Page 396 of 489

395 Practical hints
What to do if …
Left displayRight displayPossible cause/consequencePossible solution
.Tail Lamp
Right
Auxiliary Bulb OnThe right tail lamp is malfunction-
ing. An auxiliary bulb has been 
brought into use.Contact an authorized Mercedes-Benz Center 
as soon as possible.
Turn Signal
Left MirrorThe turn signal in the driver’s side 
exterior rear view mirror is malfunc-
tioning. This message will only ap-
pear if all light emitting diodes have 
stopped working.Contact an authorized Mercedes-Benz Center 
as soon as possible.
Turn Signal
Right MirrorThe turn signal in the passenger 
side exterior rear view mirror is mal-
functioning. This message will only 
appear if all light emitting diodes 
have stopped working.Contact an authorized Mercedes-Benz Center 
as soon as possible.
Lights Are
still OnYou have removed the SmartKey 
from the starter switch and opened 
the driver’s door and left the head-
lamps on or removed the SmartKey 
with KEYLESS-GO* from the vehicle 
and left the headlamps on.Turn the exterior lamp switch toM 
orU.
Turn Signal
Front Left
Auxiliary Bulb OnThe left front turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.Replace the bulb as soon as possible 
(
page 409). 
     
        
        Page 397 of 489

396 Practical hints
What to do if …
Left displayRight displayPossible cause/consequencePossible solution
.Turn Signal
Front Right
Auxiliary Bulb OnThe right front turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.Replace the bulb as soon as possible 
(
page 409).
Turn Signal
Rear Left
Auxiliary Bulb OnThe left rear turn signal lamp is mal-
functioning. An auxiliary bulb has 
been brought into use.Replace the bulb as soon as possible 
(
page 409).
Turn Signal
Rear Right
Auxiliary Bulb OnThe right rear turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.Replace the bulb as soon as possible 
(
page 409).
CRaise
Roll-over BarThe roll bar is malfunctioning. For safety reasons, always have the roll bar raised 
when driving with the retractable hardtop open.
Attempt to raise the roll bar using the roll bar 
button (
page 83).
Have the roll bar checked by an authorized 
Mercedes-Benz Center.
L Tele Aid
InoperativeOne or more main functions of the 
Tele Aid system are malfunctioning.Have the Tele Aid system checked by an 
authorized Mercedes-Benz Center.
tFunction 
UnavailableThis display appears if button t 
or s on the multifunction steer-
ing wheel is pressed and the vehicle 
is not equipped with a telephone. 
     
        
        Page 410 of 489

409 Practical hints
Replacing bulbs
Replacing bulbs
Bulbs
Safe 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 
adjustment.
Warning!G
Bulbs and bulb sockets can be very hot. 
Allow the lamp to cool down before chang-
ing 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.
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.
iAuxiliary bulbs will be brought into use when 
the following lamps malfunction:
Turn signal lamps
Brake lamps
Parking lamps
Tail lamps
Observe the messages in the multifunction 
display (
page 359). 
     
        
        Page 411 of 489
410 Practical hints
Replacing bulbs
Front lamps Rear lamps
LampType
1 Additional turn signalLED
2Turn signal lamp1156 NA
3Low beam1,2
1Vehicles with Bi-Xenon* headlamps: Low beam 
and high beam use the same D2S-35W lamp.
2Vehicles with Bi-Xenon* headlamps: Do not 
replace the Xenon and Bi-Xenon* bulbs yourself. 
Contact an authorized Mercedes-Benz Center.
D2S-35W
4Xenon headlamp:
High beam, high beam 
flasherH7 (55 W)
Bi-Xenon headlamp*:
High beam flasherH7 (55 W)
Parking and standing 
lampW 5 W
5Front fog lamp, 
Corner-illuminating 
front fog lamp*H11 (55 W)
6Side marker lampW 5 W
LampType
7 Rear fog lamp 
(driver’s side only)P 21 W
8 High mounted brake 
lampLED
9 Backup lampP 21 W
a Tail, parking and 
standing lamp, side 
marker lampLED
b Brake lampLED
c License plate lampC 5 W
d Turn signal lampPY 21 W 
     
        
        Page 412 of 489

411 Practical hints
Replacing bulbs
Notes on bulb replacement
Only use 12-volt bulbs of the same type 
and with the specified watt rating. 
Switch the 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:
the additional turn signals in the 
exterior rear view mirrors
the high mounted brake lamp
the brake lamps
the parking lamps and the side marker 
lamps in the tail lamp unit
the rear fog lamps
the low beam (Xenon or Bi-Xenon*) 
lamps
the front fog lamps
the front side marker lamps
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 
position M (
page 131).
Open the hood (page 282).
1Bulb socket for turn signal lamp
2High beam headlamp cover
3Low beam headlamp cover (Xenon or 
Bi-Xenon* lamp). Do not remove.
!Do not replace the LEDs yourself. You could 
otherwise damage the LEDs or parts of the 
vehicle. Only have the LEDs replaced by an 
authorized Mercedes-Benz Center. 
     
        
        Page 413 of 489

412 Practical hints
Replacing bulbs
4High beam bulbs
5Locking mechanism
6Parking and standing lampsFront turn signal bulb
Turn bulb socket 1 (page 411) 
counterclockwise and pull it out.
Push the bulb into socket 1, turn 
socket 1 counterclockwise and 
remove it.
Insert the new bulb in bulb socket 1, 
push and turn bulb socket 1 clock-
wise.
Reinsert bulb socket 1 in lamp hous-
ing and turn bulb socket 1 clockwise.High beam/high beam flasher bulbs
Press ends of headlamp cover tab 
together and remove high beam head-
lamp cover 2 (
page 411).
Pull the electrical connector off.
Turn locking mechanism 5 counter-
clockwise and take out the bulb.
Insert the new bulb so that the base 
locates in the recess on the holder.
Turn locking mechanism 5 clockwise.
Plug the connector onto the bulb.
Align high beam headlamp cover 2 
and click it into place.Warning!G
Do not remove the cover for the Xenon or 
Bi-Xenon* headlamp. Because of high 
voltage in Xenon and Bi-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 414 of 489
413 Practical hints
Replacing bulbs
Parking and standing lamp bulbs
Press ends of headlamp cover tab 
together and remove high beam 
headlamp cover 2.
Pull out bulb socket 6 with the bulb.
Pull the bulb out of bulb socket 6.
Insert a new bulb in bulb socket 6.
Reinstall bulb socket 6.
Align high beam headlamp cover 2 
and click it into place.Additional turn signal lamp bulbs
The additional turn signal lamps in the 
exterior rear view mirrors have LEDs.
If a malfunction occurs or LEDs fail to func-
tion, the entire turn signal unit must be re-
placed. Have the turn signal unit replaced 
by an authorized Mercedes-Benz Center.Front side marker lamp bulbs
Since replacing the side marker lamp bulbs 
is a technically highly demanding process, 
we recommend you have the side marker 
lamp bulbs replaced by an authorized 
Mercedes-Benz Center. 
     
        
        Page 415 of 489
414 Practical hints
Replacing bulbs
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 
position M (
page 131).
Open the trunk (page 114).
Tail lamp unit
1Backup lamp
2Driver’s side: Rear fog lamp
Passenger’s side: Substitute lamp
3Turn signal lamp
Fold the trim to the side and remove it.
Turn the bulb socket counterclockwise 
and pull it out.
Gently push the bulb into the socket, 
turn it counterclockwise and remove it.
Insert the new bulb and reinstall the 
bulb socket. 
The bulb socket should audibly click 
into place.
Reinstall the trim.License plate lamp
1Screws
Loosen both screws 1.
Remove the license plate lamp.
Replace the bulb.
Reinstall the license plate lamp.
Retighten screws 1.