light MERCEDES-BENZ CLS 2012 Service Manual

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 22).
Correct driver's seat position
Observe the safety guidelines on
( Y page 93).
XCheck whether you have adjusted seat =
properly ( Y page 94).
When adjusting the seat, make sure:
R you are as far away from the driver's air
bag as possible.
R you are sitting in a normal upright
position.
R you can fasten the seat belt properly.Ryou have moved the backrest to an
almost vertical position.
R you have set the seat cushion angle so
that your thighs are gently supported.
R you can depress the pedals properly.XCheck whether the head restraint is
adjusted properly ( Y page 94).
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by
the center of the head restraint.
Observe the safety guidelines on
( Y page 98).
XCheck whether steering wheel : is
adjusted properly.
Adjusting the steering wheel electrically
( Y page 99)
When adjusting the steering wheel, make
sure:
R you can hold the steering wheel with your
arms slightly bent.
R you can move your legs freely.
R you can see all the displays in the
instrument cluster clearly.
Observe the safety guidelines on
( Y page 50).
XCheck whether you have fastened seat
belt ; properly ( Y page 52).
The seat belt should:
R fit snugly across your body.
R be routed across the middle of your
shoulder.
R be routed in your pelvic area across the
hip jointsXBefore starting off, adjust the rear-view
mirror and the exterior mirrors
( Y page 100) in such a way that you have
a good view of road and traffic conditions.XVehicles with a memory function: save
the seat, steering wheel and exterior mirror
settings ( Y page 102).92Correct driver's seat positionSeats, steering wheel and mirrors

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 in the rear
seating positions than in the front seating
position. Thus, we strongly recommend that
children be placed in the rear seats whenever
possible. Regardless of seating position,
children 12 years old and under must be
seated and properly secured in an
appropriately sized infant restraint, toddler
restraint, or booster seat recommended for
the size and weight of the child. For additional
information, see "Children in the vehicle".
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.
Seats93Seats, steering wheel and mirrorsZ

Do not drive the vehicle without the seat head
restraints. Head restraints are intended to
help reduce injuries during an accident.
! To avoid damage to the seats and the seat
heating, observe the following information:
R do not spill any liquids on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not to be used to dry
the seats.
R clean the seat covers as recommended;
see the "Interior care" section.
R do not transport heavy loads on the
seats. Do not place sharp objects on the
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
! When you move the seats, make sure that
there are no objects in the footwell or
behind the seats. Otherwise, you could
damage the seats and the objects.
i The head restraints in the front seats are
installed with the NECK-PRO system
( Y page 48). For this reason, it is not
possible to remove the head restraints
from the front seats.
Please contact an authorized Mercedes-
Benz Center for more information.
i Related topics:
R Rear bench seat through-loading feature
( Y page 259)Adjusting the seats electrically:Head restraint height;Seat cushion angle=Seat height?Seat fore-and-aft adjustmentABackrest angle
i
If PRE-SAFE ®
has been activated, the
front-passenger seat is moved to a better
position if it was previously set unfavorably.
i You can store the seat settings using the
memory function ( Y page 102).
i Vehicles with the through-loading
feature: if you fold down a rear seat
backrest, the respective front seat is
moved forwards slightly in order to avoid
contact.
Adjusting the head restraints
Adjusting the head restraints
electrically
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 the luxury head restraints
GWARNING
When folding back the head restraint side
bolsters, do not put your hands between the
94SeatsSeats, steering wheel and mirrors

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.
Adjusting the multicontour seat 5
You can adjust the contour of the driver's seat
so as to provide optimum support for your
back and sides.
:To adjust the thigh cushion;To adjust the backrest contour in the
lumbar region=To adjust the backrest contour in the
upper back region?To adjust the side bolsters of the seat
backrestXMake sure that the SmartKey is in position
2 in the ignition lock.
Adjusting the active multicontour
seat
The active multicontour seat on the driver's
side automatically adapts the sides of the
backrest to your current driving style. You can
adjust the contour of the seats individually so
as to provide optimum support for your back
and sides.:To adjust the seat cushion length;To switch the dynamic function on or off=To adjust the side bolsters of the seat
backrest?To switch the massage function on or offATo adjust the contour of the backrest to
increase/decrease supportBTo adjust the height/depth of the
backrest contour
Dynamic function
The dynamic function adjusts the air cushions
in the side bolsters of the seat backrests to
ensure ideal lateral support at all times.
You can choose between two different levels.
Level 1 (one
indicator lamp)Standard setting:
slightly increased
lateral support and
slow build-up of air
pressure in the side
bolsters of the seat
backrest.Level 2 (two
indicator lamps)Sport setting:
increased lateral
support and fast
build-up of pressure
in the side bolsters
of the seat backrest.5 Canada only.96SeatsSeats, steering wheel and mirrors

XTo switch on: press button ; once or
twice until the desired level is set.
One or two indicator lamps in button ;
light up.XTo switch off: press button ; repeatedly
until all indicator lamps in button ; go out.
Massage function (PULSE)
The massage function helps you to prevent
muscle tension on long journeys. You can
choose between two levels.
XTo switch on: press button ? once or
twice until the desired level is set.
One or two indicator lamps in button ?
light up. The air cushions in the lumbar
region vibrate for approximately 20
minutes.
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 contourSwitching 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.
Driver's and front-passenger seat
Rear seats 6
The system automatically switches down
from level 3 to level 2 after about eight
minutes (driver's seat and front-passenger
seat) or five minutes (rear seats).
6 Canada only.Seats97Seats, steering wheel and mirrorsZ

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
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.
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 with the SmartKey
( Y page 87). 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
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.
98Steering wheelSeats, steering wheel and mirrors

Adjusting the steering wheel
electrically:To adjust the steering wheel height;To adjust the steering wheel position
(fore-and-aft adjustment)
i Related topics:
R EASY-ENTRY/EXIT feature
( Y page 99)
R Storing settings ( Y page 102)
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.i The steering wheel heating may switch off
temporarily if:
R the temperature of the vehicle interior is
above 86 °F (30 °C)
R the temperature of the steering wheel is
above 95 °F (35 °C).
Indicator lamp = remains on.
Problems with the steering wheel
heating
If the steering wheel heating indicator lamp
on the lower left lever of the steering column
is flashing, the steering wheel heating has
switched off automatically. 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.
Once the battery is sufficiently charged, the
steering wheel heating will switch back on
automatically.
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 212).
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
Steering wheel99Seats, steering wheel and mirrorsZ

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
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.
Setting the exterior mirrors
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 212).
XMake sure that the SmartKey is in
position 1 in the ignition lock.XBriefly press button :.
Folding the exterior mirrors in or out
automatically
If the "Fold in mirrors when locking" function
is activated in the on-board computer
( Y page 212):
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:
XMove the exterior mirror into the correct
position manually.
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.
Mirrors101Seats, steering wheel and mirrorsZ

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 to a position which allows
you to see the rear wheel and the curb.
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 ? .
XWith the SmartKey in position 2 in the
ignition lock and with the exteriormirror on the front-passenger side
activated, use adjustment button = to
set the exterior mirror such that the
rear wheel and curb are visible.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.
Calling up a stored parking position
setting
XWith the SmartKey in position 2 in the
ignition lock and the exterior mirror on the
front-passenger side activated, engage
reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger
side moves back to its original position:
R as soon as you exceed a speed of 6 mph
(10 km/h)
R about ten seconds after you have
disengaged reverse gear
R if you press button : for the exterior
mirror on the driver's side
Memory functions
Storing settings
With the memory function, you can store up
to three different settings, e.g. for three
different people.
The following settings are stored as a single
memory preset:
R position of the seat, backrest and head
restraint
R active multicontour seat: seat cushion
length, lateral cushions of the seat
backrest, contour of the backrest, dynamic
function level
102Memory functionsSeats, steering wheel and mirrors

Useful information ............................106
Exterior lighting ................................ 106
Interior lighting ................................. 111
Replacing bulbs ................................. 112
Windshield wipers ............................113105Lights and windshield wipers