light MERCEDES-BENZ CLS 2014 Repair Manual

Standing lamps

Left-hand standing lamps
\nRight-hand standing lamps
Parking lamps, license plate and
instrumentcluster lighting
\rAutomatic headlamp mode,
controlled by the light sensor
Low-beam/high-beam headlamps
Switchingonthe standinglamps ensuresthe
corresponding side of thevehicle is
illuminated.
XTo switch on thestanding lamps:the
SmartKey is notintheignition lockoritis
in position0.
XTurn thelight switch to(left-handside
of thevehicle)or\n(right-hand side of
thevehicle).
Combination switch
Turn signal
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo indicatebriefly:pressthecombination
switch briefly to thepressure pointinthe
direction of arrowor!.
The corresponding turn signal flashes three
times.
XTo indicate:press the combination switch
beyond the pressure point in the direction
of arrowor!.
High-beam headlamps
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo switch on the high-beam headlamps:
turn the SmartKey in the ignition lock to
position2or start the engine.
XTurn the light switch toor\r.
XPress the combination switch beyond the
pressure point in the direction of
arrow.
In the\rposition, the high-beam
headlamps are only switched on when it is
dark and the engine is running.
Exterior lighting119
Lights and windshield wipers
Z

The blueindicator lamp in the
instrument cluster lights up when the high-
beam headlamps are switched on.
XTo switch off the high-beam
headlamps:move the combination switch
back to its normal position.
The blueindicator lamp in the
instrument cluster goes out.
iVehicles with Adaptive Highbeam Assist:
when Adaptive Highbeam Assist is active,
it controls activation of the high-beam
headlamps (Ypage 121).
High-beam flasher
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo switch on:turn the SmartKey in the
ignition lock to position1or2,orstart the
engine.
XPull the combination switch in the direction
of arrow$.
Hazard warning lamps
XTo switch on the hazard warning lamps:
press button.
All turn signals flash. If you now switch on
aturn signal using the combination switch,
only the turn signal lamp on the
corresponding side of the vehicle will flash.
XTo switch off the hazard warning
lamps:press button.
The hazard warning lamps automatically
switch on if:
Ran air bag is deployed
Rthe vehicle decelerates rapidly from a
speed of more than 45 mph (70 km/h) and
comes toastandstill
The hazard warning lamps switch off
automatically if the vehicle reachesaspeed
of over6mph (10 km/h) again afterafull
brake application.
iThe hazard warning lamps still operate if
the ignition is switched off.
Headlampcleaning system
The headlamps are cleaned automatically if
the "Wipe with washer fluid" function is
operated five times (Ypage 125)while the
lightsare on and the engineisrunning. When
you switchoff the ignition, the automatic
headlamp cleaning systemisreset and
counting is resumed from 0.
120Exterior lighting
Lights and windshield wipers

Cornering lightfunction
The cornering light function improves the
illumination of the road overawideanglein
the direction you are turning, enabling better
visibility in tight bends, for example. It can
only be activated whenthe low-beam
headlamps are switched on.
Active:
Rif you are driving at speeds below 25 mph
(40 km/h)and switch on the turn signal or
turn the steering wheel
Rif you are driving at speeds between
25 mph(40km/h)and 45 mph(70km/h)
and turn the steering wheel
Not active:if you are driving at speeds above
25 mph (40 km/h) or switch off the turn
signalorturn the steering wheel to the
straight-ahead position.
The cornering lamp may remain lit forashort
time, but is automatically switched off after
no more than three minutes.
Active light function
The active light function isasystem that
moves the headlamps according to the
steering movements of the front wheels.In
this way, relevant areasremain illuminated
while driving. Thisallowsyou to identify
pedestrians, cyclists and animals.
Active:whenthe lights are switched on.
Adaptive Highbeam Assist
Important safety notes
GWARNING
Adaptive Highbeam Assist does not recognize
road users:
Rwho have no lights, e.g. pedestrians
Rwho have poor lighting, e.g. cyclists
Rwhose lighting is blocked, e.g. byabarrier
In very rare cases, Adaptive Highbeam Assist
may fail too recognize other road users that
have lights, or may recognize them too late.
In this or similar situations, the automatic
high-beam headlamps will not be deactivated
or activated regardless. There isarisk of an
accident.
Always carefully observe the traffic conditions
and switch off the high-beam headlamps in
good time.
Exterior lighting121
Lights and windshield wipers
Z

You can use this function to set the
headlamps to change betweenlow beam and
high beam automatically. The system
recognizes vehicles with their lights on, either
approaching from the opposite direction or
traveling in front of your vehicle, and
consequently switches the headlamps from
high beam to low beam.
The system automatically adapts the low-
beam headlamp range depending on the
distance to the other vehicle. Once the
system no longer detectsany other vehicles,
it reactivates the high-beam headlamps.
The system's optical sensor is located behind
the windshield near the overhead control
panel.
Switching Adaptive Highbeam Assist
on/off
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo switch on:turn the light switch to
\r.
XPress the combination switch beyond the
pressure point in the direction of
arrow.
Theindicator lamp in the
multifunction display lights up if it is dark
and the light sensor activates the low-beam
headlamps.
If you are driving at speeds above
approximately 28 mph (45 km/h):
The headlamp range is set automatically
depending on the distance between the
vehicle and other road users.
If you are driving at speeds above
approximately 35 mph (55 km/h) and no
other road users have been detected:
The high-beam headlamps are switched on
automatically. Theindicator lamp in
the instrument cluster also lights up.
If you are driving at speeds below
approximately 30 mph (45 km/h) or other
road users have been detected or the roads
are adequately lit:
The high-beam headlamps are switched off
automatically. Theindicator lamp in
the instrument cluster goes out. The
indicator lamp in the multifunction display
remains lit.
XTo switch off:move the combination
switch back to its normal position or move
the light switch to another position.
Theindicator lamp in the instrument
cluster goes out.
Headlamps fogged up on the inside
The headlamps may fog up on the inside if
there is high atmospheric humidity.
XSwitch on the light and drive off.
The level of moisture diminishes,
depending on the length of the journey and
the weather conditions (humidity and
temperature).
If the level of moisture does not diminish:
XHave the headlamps checked ataqualified
specialist workshop.
122Exterior lighting
Lights and windshield wipers

Interior lighting
Overview of interior lighting
Frontoverhead control panel
To switch therear interiorlighting
on/off
To switchthe automatic interior
lighting control on/off
$To switchthe right-handfront
reading lamp on/off
!\rTo switch the front interior lighting
on/off
To switch the left-hand front reading
lamp on/off
Rear-compartment overheadcontrol panel
To switch the right-hand reading
lamp on/off
To switch the left-hand reading lamp
on/off
Interior lighting control
General notes
In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
unless the SmartKey is in position2in the
ignitionlock.
The color and brightness of the ambient
lighting may be set using the on-board
computer (Ypage 231).
Automatic interior lighting control
Frontoverhead control panel
To switch the rear interior lighting
on/off
To switch the automatic interior
lighting control on/off
$To switch the right-hand reading
lamp on/off
!\rTo switch the front interior lighting
on/off
To switch the left-hand reading lamp
on/off
XTo activate/deactivate:press the
button.
When the automatic interior lighting
control is activated, the button is flush with
the overhead control panel.
Interior lighting123
Lights and windshiel dw ipers
Z

The interior lighting automatically switches
on if you:
Runlock the vehicle
Ropenadoor
Rremove the SmartKey from the ignition lock
The interior light is activated forashort while
when the SmartKey is removed from the
ignition lock. You can activatethis delayed
switch-off using the on-board computer
(Ypage 232).
Manualinterior lighting control
Frontoverhead control panel
To switch the rear interior lighting
on/off.
To switch the automatic interior
lighting control on/off
$To switch the right-hand reading
lamp on/off
!\rTo switch the frontinterior lighting
on/off
To switch the left-hand reading lamp
on/off
XTo switch the front interior lighting on/
off:press the\rbutton.
XTo switch the rear interior lighting on/
off:press thebutton.
XTo switch the reading lampson/off:
press thebutton.
Crash-responsive emergency lighting
The interior lighting is activated automatically
if the vehicle is involved in an accident.
XTo switch off the crash-responsive
emergency lighting:press the hazard
warning lamp button.
or
XLock and then unlock the vehicle using the
SmartKey.
Replacing bulbs
Important safety notes
Xenon bulbs
GDANGER
Xenon bulbs carryahigh voltage. You can get
an electric shock if you remove the cover of
the Xenon bulb and touch the electrical
contacts. There isarisk of fatal injury.
Never touch the parts or the electrical
contacts of the Xenon bulb. Always have work
on the Xenon bulbs carried out ataqualified
specialist workshop.
Bulbs and lamps are an importantaspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
LED lamps
You can neither replace Xenon bulbsnor LED
bulbs. Have LED bulbschanged ataqualified
specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Other bulbs
GWARNING
Bulbs, lamps and connectors can get very hot
when operating. If you changeabulb, you
124Replacing bulbs
Lights and windshield wipers

could burn yourselfonthese components.
There isarisk of injury.
Allow these components to cool down before
changingabulb.
There are bulbs other than Xenon and LED
bulbs that you cannot replace. Replace only
the bulbs listed (Ypage 125). Have the bulbs
that you cannot replace yourself changed at
aqualified specialist workshop.
If you require assistance changing bulbs,
consultaqualified specialist workshop.
Do not touch the glass tube of new bulbs with
your bare hands. Even minor contamination
can burn into the glass surface and reduce
the service life of the bulbs. Always usealint-
free cloth or only touch the base of the bulb
when installing.
Only use bulbs of the correct type.
If the new bulb still does not light up, consult
aqualified specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp settingchecked regularly.
Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb
type can be found in the legend.
Tail lamp
Backup lamp:W16W
Changing the rear bulbs
Backup light
Lamp unit
XSwitch off the lights.
XOpen the trunk.
XReach up into the side paneling and pull
downwards until the lamp cluster is easily
accessible.
XPress the detent of connectorand pull
out connector.
XUseasuitable tool to loosen and remove
four nuts.
XRemove the entire lamp cluster.
XTurn bulb holder$counter-clockwise and
pull it out.
XPull out bulb.
XInsert the new bulb into bulb holder$.
XInsert bulb holder$into the lamp and turn
it clockwise.
XRe-insert the lamp cluster.
XTighten four nuts.
XPush in connectoruntil it engages.
XInsert the side paneling.
Windshield wipers
Switching the windshield wiperson/
off
!Do not operatethe windshield wipers
when the windshield is dry, as this could
damage the wiper blades. Moreover, dust
Windshield wipers125
Lights and windshield wipers
Z

thathas collectedonthewindshield can
scratch theglass if wipingtakes placewhen
thewindshield is dry.
If it is necessary to switch on thewindshield
wipersindry weather conditions, always
use washerfluid when operating the
windshield wipers.
!If the windshield wipers leave smearson
the windshield after the vehicle has been
washed in an automatic car wash, wax or
other residues may be the reason for this.
Clean the windshield using washer fluid
after washingthe vehicle in an automatic
car wash.
!Intermittentwiping with rain sensor: due
to optical influences and the windshield
becomingdirtyindry weatherconditions,
the windshield wipers may be activated
inadvertently. This could then damage the
windshield wiper blades or scratchthe
windshield.
For this reason, you should always switch
off the windshield wipers in dry weather.
Combination switch

Windshield wiper off
Intermittent wipe, low (rain sensor
set to low sensitivity)
Intermittent wipe, high (rain sensor
set to high sensitivity)
Continuous wipe, slow
Continuous wipe, fast
%Single wipe/
To wipe the
windshield using washer fluid
XSwitch on the ignition.
XTurn the combination switch to the
corresponding position.
In theorposition, the appropriate
wiping frequency is set automatically
according to the intensity of the rain. In
theposition, the rain sensor is more
sensitive than in theposition, causing
the windshield wipers to wipe more
frequently.
If the wiper blades are worn, the windshield
will no longer be wiped properly. This could
prevent you from observing the traffic
conditions. Replace the wiper blades twice a
year, ideallyinspring and fall.
Replacing the wiper blades
Important safety notes
GWARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could
be trapped by the wiper arm. There isarisk
of injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
!To avoid damaging the wiper blades,
make sure that you touch only the wiper
arm of the wiper.
!Never open the hood ifawindshield wiper
arm has been folded away from the
windshield.
Never foldawindshield wiper arm without
awiper blade back ontothe windshield.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release
the windshield wiper arm withoutawiper
blade and it falls ontothe windshield, the
windshield may be damaged by the force of
the impact.
Mercedes-Benz recommends that you have
the wiper blades changed ataqualified
specialist workshop.
126Windshieldwipers
Light sa nd windshield wipers

Depending on the equipment level of your
vehicle, there aretwo variants of wiperblade;
these are installed and removed in different
ways. Based on the diagrams,checkwhich
system is installed in your vehicle.
Changing the wiper blades (version 1)
Removing the wiper blades
XRemove the SmartKey from the ignition
lock or turn it to position0(KEYLESS-GO).
XFold the wiper arm away from the
windshield until it engages.
XSet the wiper blade at right angles to the
wiper arm.
XRemove the wiper blade from the retaining
pin on the wiper arm in the direction of the
arrow.
Installing the wiper blades
XPush the new wiper blade onto the
retaining pin on the wiper arm in the
opposite direction to the arrow.
Make sure that the wiper blade slides fully
onto the retaining pin on the wiper arm.
XTurn the wiper blade parallel to the wiper
arm.
XFold the wiper arm back onto the
windshield.
Changing the wiper blades (version 2)
Removing the wiper blades
XRemove the SmartKey from the ignition
lock or turn it to position0(KEYLESS-GO).
XFold the wiper arm away from the
windshield until it engages.
XFirmly press release knoband pull the
wiper blade upwards from the wiper arm in
the direction of the arrow.
Installing the wiper blades
XPosition the new wiper blade in the retainer
on the wiper arm and slide it into place in
the opposite direction from the arrow.
The wiper blade audibly engages.
XMake sure that wiper blade is seated
correctly.
XFold the wiper arm back onto the
windshield.
Windshield wipers127
Lights and windshield wipers
Z

Problems with the windshield wipers
ProblemPossible causes/consequences andSolutions
The windshield wipers
are jammed.
Leaves or snow, for example, may be obstructing the windshield
wiper movement.The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the
ignition lock.
or
XSwitch off the engine using the Start/Stop button and open the
driver's door.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.
The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked ataqualified specialist
workshop.
128Windshield wipers
Lights and windshield wipers