Page 367 of 464

367 Practical hints
What to do if …
.
Turn signal in
mirror, left
The left turn signal in the side mirror
is malfunctioning. This message will
only appear if a critical number of
LEDs have stopped working.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Turn signal in
mirror, right
The right turn signal in the side mir-
ror is malfunctioning. This message
will only appear if a critical number
of LEDs have stopped working.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Turn signal
,
front left
The left front turn signal is malfunc-
tioning.
Replace the bulb as soon as possible.
Turn signal
,
front right
The right front turn signal is mal-
functioning.
Replace the bulb as soon as possible.
Rear left turn signal
Back-up lamp on
The left rear turn signal is malfunc-
tioning. A backup bulb has been
brought into use.
Replace the bulb as soon as possible.
Rear right turn signal
Back-up lamp on
The right rear turn signal is malfunc-
tioning. A backup bulb has been
brought into use.
Replace the bulb as soon as possible.
Display symbol
Display message
Possible cause
Possible solution
Page 381 of 464

381 Practical hints
Replacing bulbs
Front lamps Rear lamps
Lamp
Type
1
Additional turn signal
lamp
LED
2
Turn signal lamp
PY 21 W
3
Halogen headlamp:
Low beam
Bi-Xenon* headlamp:
Low and high beam
1
1Vehicles with Bi-Xenon* headlamps: Low beam
and high beam use the same D2S-35W lamp. Do
not replace the Bi-Xenon* bulbs yourself. See an
authorized Mercedes-Benz Center.
H7 (55 W)
D2S-35W
4
Front fog lamp
HB4 (51 W)
5
Parking and standing
lamp
W5W
6
Halogen headlamp:
High beam/high beam
flasher
Bi-Xenon* headlamp:
High beam flasher
H7 (55 W)
H7 (55 W)
7
Side marker lamp
W5W
Lamp
Type
8
Rear fog lamp (driver’s
side only)
P21W
9
High mounted brake
lamp
LED
a
Tail, parking, standing,
side marker lamp and
brake lamp
LED
b
License plate lamps
C5W
c
Backup lamp
P21W
d
Turn signal lamp
P21W
iVehicles equipped with cornering fog
lamps*:
Front fog lamps use H7 (55 W) lamps.
Warning!
G
Bulbs and bulb sockets can be very hot. Al-
low 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:
touch or move it when hot
drop the bulb
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.
Page 382 of 464
382 Practical hintsReplacing bulbsNotes on bulb replacement
Only use 12-volt bulbs of the same type
and with the specified watt rating.
Switch lights off before changing a bulb
to prevent short circuits.
Always use a clean lint-free cloth when
handling bulbs.
Your hands should be dry and free of oil
and grease.
If the newly installed bulb does not
come on, visit an authorized
Mercedes-Benz Center.Have the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Center:
Additional turn signal lamps in the
exterior rear view mirrors
Bi-Xenon* lamps
Front fog lamps
High mounted brake lamp
Brake lamps
Front and rear side marker lamps
Parking/standing lamps in the tail
lamp assemblies
Replacing bulbs for front lamps
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 106).
Open the hood (
page 287) (except
for side marker lamps).
iHave the headlamp adjustment
checked regularly.
Page 383 of 464
383 Practical hints
Replacing bulbs
1Housing cover for low beam (halogen
headlamps only)
Housing cover for Bi-Xenon* head-
lamps. Do not remove.
2Bulb socket for turn signal lamp
3Bulb socket for high beam/high beam
flasher lamp
4Bulb socket for parking and standing
light lamp
5Bulb socket for low beam bulb (Halo-
gen headlamps only)Low beam bulb (Halogen headlamps
only)
Turn housing cover1 counterclock-
wise and remove.
Turn bulb socket5 with the bulb
counterclockwise and remove.
Pull the bulb out of bulb socket5.
Press the new bulb into bulb socket5.
Place bulb socket5 back into the
lamp and turn it clockwise.
Reinstall housing cover1.
Warning!
G
Do not remove the cover1 for the Bi-Xe-
non* headlamp. Because of high voltage in
Bi-Xenon lamps, it is dangerous to replace
the bulb or repair the lamp and its compo-
nents. We recommend that you have such
work done by a qualified technician.
Page 384 of 464

384 Practical hintsReplacing bulbsHigh beam/high beam flasher bulb
(Halogen headlamps) / High beam
flasher bulb (Bi-Xenon* headlamps)
Turn bulb socket3 with the bulb
counterclockwise and remove.
Pull the bulb out of bulb socket3.
Press the new bulb into bulb socket3.
Place bulb socket3 back into the
lamp and turn it clockwise.Front turn signal bulb
Turn bulb socket2 with the bulb
counterclockwise and remove.
Press gently onto the bulb and turn it
counterclockwise out of bulb
socket2.
Press the new bulb gently into bulb
socket2 and turn it clockwise.
Place bulb socket2 back into the
lamp and turn it clockwise.
Parking and standing lamp bulb
Turn bulb socket4 with the bulb
counterclockwise and remove.
Pull the bulb out of bulb socket4.
Press the new bulb into bulb socket4.
Place bulb socket4 back into the
lamp and turn it clockwise.
Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 106).
Open the trunk lid (
page 95).
Tail lamp unit
1Bulb socket for rear fog lamp (driver’s
side only)
2Bulb socket for turn signal lamp
3Bulb socket for backup lamp