2007 MERCEDES-BENZ R500 ignition

434 Practical hints
What to do if …
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may
appear in the multifunction display.
For your convenience the messages are
divided into two sections:

Text messages (page 435)

Symbol messages (page 451)
Warning!G
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warn-
ing/indicator lamps, malfunction/warning
messages or the failure of any systems.
Driving characteristics may be impaired.
If you must continue to drive, do so with
added caution. Contact an authorized
Mercedes-Benz Light Truck Center as soon
as possible.
iSwitching on the ignition causes all
instrument cluster lamps (except high beam
headlamp indicator lamp, and turn signal indica-
tor lamps unless activated) as well as the multi-
function display to come on. Make sure the
lamps and multifunction display are in working
order before starting your journey.

443 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
PShift to PYou have started the engine or
switched on the ignition with
KEYLESS-GO* and opened the
driver’s door with the automatic
transmission not set to positionP.Set the automatic transmission to
positionP.
or
Close the driver’s door
Shift to P or N
to start engineYou have attempted to start the
engine with the KEYLESS-GO*
start/stop button while the auto-
matic transmission was set to
positionR orD.Set the automatic transmission to
positionP orN.
Make sure the brake pedal is depressed
when attempting to start the engine with
the KEYLESS-GO* start/stop button.
Only shift to
Park when vehicle
is stationaryYou have tried to shift the transmis-
sion into position P using the gear
selector lever although the vehicle is
still in motion.Stop the vehicle.

445 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
Front passenger airbag
enabled
See Operator’s ManualFront passenger front
air bag is activated
while driving even
though a child, small
individual, or object
below the system’s
weight threshold is on
the front passenger
seat, or the front pas-
senger seat is empty.
Objects on the seat or
forces acting on the
seat may make the
system sense supple-
mental weight.Stop the vehicle in a safe location as soon as possible and check the front passen-
ger seat for the following:
Apply the parking brake (page 66).
Switch off the ignition (page 39).
Remove child and child restraint from front passenger seat and properly secure
the child in rear seat employing the child restraint if necessary.
Remove any other items from on and around the front passenger seat and
make sure the storage bag on the back of the front passenger seat is empty.
Make sure that no objects which apply forces to the seat are present (e.g. ob-
jects such as books, briefcases etc. lodged behind or around the seat, head re-
straints pushing against roof etc.). The system may recognize such forces as
supplemental weight and sense that an occupant on the front passenger seat
is of a heavier weight than actually present.
Keep the seat unoccupied, close the front passenger door and turn on the igni-
tion (
page 39).
(Continued on next page)

446 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
Front passenger airbag
enabled
See Operator’s ManualMonitor the 59indicator lamp on the center console (page 92) and
the multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,

the 59indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 88) has deactivated the air
bag.

the message Front passenger airbag enabled See Operator’s Manual or the
message
Front passenger airbag disabled See Operator’s Manual should
not appear in the multifunction display at any time the seat is unoccupied. Wait
at last 60 seconds for the system to complete the necessary check cycles and
to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again.
Depending on the front passenger classification sensed by the OCS (
page 88),
the 59indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the
system checked as soon as possible by an authorized Mercedes-Benz Light Truck
Center.
Warning!G
If the 59 indicator lamp re-
mains out even after performing the above
corrective steps, do not have any children
12 years old and under and other small individuals use the front passenger seat
until the system has been repaired.

447 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
Front passenger airbag
disabled
See Operator’s ManualFront passenger front
air bag is deactivated
while driving even
though an adult or
someone larger than a
small individual is oc-
cupying the front pas-
senger seat. Forces
acting on the seat may
make the system
sense a decrease in
weight.Stop the vehicle in a safe location as soon as possible and check the front
passenger seat for the following:
Apply the parking brake (page 66).
Switch off the ignition (page 39).
Have the front passenger vacate the seat and exit the vehicle.
Adjust the seat in a height position (page 44).
Make sure that no objects which apply forces to the seat are present (e.g. ob-
jects such as books, briefcases etc. lodged underneath, behind or around the
seat). Such forces may cause the system to sense that an occupant of a lesser
weight than actually present is on the front passenger seat.
Keep the seat unoccupied, close the front passenger door and switch on the
ignition (
page 39).
(Continued on next page)

448 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
Front passenger airbag
disabled
see Operator’s ManualMonitor the 59indicator lamp on the center console (page 92) and
the multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,

the 59indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 88) has deactivated the air
bag.

the message Front passenger airbag enabled see Operator’s Manual or the
message
Front passenger airbag disabled see Operator’s Manual should
not appear in the multifunction display at any time the seat is unoccupied. Wait
at last 60 seconds for the system to complete the necessary check cycles and
to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again.
Depending on the front passenger classification sensed by the OCS (
page 88),
the 59indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the
system checked as soon as possible by an authorized Mercedes-Benz Light Truck
Center.
Warning!G
If the 59indicator lamp re-
mains out even after performing the above
corrective steps, do not have any children
12 years old and under and other small individuals use the front passenger seat
until the system has been repaired.

461 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
FKey
not detectedThe SmartKey with
KEYLESS-GO* is not detected
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.
Apply the parking brake (page 66).
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 detected.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 detectedThe SmartKey with
KEYLESS-GO* is not detected
while the ignition is switched on
(
page 39) 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.

497 Practical hints
Flat tire
Flat tire
Preparing the vehicle
Park the vehicle in a safe distance from
moving traffic on a hard, flat surface
when possible.
Turn on the hazard warning flasher
(
page 152).
Turn the steering wheel so that the
front wheels are in a straight-ahead
position.
Set the parking brake (page 66).
Set the automatic transmission to
position P (
page 197).
Turn off the engine (page 67).
Have any passenger exit the vehicle at
a safe distance from the roadway.
Remove the SmartKey from the starter
switch.Vehicles with KEYLESS-GO*:
Turn off the engine by pressing the
KEYLESS-GO* button once
(
page 67).
Open the driver’s door (this puts
the starter switch in position 0,
same as with the SmartKey re-
moved from the starter switch). The
driver’s door then can be closed
again.
Remove the KEYLESS-GO*
start/stop button from the starter
switch.
Warning!G
The dimensions of the spare wheel are
different from those of the road wheels. As
a result, the vehicle handling characteristics
change when driving with a spare wheel
mounted. Adapt your driving style accord-
ingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted,
ensure proper tire inflation pressure and do
not exceed a vehicle speed of
50 mph (80 km/ h).
Drive to the nearest Mercedes-Benz Light
Truck Center as soon as possible to have the
spare wheel replaced with a regular road
wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Do not switch off the ESP
® with a spare
wheel mounted.
iOpen doors only when conditions are safe to
do so.
iYou can use the power outlets in the cargo
compartment or in the second seat row to
operate the electric air pump even when the
ignition is switched off, e.g. in order to inflate the
collapsible tire (
page 501).
An emergency shut-off feature ensures that the
vehicle’s electrical voltage does not fall below a
minimum level. If the voltage drops to this mini-
mum level, the power outlets are automatically
switched off. This ensures that enough power
remains to start the engine.