2010 MERCEDES-BENZ GL550 bulb

Display messagesPossible causes/consequences and M SolutionsbTurn
Signal
Rear Left
or
Turn
Signal
Rear RightThe left or right rear turn signal lamp is malfunctioning. A
substitute bulb is being used.XReplace the bulb as soon as possible ( Y page 328).bTurn
Signal
Front Left
or
Turn
Signal
Front
RightThe left or right front turn signal lamp is malfunctioning. A
substitute bulb is being used.XReplace the bulb as soon as possible ( Y page 328).bTurn
Signal
Left
Mirror
or
Turn
Signal
Right
MirrorThe turn signal in the left or right exterior rear view mirror is
malfunctioning. This message will only appear if all LEDs have
stopped working.XContact an authorized Mercedes-Benz Center as soon as
possible.
Tires
Display messagesPossible causes/consequences and M SolutionshTire
pressure(s
) Please
CorrectThe tire inflation pressure is too low in at least one tire.
or
The tire inflation pressure of the individual tires differ from
each other significantly.XCheck and correct tire inflation pressure as required
( Y page 237).hTire
Pressure
Caution:
Tire
DefectAt least one tire is deflating.XCarefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers.XIf necessary, change the wheel ( Y page 336).Vehicle status messages in the multifunction display313Practical hintsX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 313Z

Display messagesPossible causes/consequences and M SolutionshTire
Pressure
Check
TiresThe tire inflation pressure in at least one tire is significantly
below the reference value.XCarefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers.XCheck and adjust tire inflation pressure as required.XIf necessary, change the wheel ( Y page 336).GWarning!
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may
lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up
and possibly a fire.
GWarning!
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect
handling and fuel economy, and are more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear
unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are
more likely to become punctured or damaged by road debris, potholes etc.
What to do if …
Lamps in instrument cluster
Notes
If any of the following lamps in the instrument
cluster fails to come on during the bulb self-
check when switching on the ignition, have
the respective bulb checked and replaced if
necessary.
When you switch on the ignition, all lamps
(except low-beam headlamp indicator lamp,
high-beam headlamp indicator lamp, and turn
signal indicator lamps unless activated) in the
instrument cluster come on. If a lamp in the
instrument cluster fails to come on when the
ignition is switched on, have it checked and
replaced if necessary.314What to do if …Practical hints
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Replacing bulbs
Safety notes
Safe vehicle operation depends on proper
exterior lighting and signaling to a large
degree.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. Contact an
authorized Mercedes-Benz Center for
headlamp adjustment.
GWarning!
Bulbs and bulb sockets can be very hot. Allow
the lamp to cool down before changing a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas. A
bulb can explode if you
R touch or move it when hot
R drop the bulb
R scratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.
i Since replacing bulbs is a technically
highly demanding process, we recommend
to have them replaced at an authorized
Mercedes-Benz Center.
i If the headlamps or front fog lamps are
fogged up on the inside as a result of high
humidity, driving the vehicle a distance with
the lights on should clear up the fogging.328Replacing bulbsPractical hints
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Bulbs
You can replace the following bulbs yourself:
Halogen headlampsType:Low-beam lamp: H7 55 W;High-beam lamp/High-beam flasher
lamp: H7 55 W
=Parking and standing lamp: W 5 W?Turn signal lamp: 3457AASide marker lamp: WY 5 WBi-Xenon headlampsType:High-beam flasher lamp/High-beam
flasher spot lamp: H7 55 W
;Parking and standing lamp: W 5 W=Turn signal lamp: 3457A?Side marker lamp: WY 5 WReplacing bulbs329Practical hintsX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 329Z

Rear lampsType:Backup lamp: P 21 W;Rear foglamp (driver’s side only): H 21 WLicense plate lampsType:License plate lamps: C 5 WNotes on bulb replacement
! Do not replace LEDs or bulbs not
described in this section. You could
otherwise damage the LEDs, the bulbs or
parts of the vehicle. Only have the LEDs and
bulbs replaced at an authorized Mercedes-
Benz Center.
ROnly use 12-volt bulbs of the same type and
with the specified watt rating.
RSwitch the lights off before changing a bulb
to prevent short circuits.
RAlways use a clean lint-free cloth when
handling bulbs.
RYour hands should be dry and free of oil and
grease.
RIf the newly installed bulb does not come
on, contact an authorized Mercedes-Benz
Center.
iMercedes-Benz recommends using
Longlife (LL) bulbs.
Replacing bulbs for front lamps
Before you start to replace a bulb for a front
lamp, do the following:
XSwitch off the ignition.XTurn the exterior lamp switch to position
$.
XOpen the hood (Y page 228).330Replacing bulbsPractical hints
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Example illustration: Driver’s side headlamp
:Housing cover for low-beam halogen or Bi-
Xenon headlamp
;Housing cover for high-beam halogen
bulb (high beam and high-beam flasher)
=Bulb socket for parking and standing lamp
bulb
?Bulb socket for front turn signal lamp bulbABulb socket for side marker lamp bulbGWarning!
Do not remove the cover for the Bi-Xenon
headlamp. Because of high voltage in Xenon
lamps, it is dangerous to replace the bulb or
repair the lamp and its components. It is
recommended to have such work done by a
qualified technician.
Low-beam bulb (halogen headlamps
only)
BBulb socket for low-beam headlampXTurn housing cover : counterclockwise
and remove it.
XTurn bulb socket B with the bulb
counterclockwise and remove it.
XPull bulb E out of bulb socket B.
iDo not remove clip D from bulb socket
B.
XGently press the new bulb into bulb socket
B.
XPlace bulb socket B back into the housing
and turn it clockwise until it engages.
XAlign housing cover : and turn it
clockwise until it engages.
High-beam and high-beam flasher bulb
(halogen headlamps only)/high-beam
flasher bulb (Bi-Xenon headlamps only)
CBulb socket for high-beam headlampReplacing bulbs331Practical hintsX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 331Z

XTurn housing cover ; counterclockwise
and remove it.
XTurn bulb socket C with the bulb
counterclockwise and remove it.
XPull the bulb out of bulb socket C.XGently press the new bulb into bulb socket
C.
XPlace bulb socket C back into the housing
and turn it clockwise until it engages.
XAlign housing cover ; and turn it
clockwise until it engages.
Parking and standing lamp bulb,
front turn signal lamp bulb,
side marker lamp bulb
XTurn respective bulb socket =, ? or A
(Y page 331) with the bulb
counterclockwise and remove it.
XPull the bulb out of the bulb socket.XGently press the new bulb into the bulb
socket.
XPlace bulb socket =, ? or A back into
the housing and turn it clockwise until it
engages.
Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following:
XSwitch off the ignition.XTurn the exterior lamp switch to position
$.
Tail lamp unit
To access the tail lamp units, you first have to
remove the cover in the corresponding side
trim panel of the cargo compartment.
XOpen the tailgate.Opening the driver’s side trim panelXTurn lock : counterclockwise by 90°.XRemove cover ;.XRemove everything from storage
compartment ?.
XInsert a suitable object such as a coin into
the slot of lock =.
XTurn lock = counterclockwise by 90°.XRemove storage compartment ?.
Opening the passenger-side trim panel
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XInsert a suitable object such as a coin into
the slot of lock :.
XTurn lock : by 90° in direction of the
arrow.
XRemove cover ;.
Replacing bulbs
Example illustration: LED rear lamp driver’s side
:Backup lamp bulb socket;Rear fog lamp bulb socket (driver’s side
only)
XDepending on which bulb needs to be
replaced, turn the respective bulb socket
counterclockwise.
XPull the bulb socket out of the housing.XBackup lamp bulb :: Gently press onto
the bulb and turn it counterclockwise out
of its bulb socket.
XGently press the new bulb into its bulb
socket and turn it clockwise until it
engages.
XRear fog lamp bulb ;: Pull the bulb out
of its bulb socket.
XGently press the new bulb into its bulb
socket.
XAlign the bulb socket and turn it clockwise.XMake sure the bulb socket is attached
properly.
XClose the respective cover in the cargo
compartment.
XClose the tailgate.License plate lampsXLoosen screws : of lamp cover to be
removed.
XRemove lamp cover ;.XReplace the bulb.XReinstall lamp cover ;.XRetighten screws :.
Adjusting headlamp aim
:V Vertical centerline;H Horizontal mounting height, measured
from the center
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