2007 MERCEDES-BENZ ML320CDI Comand Manual

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)

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.

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)

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.

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.

445 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
Tire pressure monitor
inoperative
The TPMS or Advanced TPMS* is
malfunctioning.

Have the TPMS or Advanced TPMS* checked by an
authorized Mercedes-Benz Light Truck Center.
Tire pressure monitor
inoperative
No wheel sensors
There are wheels without appropriate wheel
sensors mounted (e.g. winter tires).

Have the TPMS or Advanced TPMS* checked by an
authorized Mercedes-Benz Light Truck Center.

Have the wheel sensors installed by an authorized
Mercedes-Benz Light Truck Center.
Tire pressure monitor
Wheel sensor missing
One or more sensors defect (e.g. battery is
empty).
One or more wheels without appropriate
wheel sensors mounted (e.g. spare tire).

Have the TPMS or Advanced TPMS* checked by an
authorized Mercedes-Benz Light Truck Center.

Have the wheel sensors installed by an authorized
Mercedes-Benz Light Truck Center.
Vehicles with Advanced TPMS*:
The tire pressure for the respective tire is shown in
the multifunction display.
Tire pressure monitor
currently
unavailable
The TPMS or Advanced TPMS* is unable to
monitor the tire pressure due to

a nearby radio interference source.


excessive wheel sensor temperatures.

As soon as the causes of the malfunction have been
removed, the TPMS or Advanced TPMS* automati-
cally becomes active again after a few minutes driv-
ing.

446 Practical hintsWhat to do if …Symbol messagesDisplay symbol
Display messages
Possible cause/consequence
Possible solution
#
The battery is no longer charging.
Possible causes:

alternator malfunctioning


broken poly-V-belt
Do not forget that the brake system
requires electrical energy and may be
operating with restricted capability.
Considerably greater brake pedal
force is required and the stopping dis-
tance is increased.

Stop the vehicle in a safe location or as
soon as it is safe to do so.

Apply the parking brake (
page 65).

Check the poly-V-belt.
If it is broken:

Do not continue to drive. Otherwise the
engine will overheat due to an inoperative
water pump which may result in damage
to the engine. Notify an authorized
Mercedes-Benz Light Truck Center.
If it is intact:

Drive immediately to the nearest
authorized Mercedes-Benz Light Truck
Center. Adjust driving to be consistent
with reduced braking responsiveness.

447 Practical hints
What to do if …
Display symbol
Display message
Possible cause/consequence
Possible solution
#
Battery/Alternator
Stop vehicle
The battery is defective.

Stop the vehicle in a safe location or as
soon as it is safe to do so.

Apply the parking brake (
page 65).

Do not continue to drive.

Notify an authorized Mercedes-Benz
Light Truck Center.
y
inoperative
Downhill Speed Regulation is
malfunctioning.

Have the Downhill Speed Regulation
checked by an authorized Mercedes-Benz
Light Truck Center.
2
Brake wear
The brake pads have reached
their wear limit.

Have the brake pads replaced as soon as
possible.
!
Brake pad thickness must be visually in-
spected by a qualified technician at the intervals
specified in the Maintenance Booklet.