Page 363 of 464

363 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
3rd brake light
The high mounted brake 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 lamp / brake lamp 
left
Back-up lamp on
The left tail lamp/brake 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 lamp / brake lamp 
right
Back-up lamp on
The right tail lamp/brake 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.
Brake lamp
Visit workshop
Brake lamp illumination is delayed 
or lamp is permanently on.
Visit an authorized Mercedes-Benz Center 
as soon as possible.
Front foglamp, L
The left front fog lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz Center 
as soon as possible.
Front foglamp, R
The right front foglamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz Center 
as soon as possible. 
     
        
        Page 364 of 464

364 Practical hintsWhat 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 137).
Switch on headlamps using the exterior 
lamp switch (
page 106).
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
Possible solution 
     
        
        Page 365 of 464

365 Practical hints
What to do if …
.
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.
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.
Display symbol
Display message
Possible cause
Possible solution 
     
        
        Page 366 of 464

366 Practical hintsWhat to do if ….
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.
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.
Display symbol
Display message
Possible cause
Possible solution 
     
        
        Page 367 of 464

367 Practical hints
What to do if …
.
Turn signal in
mirror, left
The left turn signal in the side mirror 
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
Possible solution 
     
        
        Page 368 of 464
368 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
<
Seat belt system
Visit workshop
The seat belt system is malfunction-
ing.
Visit an authorized Mercedes-Benz Center 
as soon as possible.
t
Function
Not available
This display appears if buttons 
ort on the multifunction steer-
ing wheel is pressed and the vehicle 
is not equipped with a telephone*.
Ê
Close trunk lid
This message will appear whenever 
the trunk lid is open.
Close the trunk lid.
W
Washer fluid
Top up
The fluid level in the windshield 
washer fluid reservoir has dropped 
below its minimum mark.
Add washer fluid (
page 295). 
     
        
        Page 380 of 464
380 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.
Bulbs
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 363). 
     
        
        Page 432 of 464

432 Technical termsCAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or 
windshield wiping.
Cockpit
All instruments, switches, buttons and 
indicator/warning lamps in the passen-
ger compartment needed for vehicle 
operation and monitoring.
Cold tire inflation pressure
(
page 323)
Collapsible tire
An especially compact spare tire that 
must be inflated with a provided air 
pump before using. It should only be 
used to bring the vehicle to the nearest 
service station.COMAND
(Co
ckpit Man
agement and 
D
ata System)
Information and operating center for 
vehicle sound and communications 
systems, including the radio, 
CD changer and navigation system, as 
well as other optional equipment (e.g. 
telephone).
Control system
The control system is used to call up 
vehicle information and to change 
component settings. Information and 
messages appear in the multifunction 
display. The driver uses the buttons on 
the multifunction steering wheel to 
navigate through the system and to ad-
just settings.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed 
set by the driver.Curb weight
(
page 323)
DOT
(Department o
f Transportation)
(
page 323)
Engine number
The number set by the manufacturer 
and placed on the cylinder block to 
uniquely identify each engine pro-
duced.
Engine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an 
oil can tolerate without becoming thin, 
or the lower the temperature it can tol-
erate without becoming viscous, the 
better the viscosity.
ESP
(Electronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.