bulb MERCEDES-BENZ B-CLASS 2012 User Guide

Useful information ..............................
98
Exterior lighting .................................. 98
Interior lighting ................................. 103
Replacing bulbs ................................. 104
Windshield wipers ............................111 97Lights and windshield wipers
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?
| To switch the front interior lighting/
automatic interior lighting control off
A p To switch the right-hand front
reading lamp on/off
B To switch the automatic interior lighting
control on Rear-compartment overhead control panel
:
To switch the reading lamp on/off Interior lighting control
Important 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 2 in the
ignition lock.
The brightness of the ambient lighting may be
set using the on-board computer
(Y page 197).
Automatic interior lighting control X
To switch on: set the switch to center
position B.
X To switch off: set the switch to the |
position.
The interior lighting automatically switches
on if you:
R unlock the 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 198).
Manual interior lighting control
X
To switch the front interior lighting on:
set the switch to the c position.
X To switch the interior lighting off: set the
switch to the |

position or (if the door
is closed) to the center position.
X To switch the interior lighting on/off:
press the u button.
X To switch the reading lamps on/off:
press the p button. Crash-responsive emergency lighting
The interior lighting

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 Lock and then unlock the vehicle using the
key. Replacing bulbs
Important safety notes
Xenon bulbs G
DANGER
Xenon bulbs 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. 104
Replacing bulbs
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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 aspect of
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.
There are bulbs other than the Xenon bulbs
that you cannot replace. Replace only the
bulbs listed (Y page 105). 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.
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 use a lint-
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
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. Halogen headlamps
:
Turn signal lamp:3457
; High-beam headlamp: H7 55 W
= Parking lamp/standing lamp: W 5 W LL
? Low-beam headlamp: H7 55 W Vehicles with Intelligent Light System
:
Cornering lamp: H7 55 W Replacing bulbs
105
Lights and windshield wipers Z
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Tail lamp (halogen headlamps)
:
Tail lamp/turn signal lamp/brake lamp:
P 21 W
; Inoperative
= Side marker lamp: P 21 W
? Rear fog lamp: P 21 W
A Backup lamp: W 16 W Tail lamp (Bi-Xenon headlamps)
:
Turn signal lamp/brake lamp: P 21 W
; Rear fog lamp: H 21 W
= Backup lamp: W 16 W License plate lamp (vehicles with halogen
headlamps)
:
License plate lamp: C 5 W Changing the front bulbs
Removing and installing
the cover in the
front wheel housing You must remove the cover from the front
wheel housing before you can change the
front bulbs.
X
To remove: switch off the lights.
X Turn the front wheels inwards.
X Turn rotary knob : through 90°.
Cover ; is released.
X Push cover ; down.
X To install: push cover ; up.
X Turn rotary knob : through 90°.
Cover ; is locked.106
Replacing bulbs
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Low-beam headlamps (halogen
headlamps)
G
WARNING
These bulbs are pressurized.
They can explode when being changed if:
R they are still hot
R they hit an object when being removed
R they are dropped
There is a risk of injury.
You should wear eye protection and clean
gloves when you are changing a bulb. If
necessary, have bulbs changed at a qualified
specialist workshop. X
Remove the cover in the front wheel
housing ( Y page 106).
X Turn housing cover : counter-clockwise
and pull it out.
X Turn bulb holder ; counter-clockwise
and
pull it out.
X Take the bulb out of bulb holder ;
.
X Insert the new bulb into bulb holder ;.
X Insert bulb holder ;
into the
lamp and turn
it clockwise.
X Align housing cover : and turn it
clockwise until it engages.
X Replace the cover in the front wheel
housing ( Y page 106). High-beam headlamps (halogen
headlamps) G
WARNING
These bulbs are pressurized.
They can explode when being changed if:
R they are still hot
R they hit an object when being removed
R they are dropped
There is a risk of injury.
You should wear eye protection and clean
gloves when you are changing a bulb. If
necessary, have bulbs changed at a qualified
specialist workshop. X
Switch off the lights.
X Open the hood.
X Turn housing cover : counter-clockwise
and pull it out.
X Turn bulb holder ; counter-clockwise
and
pull it out.
X Take the bulb out of bulb holder ;

.
X Insert the new bulb into bulb holder ;.
X Insert bulb holder ;
into the
lamp and turn
it clockwise.
X Align housing cover : and turn it
clockwise until it engages. Replacing bulbs
107
Lights and windshield wipers Z
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Parking lamps/standing lamps
(halogen headlamps)
X
Switch off the lights.
X Open the hood.
X Turn housing cover : counter-clockwise
and pull it out.
X Pull out bulb holder ;.
X Take the bulb out of bulb holder ;.
X Insert the new bulb into bulb holder ;.
X Insert bulb holder ;.
X Align housing cover : and turn it
clockwise until it engages.
Turn signals (halogen headlamps) X
Switch off the lights.
X Open the hood.
X Turn bulb holder : counter-clockwise and
pull it out.
X Take the bulb out of bulb holder :
.X
Insert the new bulb into bulb holder :.
X Insert bulb holder : and turn it clockwise
until it engages.
Cornering light function (Intelligent
Light System) G
WARNING
These bulbs are pressurized.
They can explode when being changed if:
R they are still hot
R they hit an object when being removed
R they are dropped
There is a risk of injury.
You should wear eye protection and clean
gloves when you are changing a bulb. If
necessary, have bulbs changed at a qualified
specialist workshop. X
Switch off the lights.
X Open the hood.
X Turn housing cover : counter-clockwise
and pull it out.
X Turn bulb holder ; counter-clockwise and
pull it out.
X Take the bulb out of bulb holder ;

.
X Insert the new bulb into bulb holder ;.
X Insert bulb holder ;
into the
lamp and turn
it clockwise.
X Align housing cover : and turn it
clockwise until it engages.108
Replacing bulbs
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Changing the rear bulbs
Opening and closing the side trim
panels You must open the side trim panel in the
cargo compartment before you can change
the bulbs in the tail lamps.
Left-hand side trim panel
Right-hand side trim panel
X
To open: turn release knob : 90° in the
direction of the
arrow and remove side trim
panel ;.
X To close: insert side trim panel
;
and turn
release knob : 90° in the opposite
direction to the arrow. Tail lamps Turn signal lamp/tail lamp and brake
lamp
X
Switch off the lights.
X Open the cargo compartment.
X Open the side trim panel ( Y page 109). X
Press retaining lugs : simultaneously in
the direction of

the arrow and pull the bulb
holder out. Bulb holder
:
Tail lamp/brake lamp 3
; Inoperative lamps (vehicles without LEDs)
= Side marker lamp (vehicles without LEDs)
X Lightly press the corresponding bulb into
the holder, turn it counter-clockwise and
remove it from the bulb holder.
X Insert the corresponding new bulb into the
bulb holder and turn it clockwise.
3 Vehicles with LEDs: turn signal/brake light only. Replacing bulbs
109
Lights and windshield wipers Z
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X
Attach the bulb holder and press firmly.
The retaining lugs on the bulb holder
engage audibly.
X Close the side trim panel ( Y page 109).
Backup lamp and rear fog lamp
Due to their location, have the bulbs in the
backup lamp and
rear fog lamp in the tailgate
changed at a qualified specialist workshop.
X Switch off the lights.
X Open the tailgate. X
In recess ? on the inside of the closing
handle, pry off and remove the upper
section of handle =

with a flat and smooth
object, e.g. a screwdriver.
X Pull the lower section of handle : using a
sharp, sudden
movement

to remove it from
the trim and then place it to one side. X
Reach under the right-hand side of trim
B and apply

a gentle jolting force along the
entire length of the trim in order to unclip
it. X
Pull out connector C of the surround
lighting by releasing the latches.
X Place trim B to one side. X
On the side where the bulb is to be
changed, unclip the remaining part of trim
D from the assembly using a sudden,
sharp movements, until bulb holder E is
accessible. X
Remove bulb holder E
using both

sides of
lever F. 110
Replacing bulbs
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Bulb holder
X
Rear fog lamp G: lightly press the
corresponding bulb into holder E, turn it
counter-clockwise and
remove
it from bulb
holder E.
X Insert the new bulb into bulb holder E and
turn it clockwise.
X Backup lamp H: remove the bulb from
bulb holder E

.
X Insert the new bulb into bulb holder E.
X Re-insert bulb holder E until you hear
engage audibly.
X Position trim D and engage it in place by
tapping it with your hand.
X Before beginning the installation, check
that all the metal clips are inserted in the
parts placed to one side: 2 clips ; in the
upper part of handle = and 5 clips A in
trim B.
X If not, remove the missing metal clips from
the metal openings in the tailgate and
insert them in the appropriate places.
X Take trim B and connect plug connector
C to the surround lighting.
i The surround lighting only illuminates
when the tailgate has been shut and
reopened. X
Position trim B and engage it in place by
tapping it
with

your hand, starting from the
outside.
X Clip in the lower section of handle : again.
X Insert and engage the upper section of
handle = into lower section

:.
License plate lamp X
Switch off the lights.
X Open the tailgate.
X Position a screwdriver on lamp lens :
from the outside.
X Lever out lamp lens : and remove it.
X Replace the bulb.
X Insert lamp lens : into the license plate
lamp and press it in until it engages. 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 it is necessary to switch on the windshield
wipers in dry weather conditions, always
use washer fluid when operating the
windshield wipers. Windshield wipers
111
Lights and windshield wipers Z
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This display message will only appear if all LEDs have failed.
Display messages Possible causes/consequences and
M Solutionsb
Check Left
Cornering Light
 or 
Check Right
Cornering Light The left or right-hand cornering light is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. b
Check Left Low
Beam or Check
Right Low Beam The left or right-hand low-beam headlamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. b
Check Rear Left
Turn Signal or 
Check Rear Right
Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. b
Check Front Left
Turn Signal or 
Check Front Right
Turn Signal The front left-hand or front right-hand turn signal is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. b
Check Left Mirror
Turn Signal or 
Check
Right
Mirror
Turn Signal The turn signal in the left-hand or right-hand exterior mirror is
defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. b
Check Center
Brake
Lamp The high-mounted brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 104).
or
X Visit a qualified specialist workshop. Display messages
209On-board computer and displays Z
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