, steering wheel and mirrorsZ

Adjusting the steering wheel
electrically:To adjust the steering wheel height;To adjust the steering wheel position
(fore-and-aft adjustment)
i Other topics:
R EASY-ENTRY/EXIT feature
( Y page 100)
R storing settings ( Y page 103)
EASY-ENTRY/EXIT system
Important safety notes
The EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board
computer ( Y page 209).
GWARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering wheel adjustment stalk or press the
memory position switch.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury.
GWARNING
Let the system complete the adjustment
procedure before setting the vehicle in
motion. All steering wheel adjustment must
be completed before setting the vehicle in
motion. Driving off with the steering wheel
still adjusting could cause the driver to lose
control of the vehicle.
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active
The steering wheel swings upwards when
you:
R remove the SmartKey from the ignition lock
R open the driver's door and KEYLESS-GO is
in position 1
R open the driver's door and the SmartKey is
in position 0 or 1 in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop.
Position of the steering wheel for
driving
The steering wheel is moved to the last
selected position when:
R the driver's door is closed.
R you insert the SmartKey into the ignition
lock.
or
R you press the Start/Stop button once on
vehicles with KEYLESS-GO.
When you close the driver's door with the
ignition switched on, the steering wheel is
also automatically moved to the previously
set position.
The last position of the steering wheel is
stored after each manual setting or when you
store the setting with the memory function
( Y page 103).
100Steering wheelSeats, steering wheel and mirrors

Crash-responsive EASY-EXIT feature
If the crash-responsive EASY-EXIT feature is
triggered in an accident, the steering column
will move upwards when the driver's door is
opened. This occurs irrespective of the
position of the SmartKey in the ignition lock.
This makes it easier to exit the vehicle and
rescue the occupants.
The crash-responsive EASY-EXIT feature is
only operational if the EASY-EXIT/ENTRY
feature is activated in the on-board computer.
Mirrors
Rear-view mirror
Rear-view mirror (manual anti-glare)
Xanti-glare mode: flick anti-glare
switch : forwards or back.
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 left-hand exterior
mirror or button ; for the right-hand
exterior mirror.
The indicator lamp in the corresponding
button lights up in red.
The indicator lamp goes out again after
some time. You can adjust the selected
mirror using adjustment button = as long
as the indicator lamp is lit.XPress adjustment button = up, down, to
the right or to the left until the exterior
mirror is set to a position that provides you
with a good overview of traffic conditions.
Folding the exterior mirrors in or out
electrically
This function is only available in vehicles for
Canada.
Mirrors101Seats, steering wheel and mirrorsZ

XMake 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 the vehicle is
in motion, as they may otherwise vibrate.
i If you are driving faster than
9 mph (15 km/h), you can no longer fold in
the exterior mirrors.
Setting the exterior mirrors
This function is only available in vehicles for
Canada.
If the battery has been disconnected or
completely discharged, the exterior mirrors
must be reset. The exterior mirrors will
otherwise not fold in when you select the
"Fold in mirrors when locking" function in the
on-board computer ( Y page 209).
XMake sure that the SmartKey is in
position 1 in the ignition lock.XBriefly press button :.
Folding the exterior mirrors in or out
automatically
This function is only available in vehicles for
Canada.
If the "Fold in mirrors when locking" function
is activated in the on-board computer
( Y page 209):
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 The mirrors do not fold out if they have
been folded in manually.
Exterior mirror out of position
If an exterior mirror has been pushed out of
position, proceed as follows:
XVehicles without electrically folding
exterior mirrors: move the exterior mirror
into the correct position manually.XVehicles with electronically folding
mirrors 6
: press the mirror-folding button
( Y page 101) 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 101).
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
6 Canada only102MirrorsSeats, steering wheel and mirrors