Page 363 of 481

362 Practical hintsWhat to do if …Lamps in instrument clusterGeneral information:
If any of the following lamps in the instru-
ment cluster fails to come on during thebulb self-check when switching on ignition
(
page 36), have the respective bulb
checked and replaced if necessary.
Problem
Possible cause/consequence
Suggested solution
-
The yellow ABS indicator lamp comes on
while driving.
The ABS has detected a malfunction
and has switched off. The BAS and
ESP
® are also switched off (see mes-
sages in display).
The brake system is still functioning
normally but without the ABS avail-
able.
If the ABS control unit is malfunction-
ing, other systems such as the
automatic transmission* may also be
malfunctioning.
Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Read and observe messages in the
multifunction display (
page 368).
Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
The charging voltage has fallen below
10 volts and the ABS has switched
off.
The battery might not be charged suf-
ficiently.
Switch off electrical consumers that
are currently not needed, e.g. seat
heating*.
If necessary, have the generator and
battery checked.
When the voltage is above this value
again, the ABS is operational again.
Page 384 of 481

383 Practical hints
What to do if …
.
Rear foglamp
Back-up lamp on
The rear fog lamp on the driver’s
side is malfunctioning. A backup
bulb has been brought into use.
Replace the bulb as soon as possible.
High beam, left
The left high beam lamp (halogen
headlamps)/high beam flasher
lamp (Bi-Xenon* headlamps) is mal-
functioning.
Replace the bulb as soon as possible.
High beam, right
The right high beam lamp (halogen
headlamps)/high beam flasher
lamp (Bi-Xenon* headlamps) is mal-
functioning.
Replace the bulb as soon as possible.
Lamp sensor
Drive to workshop
The light sensor is malfunctioning.
The headlamps switch on automati-
cally.
In the control system, set lamp operation to
manual (
page 143).
Switch on headlamps using the exterior
lamp switch (
page 110).
Visit an authorized Mercedes-Benz Center
as soon as possible.
Left license plate
lamp malfunction
The left license plate lamp is mal-
functioning.
Replace the bulb as soon as possible.
Right license plate
lamp malfunction
The right license plate lamp is mal-
functioning.
Replace the bulb as soon as possible.
Display symbol
Display message
Possible cause/consequence
Possible solution
Page 385 of 481

384 Practical hintsWhat to do if ….
Left reverse
lamp malfunction
The left backup lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Right reverse
lamp malfunction
The right backup lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Low beam, left
The left low beam lamp is malfunc-
tioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Visit an authorized Mercedes-Benz Center
as soon as possible.
Low beam, right
The right low beam lamp is malfunc-
tioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Visit an authorized Mercedes-Benz Center
as soon as possible.
Park. light,
front left
The left front parking lamp is mal-
functioning.
Replace the bulb as soon as possible.
Park. light,
front right
The right front parking lamp is mal-
functioning.
Replace the bulb as soon as possible.
Remove key
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the starter
switch.
Display symbol
Display message
Possible cause/consequence
Possible solution
Page 386 of 481

385 Practical hints
What to do if …
.
Side marker lamp,
front left
The left front side marker lamp is
malfunctioning.
Replace the bulb as soon as possible.
Side marker lamp,
front right
The right front side marker lamp is
malfunctioning.
Replace the bulb as soon as possible.
Rear left side marker
lamp malfunction
The left rear side marker lamp 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.
Rear right side marker
lamp malfunction
The right rear side marker lamp 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.
Tail light, left
Back-up lamp on
The left tail lamp is malfunctioning.
This message will only appear if a
critical number of LEDs have
stopped working. A backup bulb
has been brought into use.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Tail light, right
Back-up lamp on
The right tail lamp is malfunction-
ing. This message will only appear if
a critical number of LEDs have
stopped working. A backup bulb
has been brought into use.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Display symbol
Display message
Possible cause/consequence
Possible solution
Page 387 of 481

386 Practical hintsWhat to do if ….
Turn off
lights
You have forgotten to switch off the
headlamps when exiting the vehicle
and no SmartKey is in the starter
switch.
Switch off the headlamps.
Turn signal in
mirror, left
T h e l e f t t u r n s i g n a l i n t h e s i d e m i r r o r
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/consequence
Possible solution
Page 401 of 481
400 Practical hintsReplacing bulbsSafe 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.
iIf the headlamps are fogged up on the
inside as a result of high humidity,
driving the vehicle a short distance with
the lights on should clear up the
fogging.
iBackup bulbs will be brought into use
when lamps malfunction. Observe the
messages in the multifunction display
(page 382).
Page 402 of 481
401 Practical hints
Replacing bulbs
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
H7 (55 W)
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.
D2S-35W
4
Front fog lamp
HB4 (51 W)
5
Parking and standing
lamp
W5W
6
Halogen headlamp:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon* headlamp:
High beam flasher
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
PY 21 W
iVehicles equipped with
corner-illuminating front fog lamps*:
Front fog lamps use H7 (55 W) lamps.
Page 403 of 481

402 Practical hintsReplacing bulbs
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 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
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.
iHave the headlamp adjustment
checked regularly.