Page 434 of 585
433 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
DISTRONIC
available again
Distronic* had been deactivated and
is available again.
Activate Distronic* (
page 256).
currently unavailable
See Operator’s Manual
Distronic* is deactivated because
the functionality is impaired by
external interferences, e.g.
high-frequency sources such as toll
stations, speed measuring systems
etc.
Leave the area of the external interference.
Activate the Distronic* again (
page 256),
when the message
DISTRONIC available
again
appears.
Distronic* is deactivated because
the Distronic* sensor has not
sensed any other vehicles or
objects, e.g. road sign or such, for a
long time.
Try to activate Distronic* again
(page 256), when the message
DISTRONIC available again
appears.
Page 435 of 585
434 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
DISTRONIC
currently unavailable
See Operator’s Manual
Distronic* is deactivated because
the Distronic* cover in the
radiator grille is dirty
the functionality is impaired by
heavy precipitation or fog
Clean the Distronic* cover in the radiator
grille (
page 408).
Restart the vehicle.
Distronic* becomes operational again without
the engine being restarted when
dirt on the radiator grille has fallen off while
driving (e.g. slush or snow)
the system recognizes full sensor
availability due to lessening rain or because
the road is drying, for example
the message in the multifunction display
disappears
You can then operate Distronic* as usual again.
Page 439 of 585
438 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
P
Shift to P
You 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 engine
You 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 but-
ton.
Only shift to
Park when
vehicle is stationary
You have tried to shift the auto-
matic transmission into positionP
using the gear selector lever
although the vehicle is still in mo-
tion.
Stop the vehicle.
Apply the parking brake (
page 65).
Page 441 of 585
440 Practical hintsWhat to do if …Display message
Possible
cause/consequence
Possible solution
Front passenger airbag
enabled
See Operator’s Manual
Front passenger front air bag
is activated while driving even
though a child, small
individual, or object below
the system’s weight thresh-
old is on the front passenger
seat, or the front passenger
seat is empty. Objects on the
seat or forces acting on the
seat may make the system
sense supplemental 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 65).
Switch off the ignition (
page 40).
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. objects such as books, briefcases etc. lodged behind or around the
seat, head restraints pushing against roof etc.). The system may recog-
nize such forces as supplemental weight and sense that an occupant on
the front passenger seat is of a greater weight than actually present.
Keep the seat unoccupied, close the front passenger door and switch
on the ignition (
page 40).
(Continued on next page)
Page 442 of 585
441 Practical hints
What to do if …
Display message
Possible
cause/conse-
quence
Possible solutionMonitor the 59indicator lamp on the center console (
page 89) 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 85) 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 85),
the59indicator 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
remains 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.
Page 443 of 585
442 Practical hintsWhat to do if …Display message
Possible cause/conse-
quence
Possible solution
Front passenger airbag
disabled
See Operator’s Manual
Front passenger front air bag is
deactivated while driving even
though an adult or someone
larger than a small individual is
occupying the front passenger
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 65).
Switch off the ignition (
page 40).
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. objects 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 40).
(Continued on next page)
Page 444 of 585
443 Practical hints
What to do if …
Display message
Possible
cause/conse-
quence
Possible solutionMonitor the 59indicator lamp on the center console (
page 89) 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 85) 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 85),
the59indicator 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
remains illuminated with an adult occupant
on the front passenger seat even after per-
forming the above corrective steps, do not
have any passenger use the front passenger
seat until the system has been repaired.
Page 445 of 585
444 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
Check tires
Then restart
Run Flat Indicator
There was a warning message about
a loss in the tire inflation pressure
and the Run Flat Indicator has not
been reactivated yet.
Make sure that the correct tire inflation pressure is set
for each tire.
Then reactivate the Run Flat Indicator (
page 378).
Run Flat Indicator
inoperative
The Run Flat Indicator is malfunction-
ing.
Have the Run Flat Indicator checked by an authorized
Mercedes-Benz Light Truck Center.
Tire pressure
Check tires
The Run Flat Indicator indicates that
the pressure is too low in one or more
tires.
Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic sit-
uation around you.
Check and adjust tire inflation pressure as required
(page 375).
If necessary, replace the wheel (
page 497).
Reactivate the Run Flat Indicator after adjusting the tire
inflation pressure values (
page 378).
Tire pressure
displayed after
driving for
a few minutes
Vehicles with Advanced TPMS*:
The tire inflation pressure is being
checked.
Drive the vehicle for a few minutes.
