Page 387 of 506

386 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
. 
Tail lamp right
back-up lamp on
 
The right tail lamp is malfunctioning. A 
back-up bulb is being used.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Turn off lamps!
Lamps have been turned on although the 
SmartKey in the starter switch is in posi-
tion 0.
Turn off the headlamps.
Turn signal,
front left 
The left front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Turn signal,
front right
 
T h e  r i g h t  f r o n t  t u r n  s i g n a l  l a m p  i s  m a l f u n c-
tioning.
Replace the bulb as soon as possible.
Turn signal,
left mirror
The left turn signal in the side mirror is 
malfunctioning. This message will only ap-
pear if all light emitting diodes have 
stopped working.
Have the LEDs replaced as soon as 
possible.
Turn signal,
right mirror
The right turn signal in the side mirror is 
malfunctioning. This message will only ap-
pear if all light emitting diodes have 
stopped working.
Have the LEDs replaced as soon as 
possible.
Turn signal rear left
back-up lamp on
 
The left rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
Turn signal rear right
back-up lamp on
 
The right rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible. 
     
        
        Page 415 of 506

414 Practical hintsReplacing bulbsSafe vehicle operation depends on proper 
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp 
assemblies are in good working order at all 
times.
Correct headlamp adjustment is extremely 
important. Have headlamps checked and 
readjusted at regular intervals and when a 
bulb has been replaced. See an authorized 
Mercedes-Benz Center for headlamp ad-
justment.
Bulbs Front lamps
iIf 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.iBack-up bulbs will be brought into use 
when lamps malfunction. Observe the 
messages in the multifunction display 
(page 383).
Lamp
Type
1
Additional turn signal 
lamp
LED
2
Turn signal lamp
1156 NA
3
Halogen headlamp:
Low beam
Bi-Xenon* headlamp:
Low and high beam
1
1Vehicles with Bi-Xenon headlamps* do not replace
the Bi-Xenon bulbs yourself.
H7 (55 W) 
D2S-35 W
4
Halogen headlamp:
High beam/high beam 
flasher
Bi-Xenon* headlamp:
High beam flasher
H7 (55 W)
H7 (55 W)
Parking and standing 
lamp
W 5 W
5
Front fog lamp
Front fog lamp with 
cornering fog lamp*
HB4 (51 W)
H7 (55 W)
6
Side marker lamp
W 5 W 
     
        
        Page 416 of 506

415 Practical hints
Replacing bulbs
Rear lamps Notes 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 follow-
ing lamps replaced by an authorized 
Mercedes-Benz Center.
Additional turn signal lamps in the 
exterior rear view mirrors
High mounted brake lamp
Bi-Xenon* lamps
Front fog lamps
Lamp
Type
7
High mounted brake 
lamp
LED
8
Brake lamp
P 21 W
9
Turn signal lamp
P 21 W
a
Tail, parking and stand-
ing lamp, side marker
P 21/4 W
W 5 W
b
Backup lamp
P 21 W
c
License plate lamps
C 5 W
d
Rear fog lamp, driver’s 
side
P 21/4 W 
Warning!
G
Keep bulbs out of reach of children.
Bulbs and bulb sockets can be very hot. Al-
low the lamp to cool down before changing 
a bulb.
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.iHave the headlamp adjustment 
checked regularly. 
     
        
        Page 417 of 506
416 Practical hintsReplacing bulbsReplacing 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 122).
Open the hood (
page 305) (except 
for side marker lamps).
Front lamps halogen-type
1Housing cover for low beam headlamp
2Housing cover for high beam head-
lamp, parking and standing lamp3Bulb socket for turn signal lamp bulb
4Bulb holder of low beam bulb
5Bulb holder of high beam bulb
6Bulb socket for parking and standing 
lamp bulbLow beam bulb
Turn housing cover1 counterclock-
wise and remove it.
Turn bulb holder4 with the bulb coun-
terclockwise and remove it.
Pull the bulb at its socket out of bulb 
holder4.
Insert the new bulb so that its socket 
locates in the recess of bulb holder4 
and is level to it.
Reinsert bulb holder4 with the bulb in 
the lamp and turn clockwise.
Align housing cover1 and turn it 
clockwise. 
     
        
        Page 418 of 506

417 Practical hints
Replacing bulbs
High beam bulb
Turn housing cover2 counterclock-
wise and remove it.
Turn bulb holder5 with the bulb coun-
terclockwise and remove it.
Pull the bulb at its socket out of bulb 
holder5.
Insert the new bulb so that its socket 
locates in the recess of bulb holder5 
and is level to it.
Reinsert bulb holder5 with the bulb in 
the lamp and turn clockwise.
Align housing cover2 and turn it 
clockwise.Front turn signal lamp bulb
Turn bulb socket3 counterclockwise 
and remove it.
Press gently onto the bulb and turn 
counterclockwise out of bulb 
socket3.
Press the new bulb gently into bulb 
socket3 and turn clockwise until it 
engages.
Place bulb socket3 back into the 
lamp and turn it clockwise.Parking and standing lamp bulb
Turn housing cover2 counterclock-
wise and remove it.
Pull out bulb socket6 with the bulb.
Pull the bulb out of the bulb socket6.
Press the new bulb into bulb socket6.
Press bulb socket6 back into the 
lamp.
Align housing cover2 and turn it 
clockwise. 
     
        
        Page 419 of 506
418 Practical hintsReplacing bulbsFront lamps Bi-Xenon*-type
1Bulb socket for turn signal lamp
2Housing cover for high beam flasher, 
parking and standing lamp
3Housing cover for Bi-Xenon* headlamp4Bulb holder for high beam flasher bulb
5Bulb socket for parking and standing 
lamp bulbHigh beam bulb for high beam flasher
Turn housing cover2 counterclock-
wise and remove it.
Turn bulb holder4 with the bulb coun-
terclockwise and remove it.
Pull the bulb at its socket out of bulb 
holder4.
Insert the new bulb so that its socket 
locates in the recess of bulb holder4 
and is level to it.
Reinsert bulb holder4 with the bulb in 
the lamp and turn clockwise.
Align housing cover2 and turn it 
clockwise.
Warning!
G
Do not remove the cover 
3
 for the Bi-Xe-
non* headlamp. 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 420 of 506

419 Practical hints
Replacing bulbs
Front turn signal lamp bulb
Turn bulb socket1 counterclockwise 
and remove it.
Press gently onto the bulb and turn 
counterclockwise out of bulb 
socket1.
Press the new bulb gently into bulb 
socket1 and turn clockwise until it 
engages.
Place bulb socket1 back into the 
lamp and turn it clockwise.Parking and standing lamp bulb
Turn housing cover2 counterclock-
wise and remove it.
Pull out bulb socket5 with the bulb.
Pull the bulb out of the bulb socket5.
Press the new bulb into bulb socket5.
Press bulb socket5 back into the 
lamp.
Align housing cover2 and turn it 
clockwise.Side marker lamp bulb
Carefully slide the lamp towards the 
rear in direction of arrows.
Remove front end first.
Turn the bulb socket with the bulb 
counterclockwise and remove it.
Pull the bulb out of the bulb socket.
Insert the new bulb into the bulb 
socket.
Place the bulb socket back into the 
lamp and turn it clockwise.
To reinstall the lamp, set rear end in the 
bumper and let the front end engage. 
     
        
        Page 421 of 506
420 Practical hintsReplacing bulbsReplacing 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 122).
Tail lamp unit
Open trunk lid.
Swing the trim panel covering the cor-
responding rear lights to the side.
1Tab
Press tabs1 together.
Remove the bulb carrier.
Press gently onto the respective bulb 
and turn counterclockwise out of its 
bulb socket.
Press the new bulb gently into its bulb 
socket and turn clockwise until it 
engages.
1Brake lamp
2Turn signal lamp
3Backup lamp
4Standing and side marker lamp
5Rear fog lamp (driver’s side)/tail
Reinstall the bulb carrier.
Let tabs1 engage.
Reinstall trim panel.License plate lamp
1Screws
Loosen both screws1.
Remove the license plate lamp.
Replace the tubular lamp.
Reinstall the license plate lamp.
Retighten the screws1.