2012 MERCEDES-BENZ GLK-Class high beam

The hazard warning lamps automatically
switch on if:
R an air bag is deployed.
R the vehicle is slowed down severely from a
speed of over 45 mph (70 km/h) and comes
to a halt.XTo switch on the hazard warning lamps:
press button :.
All turn signals flash. If you now switch on
a turn 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 are deactivated
automatically if the vehicle returns to a speed
of over 6 mph(10 km/h) after a full
application of the brakes.
i The hazard warning lamps still operate if
the ignition is switched off.
Active light function
The active light function is a system that
moves the headlamps according to the
steering movements of the front wheels. In
this way, relevant areas remain illuminated
while driving. This allows you to recognize
pedestrians, cyclists and animals.
Active: when the lights are switched on.
Cornering light function
The cornering light function improves the
illumination of the road over a wide angle in
the direction you are turning, enabling better
visibility in tight bends, for example. It can
only be activated when the low-beam
headlamps are switched on.
Active: if you are driving at speeds below
25 mph (40 km/h) and switch on the turn
signals or turn the steering wheel.
Not active: if you are driving at speeds above
25 mph (40 km/h) or switch off the turn
signal or turn the steering wheel to the
straight-ahead position.
The cornering light function may remain lit for
a short time, but is automatically switched off
after no more than three minutes.
Headlamps fogged up on the inside
The headlamps may fog up on the inside if
there is high atmospheric humidity.
XDrive with the headlamps switched on.
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 at a qualified
specialist workshop.106Exterior lightingLights and windshield wipers

Never use a bulb which has been dropped.
Such a bulb may break or even explode and
injure you.
Halogen bulbs are pressurized and can
explode when you change them, particularly
if they are very hot. You should therefore wear
eye protection and gloves when you are
changing them.
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/side marker lamp:
WY 5 W;Turn signal lamp: PY 21 W=High-beam headlamp: H7 55 W?Parking lamp/standing lamp: W 5 WALow-beam headlamp: H7 55 W
Bi-Xenon headlamps
:Turn signal lamp/side marker lamp:
WY 5 W;Turn signal lamp: PY 21 W=Cornering lamp: H7 55 W?Parking lamp/standing lamp: W 5 W
Tail lamp with/without LED
:Tail lamp/brake lamp: P 21 W;Turn signal lamp: PY 21 W=Backup lamp: P 21 W or W 16 W 11?Tail lamp/rear fog lamp: P 21 WASide marker lamp: W 3 W11
Vehicles without LED turn signal lamps (W 16 W)/vehicles with LED turn signal lamps (P 21 W).Replacing bulbs109Lights and windshield wipersZ

XTurn housing cover : counter-clockwise
and pull it out.XPull connector ; from bulb ?.XUnclip retaining spring = and fold it down.XPull out bulb ?.XInsert the new bulb.XClip retaining spring = back in.XAttach connector ; to bulb ?.XAttach housing cover : and turn it
clockwise until it engages.XLeft-hand headlamp: fasten the washer
fluid reservoir ( Y page 110).XInstall the headlamp cover ( Y page 110).
High-beam headlamps (halogen
headlamps)
XSwitch off the lights.XOpen the hood.XRemove the headlamp cover (Y page 110).XLeft-hand headlamp: detach the washer
fluid reservoir ( Y page 110).XTurn housing cover : counter-clockwise
and pull it out.XPress the handle of bulb holder ; in the
direction of the arrow until bulb holder ;
is released.XTake out the handle with bulb holder ;.XTake the bulb out of bulb holder ;.XInsert the new bulb into bulb holder ;.
Lug = of the bulb must be pointing
upward.XInsert bulb holder ;.XPush the handle of bulb holder ; in the
opposite direction from the arrow until
holder ; engages.XAlign housing cover : and turn it
clockwise until it engages.XLeft-hand headlamp: fasten the washer
fluid reservoir ( Y page 110).XInstall the headlamp cover ( Y page 110).
Parking lamp/standing lamp
XSwitch off the lights.XOpen the hood.XRemove the headlamp cover (Y page 110).XLeft-hand headlamp: detach the washer
fluid reservoir ( Y page 110).XTurn housing cover : counter-clockwise
and pull it out.XPull out bulb holder ;.Replacing bulbs111Lights and windshield wipersZ

Display messagesPossible causes/consequences and M Solutionsb
Check Rear Left
Turn Signal orCheck
Rear Right Turn
SignalThe rear left-hand or rear right-hand turn signal is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.b
Check Front Left
Turn Signal orCheck
Front Right Turn
SignalThe front left-hand or front right-hand turn signal is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.b
Check Left Mirror
Turn Signal orCheck
Right Mirror Turn
SignalThe turn signal in the left-hand or right-hand exterior mirror is
defective.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.b
Check Center Brake
LampThe high-mounted brake lamp is faulty.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.b
Check Left Tail
and Brake
Lamps orCheck Right
Tail and Brake
LampsThe left or right-hand tail lamp/brake lamp is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.b
Check Left High
Beam orCheck Right
High BeamThe left or right-hand high beam is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 108).
or
XVisit a qualified specialist workshop.Display messages189On-board computer and displaysZ