MERCEDES-BENZ C-Class SEDAN 2014 W204 Owner's Manual

system no longer detects any 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 X
To activate: activate the Adaptive
Highbeam Assist function using the on-
board computer (Y page 216).
X Turn the light switch to 0004.
X Press the combination switch beyond the
pressure point in the direction of arrow 0002
(Y page 116).
The 0003 indicator 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. The
000Aindicator 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. The 000Aindicator lamp in
the instrument cluster goes out. The 0003
indicator lamp in the multifunction display
remains lit.
X To deactivate: move the combination
switch back to its normal position.
The 0003 indicator lamp in the
multifunction display goes out. Headlamps fogged up on the inside
The headlamps may fog up on the inside if
there is high atmospheric humidity.
X Switch on the lights 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:
X Have the headlamps checked at a qualified
specialist workshop. Exterior lighting
119Lights and windshield wipers Z

Interior lighting
Overview of interior lighting
Front overhead control panel
0002
0001 Switches the rear interio rlighting
on/off
0003 001C Switches the automatic interior
lighting control on/off
0022 0013 Switches the right-hand front
reading lamp on/off
0021 0004 Switches the front interior lighting
on/off
001F 0013 Switches the left-hand front reading
lamp on/off Rear-compartment overhead control panel
0002 0013 Switches the right-hand reading
lamp on/off
0003 0013 Switches 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 position 2in the
ignition lock.
Automatic interior lighting control X
To activate/deactivate: press the001C
button.
When the automatic interior lighting
control is activated, the button is flush with
the overhead control panel.
The interior lighting automatically switches
on if you:
R unloc kthe vehicle
R open a door
R remove the SmartKey from the ignition
lock.
The interior light is activated for a short while
when the SmartKey is removed from the
ignition lock. You can activate this delayed
switch-off using the on-board computer
(Y page 217).
Manual interior lighting control X
To switch the front interior lighting on/
off: press the 0004button.
X To switch the interior lighting on/off:
press the 0001button.
X To switch the reading lamps on/off:
press the 0013button. 120
Interior lightingLights and windshield wipers

Crash-responsive emergency lighting
The interio rlighting is activated automatically
if the vehicle is involved in an accident.
X To switch off the crash-responsive
emergency lighting: press the hazard
warning lamp button.
or
X Loc kand then unlock the vehicle using the
SmartKey. Replacing bulbs
Important safety notes
Xenon bulbs G
DANGER
Xeno nbulbs carry a high voltage. You can get
an electric shock if you remove the cover of
the Xenon bulb and touch the electrical
contacts. There is a risk of fatal injury.
Never touch the parts or the electrical
contacts of the Xenon bulb. Always have work
on the Xenon bulbs carried out at a qualified
specialist workshop.
If your vehicle is equipped with Xenon bulbs,
you can recognize this by the following: the
cone of light from the Xenon bulbs moves
from the top to the bottom and back again
when you start the engine. For this to be
observed, the lights must be switched on
before starting the engine.
Bulbs and lamps are an important aspec tof
vehicle safety .You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Other bulbs G
WARNING
Bulbs, lamps and connectors can get very hot
when operating. If you change a bulb, you
could burn yourself on these components.
There is a risk of injury. Allow these components to cool down before
changing a bulb.
Do not use a bulb that has been dropped or if
its glass tube has been scratched.
The bulb may explode if:
R you touch it
R it is hot
R you drop it
R you scratch it
Only operate bulbs in enclosed lamps
designed for that purpose. Only install spare
bulbs of the same type and the specified
voltage.
Marks on the glass tube reduce the service
life of the bulbs. Do not touch the glass tube
with your bare hands. If necessary, clean the
glass tube when cold with alcohol or spirit and
rub it off with a lint-free cloth.
Protec tbulbs from moisture during
operation .Do not allow bulbs to come into
contact with liquids.
There are bulbs other than the Xenon bulbs
that you cannot replace. Replace only the
bulbs listed (Y page 121). Have the bulbs that
you cannot replace yourself changed at a
qualified specialist workshop.
If you require assistance changing bulbs,
consult a qualified specialist workshop.
If the new bulb still does not light up, consult
a qualified 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. Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb
type can be found in the legend. Replacing bulbs
121Lights and windshiel dwipers Z

Halogen headlamps
0002
Parking lamp/standing lamp: W 5W
0003 High-bea mheadlamp: H7 55 W
0022 Low-beam headlamp: H7 55 W Bi-Xenon headlamps
0002 Cornering lamp: H7 55 W Tail lamp
0002
Backup lamp: P 21 W
0003 Brake lamp: P 21 W
0022 Brake lamp/parking lamp: P 21 W Changing the front bulbs
Low-beam headlamps (halogen
headlamps) X
Switch off the lights.
X Open the hood.
X Turn housing cover 0002counter-clockwise
and pull it out.
X Turn bulb holder 0003counter-clockwise and
pull it out.
X Take the bulb out of bulb holder 0003.
X Inser tthe new bulb into bulb holder 0003.
X Insert bulb holder 0003into the lamp and turn
it clockwise.
X Align housing cover 0002and turn it
clockwise until it engages.
High-beam headlamps (halogen
headlamps) X
Switch off the lights.
X Open the hood. 122
Replacing bulbsLights and windshield wipers

X
Turn housing cover 0002counter-clockwise
and pull it out.
X Turn bulb holder 0003counter-clockwise and
pull it out.
X Take the bulb out of bulb holder 0003.
X Insert the new bulb into bulb holder 0003.
X Insert bulb holder 0003into the lamp and turn
it clockwise.
X Align housing cover 0002and turn it
clockwise until it engages.
Parking lamps/standing lamps
(halogen headlamps) X
Switch off the lights.
X Open the hood.
X Turn housing cover 0002counter-clockwise
and pull it out.
X Pull out bulb holder 0003.
X Take the bulb out of bulb holder 0003.
X Insert the new bulb into bulb holder 0003.
X Insert bulb holder 0003.
X Align housing cover 0002and turn it
clockwise until it engages. Cornering light function (Bi-Xenon
headlamps) X
Switch off the lights.
X Open the hood.
X Turn housing cover 0002counter-clockwise
and pull it out.
X Turn bulb holder 0003counter-clockwise and
pull it out.
X Take the bulb out of bulb holder 0003.
X Insert the new bulb into bulb holder 0003.
X Insert bulb holder 0003into the lamp and turn
it clockwise.
X Align housing cover 0002and turn it
clockwise until it engages. Changing the rear bulbs
Opening and closing the side trim
panels You must open the side trim panel in the trunk
and remove the first-aid kit before you can
change the bulbs in the tail lamps. Replacing bulbs
123Lights and windshield wipers Z

Right-hand side trim panel
Left-hand side trim panel (vehicles with a sound
system)
X
To open: turn rotary catch 000290° in the
direction of the arrow and remove side trim
panel 0003.
X To close: insert side trim panel 0003and turn
rotary catch 000290° in the opposite
direction to the arrow. Left-hand side trim panel (vehicles without a sound
system) X
To open: loosen side trim panel 0002at the
top and fold it down in the direction of the
arrow.
X To close: insert side panel 0002.
Tail lamp X
Switch off the lights.
X Open the trunk.
X Open the side trim panel (Y page 123). X
Remove the tail lamp connector
X Simultaneously press retaining lugs 0002in
the direction of the arrow and slightly pull
out the bulb holder with th ebulbs.
X Remove the connector for LED light
functions from the top of the bulb holder.
X Pull the bulb holder out with the bulbs. 0002
Backup Light
0003 Brake lamp
0022 Parking lamp/brake lamp 124
Replacing bulbsLights and windshield wipers

X
Press the respective bulb 0002,0003or0022 back
and turn it counter-clockwise to remove it
from the bulb holder.
X Inser tthe new bulb into the bulb holder and
turn it clockwise.
X Reinsert the connector for LED light
functions in the bulb holder.
X Insert the bulb holder again and lock it in
place.
X Insert the tail lamp connector.
X Close the side trim panel (Y page 123).Windshield wipers
Switching the windshield wipers on/
off
! Do not operate the windshield wipers
when the windshield is dry, as this could
damage the wiper blades. Moreover, dust
that has collected on the windshield can
scratch the glass if wiping takes place when
the windshield is dry.
! If the windshield wipers leave smears on
the windshield after the vehicle has been
washed in an automatic car wash, wax or
other residues may be the reason for this.
Cleant he windshield using washer fluid
after washing the vehicle in an automatic
car wash. Combination switch
0005
0008 Windshield wiper off
0006 0001 Intermittent wipe, low 5
0007 0002 Intermittent wipe, high 6
000B 0016 Continuous wipe, slow
000C 0010 Continuous wipe, fast
0020 0005 Single wipe/0006 To wipe the
windshield using washer fluid
X Switch on the ignition.
X Turn the combination switch to the
corresponding position.
! Intermittent wiping with rain sensor: due
to optical influences and the windshield
becoming dirty in dry weather conditions,
the windshield wipers may be activated
inadvertently. This could then damage the
windshield wiper blades or scratch the
windshield.
For this reason, you should always switch
off the windshield wipers in dry weather.
In the 0001or0002 position, the appropriate
wiping frequency is set automatically
according to the intensity of the rain. In
the 0002 position, the rain sensor is more
sensitive than in the 0001position, 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
5 Rain sensor set to low sensitivity.
6 Rain sensor set to high sensitivity. Windshield wipers
125Lights and windshield wipers Z

conditions
.Replace the wiper blades twice a
year, ideally in spring and fall. Replacing the wiper blades
Important safety notes G
WARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could
be trapped by the wiper arm. There is a risk
of injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
! Never open the hood if a windshield wiper
arm has been folded away from the
windshield.
Never fold a windshield wiper arm without
a wiper blade back onto the windshield.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release
the windshield wiper arm without a wiper
blade and it falls onto the windshield, the
windshield may be damaged by the force of
the impact.
Mercedes-Benzr ecommends that you have
the wiper blades changed at aqualified
specialist workshop.
! To avoid damaging the wiper blades,
make sure that you touch only the wiper
arm of the wiper.
Changing the windshield wiper blades Removing the wiper blades
X
Remove the SmartKey from the ignition
lock or turn it to position 0(KEYLESS-GO).
X Fold the wiper arm away from the
windshield until it engages. X
Firmly press release knob 0002and pull the
wiper blade upwards from th ewiper arm in
the direction of the arrow.
Installing the wiper blades
X Position the new wiper blade in the retainer
on the wiper arm and slide it into place in
the opposite direction to the arrow.
The wiper blade audibly engages.
X Make sure that wiper blade is seated
correctly.
X Fold the wiper arm back onto the
windshield. 126
Windshield wipersLights and windshield wipers

Problems with the windshield wipers
Problem Possible causes/consequences and
0001 Solutions
The windshield wipers
are jammed. Leaves or snow, for example, may be obstructing the windshield
wiper movement.T
he wiper motor has been deactivated.
X For safety reasons, you should remove the SmartKey from the
ignition lock.
or
X Switch off the engine using the Start/Stop button and open the
driver's door.
X Remove the cause of the obstruction.
X Switch the windshield wipers back on. The windshield wipers
fail completely. The windshield wiper drive is malfunctioning.
X
Select another wiper speed on the combination switch.
X Have the windshield wipers checked at a qualified specialist
workshop. The windshield washer
fluid from the spray
nozzles no longer hits
the center of the
windshield. The spray nozzles are misaligned.
X
Have the spray nozzles adjusted at a qualified specialist
workshop. Windshield wipers
127Lights and windshield wipers Z

128