Page 457 of 585
456 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
F
Key
not detected
The SmartKey with
KEYLESS-GO* is not recognized
while the engine is running
because
the SmartKey with
KEYLESS-GO* is not in the
vehicle
there is strong
radio-frequency interference
Stop the vehicle in a safe location or as
soon as it is safe to do so.
Apply the parking brake (
page 65).
Search for the SmartKey with
KEYLESS-GO*.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started
again after the engine is stopped.
The SmartKey with
KEYLESS-GO* is momentarily
not recognized.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
Key
not detected
The SmartKey with
KEYLESS-GO* is not recognized
while the ignition is switched on
(page 40) and a door is
opened or closed and the
SmartKey with KEYLESS-GO* is
not in the vehicle.
Search for the SmartKey with
KEYLESS-GO*.
Otherwise the vehicle cannot be locked
nor can the engine be started.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Page 459 of 585
458 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
.
3rd brake lamp
The high mounted brake lamp is
malfunctioning. This message
will only appear if a number of
critical LEDs have stopped work-
ing.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Active headlamps
inoperative
The active Bi-Xenon* headlamps
system is malfunctioning.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Brake lamp
Left
The left brake lamp is malfunc-
tioning. A substitute bulb is
being used.
Replace the bulb as soon as possible
(page 490).
Brake lamp
Right
The right brake lamp is malfunc-
tioning. A substitute bulb is
being used.
Replace the bulb as soon as possible
(page 490).
Display malfunction
Visit workshop
The display for the lamps or the
system is malfunctioning.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Front foglamp
Left
The left front fog lamp is
malfunctioning.
Replace the bulb as soon as possible
(page 488).
Front foglamp
Right
The right front fog lamp is
malfunctioning.
Replace the bulb as soon as possible
(page 488).
Page 466 of 585
465 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
H
Tire pressure
Check tires
The pressure is too low in one or
more tires.
Check and correct tire inflation pressure as
required.
Tire pressure
Caution - tire defect
One or more tires are deflating.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
If necessary, change the wheel.
Caution - tire defect
Vehicles with Advanced TPMS*:
One or more tires are deflating.
The respective tire is shown in the
multifunction display.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
If necessary, change the wheel.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Page 467 of 585
466 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
H
Tire pressure
Check tires
The tire pressure in one or more tires is
already below the minimum value.
Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers.
Check and adjust tire pressure as
required.
If necessary, change the wheel.
Check tires
Vehicles with Advanced TPMS*:
The tire pressure in one or more tires is
already below the minimum value.
The respective tire is shown in the
multifunction display.
Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers.
Check and adjust tire pressure as
required.
If necessary, change the wheel.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 472 of 585
471 Practical hints
Where will I find ...?
Vehicle jackThe vehicle jack is located underneath the
cargo compartment floor.
Storage position
Remove vehicle jack from its storage
compartment (
page 470).
Turn crank handle in the direction of ar-
row as far as it will go.
!
Vehicles with factory-mounted
running-boards*:
Your vehicle is equipped with a scissors-type
jack (located under the cargo compartment
floor) designed for use with factory-mounted
running boards. Only use this jack when jacking
up vehicles with factory-mounted running boards
as otherwise the vehicle’s underbody can be
damaged. See separate instructions for scis-
sors-type jack.
!
To prevent damage, always disengage the
strap of the securing hook and lower the cargo
compartment floor (
page 469) before closing
the tailgate.
Warning!
G
The jack is designed exclusively for jacking
up the vehicle at the jack take-up brackets
built into both sides of the vehicle. To help
avoid personal injury, use the jack only to lift
the vehicle during a wheel change. Never
get beneath the vehicle while it is supported
by the jack. Keep hands and feet away from
the area under the lifted vehicle. Always
firmly set parking brake and block wheels
before raising vehicle with jack.
Do not disengage the parking brake while
the vehicle is raised. Be certain that the jack
is always vertical (plumb line) when in use,
especially on hills. Always try to use the jack
on a level surface.
Make sure that the jack arm is fully seated
in the jack take-up bracket. Always lower
the vehicle onto jackstands of sufficient
capacity before working under the vehicle.
Page 483 of 585
482 Practical hintsReplacing bulbsBulbs
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 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 the following lamps malfunction:
Turn signal lamps
Brake lamps
Parking lamps
Tail lamps
Read and observe the messages in the multi-
function display (
page 458).
Page 484 of 585
483 Practical hints
Replacing bulbs
Front lamps
Rear lamps
Lamp
Type
1
Parking and standing
lamp
W5W
2
Headlamps:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55 W)
3
Headlamps:
Low beam
H7 (55 W)
Bi-Xenon headlamps*:
Low beam
1
1Vehicles with Bi-Xenon* headlamps: Do not re-
place the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
D2S-35 W
4
Additional turn signal
lamp
LED
5
Side marker lamp
WY 5 W
Lamp
Type
6
Turn signal lamp
3457 AK
S-8
(30/2.2 cp
bulb)
7
Front fog lamp
H11 (55 W)
Corner-illuminating
front fog lamp*
H11 (55 W)
Lamp
Type
8
High mounted brake
lamp
LED
9
Brake lamp
P21W
a
Backup lamp
P21W
b
Turn signal lamp
PY 21 W
c
Side marker lamp
P21/4W
d
Tail, parking, standing
lamp, rear fog lamp
(only driver’s side)
P21/4W
e
License plate lamps
C5W
Page 485 of 585
484 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 Light Truck Center.Have the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Light Truck Center:
the additional turn signal lamps in the
exterior rear view mirrors
the high mounted brake lamp
the Bi-Xenon* low beam lamps
the Bi-Xenon high beam flasher spot-
light*
Warning!
G
Bulbs and bulb sockets can be very hot.
Allow the lamp to cool down before chang-
ing 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.
!
Do not replace the LEDs yourself. You could
otherwise damage the LEDs or parts of the vehi-
cle. Only have the LEDs replaced by a qualified
specialist workshop having the necessary skills
and tools for carrying out the work required.
i
Replacing the bulbs for the front lamps is a
technically complex process. For your conve-
nience, we recommend that you have this work
carried out by an authorized Mercedes-Benz
Light Truck Center.
Have the headlamp adjustment checked
regularly.
