Page 383 of 473

382 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
.
Marker lamp
rear right
The rear right side marker lamp is 
malfunctioning.
Contact an authorized Mercedes-Benz Center 
as soon as possible.
Parking lamp
front left
Auxiliary bulb on
The front left parking or standing 
lamp is malfunctioning. An auxiliary 
bulb has been brought into use.
Replace the bulb as soon as possible 
(page 397).
Parking lamp
front right
Auxiliary bulb on
The front right parking or standing 
lamp is malfunctioning. An auxiliary 
bulb has been brought into use.
Replace the bulb as soon as possible 
(page 397).
Rear foglamp
left
The left rear fog lamp is malfunc-
tioning. 
Contact an authorized Mercedes-Benz Center 
as soon as possible.
Reverse lamp
left
The left backup lamp is malfunc-
tioning.
Replace the bulb as soon as possible 
(page 397).
Reverse lamp
right
The right backup lamp is malfunc-
tioning.
Replace the bulb as soon as possible 
(page 397).
Turn signal
left mirror
The 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. 
     
        
        Page 384 of 473

383 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
.
Turn signal
right mirror
The 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.
Tail lamp
left
Auxiliary bulb on
The left tail lamp is malfunctioning. 
An auxiliary bulb has been brought 
into use.
Contact an authorized Mercedes-Benz Center 
as soon as possible.
Tail lamp
right
Auxiliary bulb on
The 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 off
lights
You have removed the SmartKey 
from the starter switch and opened 
the driver’s door 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 on
The left front turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.
Replace the bulb as soon as possible 
(page 397).
Turn signal
front right
Auxiliary bulb on
The right front turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.
Replace the bulb as soon as possible 
(page 397). 
     
        
        Page 385 of 473

384 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
.
Turn signal
rear left
Auxiliary bulb on
The left rear turn signal lamp is mal-
functioning. An auxiliary bulb has 
been brought into use.
Replace the bulb as soon as possible 
(page 397).
Turn signal
rear right
Auxiliary bulb on
The right rear turn signal lamp is 
malfunctioning. An auxiliary bulb 
has been brought into use.
Replace the bulb as soon as possible 
(page 397).
C
Raise
roll-over bar
The roll bar is malfunctioning. 
For safety reason, 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 81).
Have the roll bar checked by an authorized 
Mercedes-Benz Center.
L 
TeleAid
inoperative
One or more main functions of the 
Tele Aid system are malfunctioning.
Have the Tele Aid system checked by an au-
thorized Mercedes-Benz Center.
t
Function 
unavailable
This 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 398 of 473

397 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 as-
semblies 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.
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.
i
If the headlamps or front fog lamps are 
fogged up on the inside as a result of high humid-
ity, driving the vehicle a distance with the lights 
on should clear up the fogging.
i
Auxiliary 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 dis-
play (page 347). 
     
        
        Page 399 of 473
398 Practical hintsReplacing bulbsFront lamps Rear lamps
Lamp
Type
1 
Additional turn signal
LED
2
Turn signal lamp
1156 NA
3
Low beam
1
1Vehicles with Xenon or Bi-Xenon* headlamps: 
Low beam and high beam use the same D2S-35W 
lamp. Do not replace the Xenon and Bi-Xenon* 
bulbs yourself. Contact an authorized 
Mercedes-Benz Center.
D2S-35 W
4
Xenon headlamp:
High beam, high beam 
flasher
H7 (55 W)
Bi-Xenon headlamp*:
High beam flasher
H7 (55 W)
Parking and standing 
lamp
W 5 W
5
Front fog lamp, Cor-
ner-illuminating front 
fog lamp
H11 (55 W)
6
Side marker lamp
W 5 W
Lamp
Type
7 
Rear fog lamp 
(driver’s side only)
P 21 W
8 
High mounted brake 
lamp
LED
9 
Backup lamp
P 21 W
a 
Tail, parking and 
standing lamp, side 
marker lamp
LED
b 
Brake lamp
LED
c 
License plate lamp
C 5 W
d 
Turn signal lamp
PY 21 W 
     
        
        Page 400 of 473

399 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 exteri-
or 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 posi-
tion M (
page 128).
Open the hood (
page 274).
1Bulb socket for turn signal lamp
2High beam headlamp cover
3Low beam headlamp cover (Xenon or 
Bi-Xenon* lamp). Do not remove.
i
Have the headlamp adjustment checked 
regularly. 
     
        
        Page 401 of 473

400 Practical hintsReplacing bulbs4High beam bulbs
5Locking mechanism
6Parking and standing lampsFront turn signal bulb
Turn bulb socket 1 counterclockwise 
and pull it out.
Push the bulb into socket 1, turn 
socket 1 counterclockwise and re-
move it.
Insert the new bulb in socket 1, push 
and turn bulb socket 1 clockwise.
Reinsert bulb socket 1 in lamp and 
turn bulb socket 1 clockwise.High beam/ high beam flasher bulbs
Press ends of headlamp cover tab to-
gether and remove high beam head-
lamp cover 2.
Pull the electrical connector off.
Turn locking mechanism 5 counter-
clockwise and take out the bulb.
Insert the new bulb so that the base lo-
cates 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 volt-
age in Xenon and Bi-Xenon* lamps, it is dan-
gerous to replace the bulb or repair the lamp 
and its components. We recommend that 
you have such work done by a qualified 
technician. 
     
        
        Page 402 of 473
401 Practical hints
Replacing bulbs
Parking and standing lamp bulbs
Press ends of 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.