MERCEDES-BENZ R500 2006 W251 Owner's Manual

440 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
F
Key
not recognized
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 as soon as it is safe to do
so.

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 recognized
The SmartKey with
KEYLESS-GO* is not recognized
while the ignition is switched on
(page 38) 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.

441 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
F
Key
still in vehicle
A SmartKey with KEYLESS-GO*
left in the vehicle was recog-
nized while trying to lock the ve-
hicle from the outside.

Take the SmartKey with KEYLESS-GO*
out of the vehicle.
Remove key
You have forgotten to remove
the SmartKey.

Remove the SmartKey from the starter
switch.
Replace key
Drive to workshop
There is no additional code avail-
able for SmartKey or SmartKey
with KEYLESS-GO*.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Key
Check battery
The batteries in the SmartKey
with KEYLESS-GO* are dis-
charged.

Replace the batteries (
page 464).
Do not
forget key
This message appears for a
maximum of 60 seconds if the
driver’s door is opened with the
engine shut off and no SmartKey
in the starter switch.
This message is only a reminder.

Insert SmartKey in the starter switch.
or

Take the SmartKey with KEYLESS-GO*
with you when leaving the vehicle.

442 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 all light
emitting diodes have stopped
working.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Brake lamp, left
Substitute bulb on
The left brake lamp is malfunc-
tioning. A substitute bulb is
being used.

Replace the bulb as soon as possible.
Brake lamp, right
Substitute bulb on
The right brake lamp is malfunc-
tioning. A substitute bulb is
being used.

Replace the bulb as soon as possible.
Brake lamp
Drive to workshop
Brake lamp illumination is de-
layed or lamp is permanently on.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Display malfunction
Visit workshop
The display for the lamps or the
system is malfunctioning.

Visit 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.
Front foglamp,
right
The right front fog lamp is
malfunctioning.

Replace the bulb as soon as possible.
Rear fog lamp
The rear fog lamp is malfunction-
ing.

Replace the bulb as soon as possible.

443 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
.
Active headlamp
currently unavailable
The active Bi-Xenon* headlamp
system is malfunctioning.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Active headlamps
Substitute bulb on
The active Bi-Xenon* headlamp
system is malfunctioning.
Another lamp is being used.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Active headlamps
inoperative
The active Bi-Xenon* headlamp
system is malfunctioning.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Active headlamp
s
Display malfunction
The active Bi-Xenon* headlamp
system is malfunctioning.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
High beam,
left
The left high beam lamp is
malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
High beam,
right
The right high beam lamp is
malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.

444 Practical hintsWhat to do if ….
License plate lamp,
left
The left license plate lamp is
malfunctioning.

Replace the bulb as soon as possible.
License plate lamp,
right
The right license plate lamp is
malfunctioning.

Replace the bulb as soon as possible.
Light sensor
Drive to workshop
The lamp sensor is malfunction-
ing. The headlamps do not
switch on automatically.

In the control system, set lamp operation
to manual mode (
page 148).

Switch on headlamps using the exterior
lamp switch (
page 147).

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Low beam,
left
The left low beam lamp is
malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Low beam,
right
The right low beam lamp is
malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Display symbol
Display messages
Possible cause/consequence
Possible solution

445 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
.
Marker lamp
,
front left
The left front side marker lamp is
malfunctioning.

Replace the bulb as soon as possible.
Marker lamp
,
front right
The right front side marker lamp
is malfunctioning.

Replace the bulb as soon as possible.
Parking lamp, front left
Substitute bulb on
The left front parking lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.
Parking lamp, front right

Substitute bulb on
The right front parking lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.
Reverse lamp,
left
The left backup lamp is
malfunctioning.

Replace the bulb as soon as possible.
Reverse lamp,
right
The right backup lamp is
malfunctioning.

Replace the bulb as soon as possible.
Switch off lights
You have removed the SmartKey
from the starter switch and
opened the driver’s door or
removed the SmartKey with
KEYLESS-GO* from the vehicle
and left the headlamps on.

Turn the exterior lamp switch toM
(page 147).

446 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
.
Tail lamp, left
Substitute bulb on
The left tail lamp is malfunction-
ing. A substitute bulb is being
used.

Replace the bulb as soon as possible.
Tail lamp, right
Substitute bulb on
The right tail lamp is malfunc-
tioning. A substitute bulb is
being used.

Replace the bulb as soon as possible.
Turn signal, rear left
Substitute bulb on
The left rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.
Turn signal, rear right
Substitute bulb on
The right rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.
Turn signal, front left
Substitute bulb on
The left front turn signal lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.
Turn signal, front right
Substitute bulb on
The right front turn signal lamp is
malfunctioning. A substitute
bulb is being used.

Replace the bulb as soon as possible.

447 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
.
Turn signal in
mirror, left
The left turn signal in the side
mirror is malfunctioning. This
message will only appear if all
light emitting diodes have
stopped working.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
Turn signal in
mirror, right
The right turn signal in the side
mirror is malfunctioning. This
message will only appear if all
light emitting diodes have
stopped working.

Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.

448 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
H
Rectify
tire pressure
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.

449 Practical hints
What 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 inflation
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 inflation
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. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.