Page 398 of 522
397 Practical hints
What to do if …
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may ap-
pear in the multifunction display.
For your convenience the messages are di-
vided into two sections:
Text messages (
page 398)
Symbol messages (
page 411)
Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warning/
indicator lamps, malfunction/warning mes-
sages or the failure of any systems. Driving
characteristics may be impaired.
If you must continue to drive, please do so
with added caution. Visit an authorized
Mercedes-Benz Center as soon as possible.i
Switching on the ignition causes all instru-
ment cluster lamps (except low beam headlamp
indicator lamp, high beam headlamp indicator
lamp, and turn signal indicator lamps unless ac-
tivated) as well as the multifunction display to
come on. Make sure the lamps and multifunction
display are in working order before starting your
journey.
Page 423 of 522
422 Practical hintsWhat to do if …Display symbol
Display message
Possible cause/consequence
Possible solution
.
Active headlamps
inoperative
The active Bi-Xenon* headlamp system is
malfunctioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Active headlamps
Auxiliary bulb on
The active Bi-Xenon* headlamps are mal-
functioning. Another light is being used.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Reverse lamp
left side
The left reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
Reverse lamp
right side
The right reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
Brake-/tail lamp, left
Auxiliary bulb on
The left brake/tail lamp is malfunction-
ing.
This message will only appear if a critical
number of LEDs have stopped working.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Brake-/tail lamp, right
Auxiliary bulb on
The right brake/tail lamp is malfunction-
ing.
This message will only appear if a critical
number of LEDs have stopped working.
Contact an authorized Mercedes-Benz
Center as soon as possible.
3rd brake lamp
The high mounted brake lamp is malfunc-
tioning.
This message will only appear if a critical
number of LEDs have stopped working.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Page 425 of 522
424 Practical hintsWhat to do if …Display symbol
Display message
Possible cause/consequence
Possible solution
.
AUTO-Light
inoperative
The light sensor is malfunctioning. The
headlamps switch on automatically.
In the control system, set lamp operation
to manual mode (
page 138).
Switch on headlamps using the exterior
lamp switch.
Low beam
left side
The left low beam lamp is malfunction-
ing.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Center as soon as possible.
Low beam
right side
The right low beam lamp is malfunc-
tioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Center as soon as possible.
Page 426 of 522
425 Practical hints
What to do if …
Display symbol
Display message
Possible cause/consequence
Possible solution
.
Rear left foglamp
The left rear fog lamp is malfunctioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Rear right foglamp
The right rear fog lamp is malfunction-
ing.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Switch off lights
You have removed the SmartKey from
the starter switch, opened the driver’s
door and left the headlamps on or re-
moved the SmartKey with
KEYLESS-GO* from the vehicle and left
the headlamps on.
Switch off the headlamps.
Tail lamp, left side
Auxiliary bulb on
The left tail lamp is malfunctioning. A
substitute bulb is being used.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp, right side
Auxiliary bulb on
The right tail lamp is malfunctioning. A
substitute bulb is being used.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Cornering lamp
left
The left corner-illuminating front fog
lamp* is malfunctioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Cornering lamp
right
The right corner-illuminating front fog
lamp* is malfunctioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Page 427 of 522
426 Practical hintsWhat to do if …Display symbol
Display message
Possible cause/consequence
Possible solution
.
Rear left turn signal
The left rear turn signal lamp is malfunc-
tioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Rear right turn signal
The right rear turn signal lamp is malfunc-
tioning.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Front left turn signal
The left front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Front right turn signal
The right front turn signal lamp is mal-
functioning.
Replace the bulb as soon as possible.
Left mirror
turn signal
The turn signal in the left exterior rear
view mirror is malfunctioning.
This message will only appear if a critical
number of LEDs have stopped working.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Right mirror
turn signal
The turn signal in the right exterior rear
view mirror is malfunctioning.
This message will only appear if a critical
number of LEDs have stopped working.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Switch off lights
or
remove key
The exterior lamp switch is set toU
and you have forgotten to take out the
SmartKey. The parking lamps remain
switched on.
Switch off the headlamps.
or
Remove the SmartKey from the starter
switch.
Page 444 of 522
443 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. Contact your au-
thorized Mercedes-Benz Center for head-
lamp adjustment.
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
Substitute bulbs will be brought into use
when lamps malfunction. Read and observe mes-
sages in the multifunction display (
page 422).
Page 445 of 522
444 Practical hintsReplacing bulbs
Front lamps
Lamp
Type
1
Additional turn signal
lamp
LED
2
Turn signal lamp
3547 A
(28.5 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 D1S-35W lamp. Do
not replace the Bi-Xenon bulbs yourself. Contact
your authorized Mercedes-Benz Center.
H7 (55 W)
D1S-35 W
4
Side marker lamp
W 5 W
Lamp
Type
5
Halogen headlamp:
High beam/high beam
flasher
Bi-Xenon* headlamp:
High beam flasher
H7 (55 W)
H7 (55 W)
Halogen headlamp:
Parking and standing
lamp
Bi-Xenon* headlamp:
Parking an standing
lamp
W 5 W
Blue Vision
LED
6
Front fog lamp
Corner-illuminating
front fog lamp*
H11 (55 W)
H11 (55 W)
Page 447 of 522
446 Practical hintsReplacing bulbsHave the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Center:
Additional turn signals in the exterior
rear view mirrors
High mounted brake lamp
Bi-Xenon* lamps
Front fog lamps
Rear lamps (except license plate
lamps)
Front side marker lamps
Replacing bulbs for front lamps
1Housing cover for low beam halogen or
Bi-Xenon* headlamp2Bulb socket for high beam head-
lamp/high beam flasher bulb
3Bulb socket for parking and standing
lamp bulb
4Bulb socket for low beam headlamp
bulb (halogen headlamps only)
5Bulb socket for turn signal lamp bulb
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 137).
Open the hood (
page 325).
!
Do not replace the LEDs yourself. You could
otherwise damage the LEDs or parts of the vehi-
cle. Only have the LEDs replaced by an autho-
rized Mercedes-Benz Center.
Warning!
G
Do not remove the cover1 for the
Bi-Xenon* headlamp. Because of high volt-
age in 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.
