Page 91 of 416
91 Controls in detail
Locking and unlocking
Seats
Memory function
Lighting
Instrument cluster
Control system
Automatic transmission
Transfer case
Differential locks
Good visibility
Climate control
Power windows
Power tilt/sliding sunroof
Driving systems
Loading
Useful features
Page 95 of 416

95 Controls in detail
Locking and unlocking
Global locking
Press button‹.
With the hood, tailgate and all doors
closed, all turn signal lamps flash three
times. The locking knobs on the doors
move down.
The anti-theft alarm system is armed.
Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp4 blinks
twice.Checking the batteries
Press button‹ orŒ.
Battery check lamp4 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.
!If you can no longer lock or unlock the
vehicle with the SmartKey, then the
batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the
SmartKey (
page 95) and replace
them if necessary (
page 331).
Use the mechanical key to unlock
the driver’s door (
page 325).
Have the vehicle battery and the
battery connections checked by an
authorized Mercedes-Benz Light
Truck Center (
page 351).
Use the mechanical key to lock the
driver’s door and the tailgate
(page 326).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz
Light Truck Center.
!If battery check lamp4 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 331).
You can obtain the required batteries
at any authorized Mercedes-Benz Light
Truck Center.
iIf the batteries are checked within sig-
nal range of the vehicle, pressing the
button‹ orŒ will lock or unlock
the vehicle accordingly.
Page 96 of 416
96 Controls in detailLocking and unlockingLoss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Light Truck
Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary have the mechanical lock
replaced.
Your authorized Mercedes-Benz Light
Truck Center will be glad to supply you
with a replacement.
Opening the doors from the inside
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
1Locking knob
2Inside door handle
iIf the vehicle has previously been
locked from the outside with the
SmartKey, opening a door or the tail-
gate from the inside will trigger the
alarm.
To cancel the alarm do one the follow-
ing:
Press the Œ or ‹ button on
the SmartKey.
Insert the SmartKey in the starter
switch.
Page 110 of 416

110 Controls in detailLightingFor information on how to switch on the
headlamps and use the turn signals, see
“Switching on headlamps” and “Turn sig-
nals” (
page 51).
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, li-
cense 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 lamp
iIf 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 111 of 416

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.
iWith 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. Switching
from
U
to
B
will briefly switch
off the headlamps. Doing so while driv-
ing 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 112 of 416

112 Controls in detailLightingDaytime running lamp mode
Turn exterior lamp switch to
positionM orU.
When the engine is running, the low
beam headlamps are switched on.
In low ambient light conditions, the
following lamps will switch on
additionally:
Tail and parking lamps
License plate lamps
Side marker lamps
For nighttime driving, you should turn the
exterior lamp switch to positionB to
permit activation of the high beam head-
lamps.Canada only:
The daytime running lamp mode is manda-
tory and therefore in a constant mode.
Vehicles with automatic transmission*:
When the engine is running, and you shift
from a driving position to positionN orP,
the low beam headlamps will switch off
with a three-minute delay.
When the engine is running, and you
turn the exterior lamp switch to
positionC, the parking lamps
switch on additionally.
turn the exterior lamp switch to
positionB, the manual headlamp
mode has priority over the daytime run-
ning lamp mode.
The corresponding exterior lamps
switch on (
page 110).USA only:
By default, the daytime running lamp mode
is deactivated. Activate the daytime run-
ning lamp mode using the control system,
see “Setting daytime running lamp mode”
(
page 137).
When the engine is running, and you turn
the exterior lamp switch to
positionCorB, the manual head-
lamp mode has priority over the daytime
running lamp mode.
The corresponding exterior lamps switch
on (page 110).
iWith the daytime running lamp mode
and the exterior lamp switch in
positionM you cannot switch on the
high beam headlamps.
The high beam flasher is available at all
times.
Page 113 of 416

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 138) and
(
page 139).
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
U
to
B
with the vehicle at a standstill. 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.
iFog 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.
iFog 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 114 of 416

114 Controls in detailLightingRear 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.