Page 111 of 417

110 Controls in detail
Lighting
For information on how to switch on the 
headlamps and use the turn signals, see 
“Switching on headlamps” (
page 51) 
and “Turn signals” (
page 52).
Exterior lamp switch
The exterior lamp switch is located on the 
dashboard to the left of the steering wheel.MOff
Daytime running lamp mode 
(
page 112)
UAutomatic headlamp mode
Daytime running lamp mode 
(
page 112)
CParking lamps (also tail lamps, 
license plate lamps, side marker 
lamps, instrument panel lamps)
BLow beam headlamps (or high 
beam headlamps when the combi-
nation switch is pushed forward) 
and parking lamps
ˆStanding lamps, right (turn left one 
stop)
‚Standing lamps, left (turn left two 
stops)
‡Indicator lamp for front fog lamps
†Indicator lamp for rear fog lampi
If you drive in countries where vehicles 
drive on the other side of the road than 
the country in which the vehicle is reg-
istered, you must have the headlamps 
modified for symmetrical low beams. 
Relevant information can be obtained 
at your authorized Mercedes-Benz 
Light Truck Center. 
     
        
        Page 112 of 417

111 Controls in detail
Lighting
Manual headlamp mode
The low beam headlamps and the parking 
lamps can be switched on and off with the 
exterior lamp switch.
Automatic headlamp mode
The following lamps switch on and off au-
tomatically depending on the brightness of 
the ambient light:
Low beam headlamps
Tail and parking lamps
License plate lamps
Side marker lamps
Turn the exterior lamp switch to 
positionU.
With the SmartKey in starter switch 
position1 only the parking lamps will 
switch on and off automatically.
When the engine is running, the low 
beam headlamps, the tail and parking 
lamps, the license plate lamps, and the 
side marker lamps will switch on and 
off automatically.
i
With the SmartKey removed from the 
starter switch and the driver’s door 
open, a warning sounds if the parking 
lamps or low beam headlamps are 
switched on.
The message 
TURN OFF LIGHTS! ap-
pears in the multifunction display.
Warning!G
If the exterior lamp switch is set toU,
the headlamps may switch off unexpect-
edly when the system senses bright am-
bient light, for example light from 
oncoming traffic. 
the headlamps will not be automatically 
switched on under foggy conditions. 
To minimize risk to you and to others, 
activate headlamps by turning exterior 
lamp switch to B when driving or 
when traffic and / or ambient lighting 
conditions require you to do so.
In low ambient lighting conditions, only 
switch from position U to B with 
the vehicle at a standstill in a safe loca-
tion. Switching from U to B will 
briefly switch off the headlamps. Doing 
so while driving in low ambient lighting 
conditions may result in an accident.
The automatic headlamp feature is only an 
aid to the driver. The driver is responsible for 
the operation of the vehicle’s lights at all 
times. 
     
        
        Page 114 of 417

113 Controls in detail
Lighting
Locator lighting and night security illu-
mination
The locator lighting and the night security 
illumination are described in the “Control 
system section”, see (
page 139) and 
(
page 140).
Exterior rear view mirror lamps
If the vehicle is centrally unlocked in the 
darkness, the lamps in the exterior rear 
view mirrors come on.
If a door is opened, the lamp on this side 
goes out. If no doors are opened, the 
lamps will switch off:
after a maximum of 40 seconds 
immediately, when you switch on the 
ignition (
page 35)Fog lamps
Front fog lamps
Switch on the low beam headlamps 
(
page 110).
Pull out the exterior lamp switch to first 
stop.
The front fog lamps switch on.
The green indicator lamp‡ in the 
exterior lamp switch comes on 
(
page 110).
Push in the exterior lamp switch.
The front fog lamps switch off.
The green indicator lamp‡ in the 
exterior lamp switch goes out.
Warning!G
In low ambient lighting or foggy conditions, 
only switch from position UtoBwith 
the vehicle at a standstill in a safe location. 
Switching from UtoB will briefly 
switch off the headlamps. Doing so while 
driving in low ambient lighting conditions 
may result in an accident.
i
Fog lamps will operate with the parking 
lamps and/or low beam headlamps on. 
Fog lamps should only be used in con-
junction with low beam headlamps. 
Consult your State or Province Motor 
Vehicle Regulations regarding allow-
able lamp operation.
i
Fog lamps cannot be switched on with 
the exterior lamp switch in 
positionU. For switching on the fog 
lamps, turn the exterior lamp switch to 
positionB first. 
     
        
        Page 115 of 417

114 Controls in detail
Lighting
Rear fog lamp (driver’s side only)
Switch on the front fog lamps 
(
page 113).
Pull out the exterior lamp switch to 
second stop.
The rear fog lamp switches on.
The yellow indicator lamp† in the 
exterior lamp switch comes on 
(
page 110).
Push in the exterior lamp switch to first 
stop.
The rear fog lamp switches off.
The yellow indicator lamp† in the 
exterior lamp switch goes out.
The front fog lamps remain lit.
Combination switch
The combination switch is located on the 
left side of the steering column.
1High beam
2High beam flasherHigh beam
Turn the exterior lamp switch to 
positionB orU (
page 110).
Push the combination switch in direc-
tion of arrow1 to switch on the high 
beam.
The high beam headlamp indicator 
lampA in the instrument cluster 
comes on (
page 24).
Pull the combination switch in direction 
of arrow2 to its original position to 
switch off the high beam.
The high beam headlamp indicator 
lampA in the instrument cluster 
goes out.
High beam flasher
Pull the combination switch briefly in 
direction of arrow2. 
     
        
        Page 140 of 417

139 Controls in detail
Control system
The selection marker is on the current 
setting.
Pressæ orç to select manual 
operation or daytime running lamp 
mode (constant) activated.
With daytime running lamp mode activated 
and the exterior lamp switch in 
positionMorU, the low beam 
headlamps are switched on when the en-
gine is running.In low ambient light conditions the follow-
ing lamps will switch on additionally:
Parking lamps
Tail lamps
License plate lamps
Side marker lamps
For more information on the daytime run-
ning lamp mode, see “Lighting” 
(
page 110).Setting locator lighting
With the locator lighting feature activated 
and the exterior lamp switch in position 
U, the following lamps will switch on 
during darkness when the vehicle is un-
locked with the SmartKey:
Parking lamps
Tail lamps
License plate lamps
Side marker lamps
Front fog lamps
The locator lighting switches off when the 
driver’s door is opened.
If you do not open a door after unlocking 
the vehicle with the SmartKey, the lamps 
will switch off automatically after approxi-
mately 40 seconds.i
For safety reasons, resetting the 
LIGHTING submenu to factory settings 
while driving (
page 132) will not de-
activate the daytime running lamp 
mode.
The following message appears in the 
multifunction display:
LIGHTING – CANNOT BE TOTALLY RESET 
TO FACTORY SETTINGS WHILE DRIVING 
     
        
        Page 141 of 417

140 Controls in detail
Control system
Move the selection marker with 
theæ orç button to the 
LIGHTING submenu.
Press buttonj ork repeatedly 
until you see this message in the dis-
play: 
LOCATOR LIGHTING.
The selection marker is on the current 
setting.
Pressæ orç to switch the loca-
tor lighting function 
ON or OFF.
Turn the exterior lamp switch to 
positionU when exiting the vehicle 
(
page 110).
The locator lighting feature is 
activated.Setting night security illumination 
(Headlamps delayed shut-off)
Use this function to set whether and how 
long you would like the exterior lamps to 
illuminate during darkness after exiting the 
vehicle and all doors closed.
With the delayed shut-off feature activated 
and the exterior lamp switch in 
positionU before the engine is turned 
off, the following lamps will switch on 
when the engine is turned off:
Parking lamps
Tail lamps
License plate lamps
Side marker lamps
Front fog lamps
If after turning off the engine you do not 
open a door or do not close an opened 
door, the lamps will switch off automatical-
ly after approximately 60 seconds.
Move the selection marker with 
theæ orç button to the 
LIGHTING submenu.
Press buttonj ork repeatedly 
until you see this message in the dis-
play: 
HEADLIGHTS DELAYED SHUT-OFF.
The selection marker is on the current 
setting.
Pressæ orç to select the 
desired lamp-on period.
i
You can reactivate this function within 
ten minutes by opening a door. 
     
        
        Page 316 of 417

315 Practical hints
What to do if …
Display symbolDisplay messagePossible causePossible solution
. BRAKE LIGHT, R
CHECK LIGHT!
 
The right brake lamp is malfunctioning.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
FRONT FOGLIGHT, L
CHECK LIGHT!
 
The left front fog lamp is malfunctioning.Replace the bulb as soon as possible.
FRONT FOGLIGHT, R
CHECK LIGHT!
 
The right front fog lamp is malfunctioning.Replace the bulb as soon as possible.
FR. L. PARK. LAMP
CHECK LIGHT!
 
BACK-UP LIGHT ON! 
The left parking lamps are malfunction-
ing. A backup bulb is being used.Replace the bulb as soon as possible.
FR. R. PARK LAMP
CHECK LIGHT!
BACK-UP LIGHT ON!The right parking lamps are malfunction-
ing. A backup bulb is being used.Replace the bulb as soon as possible.
HIGH BEAM, L
CHECK LIGHT!
 
The left high beam lamp is malfunction-
ing.Replace the bulb as soon as possible.
HIGH BEAM, R
CHECK LIGHT!
 
The right high beam lamp is malfunction-
ing.Replace the bulb as soon as possible. 
     
        
        Page 336 of 417
335 Practical hints
Replacing bulbs
Replacing 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 Light Truck Center for 
headlamp adjustment. i
If the headlamps or front fog lamps are 
fogged up on the inside as a result of 
high humidity, driving the vehicle a dis-
tance with the lights on should clear up 
the fogging.
i
Backup bulbs will be brought into use 
when lamps malfunction. Observe the 
messages in the multifunction display 
(
page 298).