Page 339 of 457
338 Practical hints
What to do if …
Text messages
Display messagePossible cause/consequencePossible solution
ABSABS not
available
differential
lockedYou have engaged the differential locks.The ABS switches on again after the
differential locks have been disen-
gaged.
ABS, ESP
inoperative
See
Operator’s
ManualThe ABS has detected a malfunction and
has switched off.
The ESP
®, BAS, EBB and 4-ETS are also
deactivated.
The brake system is still functioning
normally but without the ABS available.
Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Have the system checked at an
authorized Mercedes -Benz Light Truck
Center as soon as possible.
Failure to follow these instructions
increases the risk of accident.
W463.boo Seite 338 Montag, 19 . November 2007 8:41 08
Page 340 of 457
339
Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ESPinoperative
See
Operator’s
ManualThe ESP® has switched off due to a
malfunction or an interruption in the
power supply.
The brake system is still functioning
normally but without the ESP
®, ABS and
BAS available.
If in addition the ABS is malfunctioning,
only partial engine output will be avail-
able.
Continue driving with added caution.
Have the system checked at an
authorized Mercedes -Benz Light Truck
Center as soon as possible.
Failure to follow these instructions
increases the risk of accident.
W463.boo Seite 339 Montag, 19 . November 2007 8:41 08
Page 342 of 457

341
Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Tire pressure
monitor
inoperative
No wheel
sensorsThere are wheels without appropriate wheel sensors
mounted (e.g. winter tires).Have the Advanced TPMS checked at an
authorized Mercedes-Ben
z Light Truck Center.
Have the wheel sensors installed at an
authorized Mercedes-Benz Light Truck Center.
Wheel sensor
missingOne or more sensors malfunction (e.g. battery is
empty).
The respective tire is indicated by - - - instead of the
tire inflation pressure in the multifunction display.Have the Advanced TPMS checked at an
authorized Mercedes-Benz Light Truck Center.
Have the appropriate wheel sensors installed at
an authorized Mercedes-Benz Light Truck Cen-
ter.
One or more wheels without appropriate wheel sen-
sors mounted (e.g. spare tire).
The respective tire is indicated by - - - instead of the
tire inflation pressure in the multifunction display.Have the Advanced TPMS checked at an
authorized Mercedes-Benz Light Truck Center.
Have the appropriate wheel sensors installed at
an authorized Mercedes-Benz Light Truck Cen-
ter.
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.
W463.boo Seite 341 Montag, 19 . November 2007 8:41 08