2007 MERCEDES-BENZ GL450 ESP inoperative

473 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
Ï Coolant level
Stop car, switch engine offThe coolant is too hot.
Among other possible causes
(the cooling fan could be
malfunctioning), the poly-V-belt
could be broken.Stop the vehicle in safe location or as
soon as it safe to do so.
Apply the parking brake (page 68).
Turn off the engine.
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. Contact an authorized
Mercedes-Benz Light Truck Center.
If it is intact:
Do not continue to drive the vehicle with
this message displayed. Doing so could
result in serious engine damage that is
not covered by the Mercedes-Benz Limit-
ed Warranty.
(Continued on next page)

481 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. 3rd brake lampThe high mounted brake lamp is
malfunctioning. This message
will only appear if a critical num-
ber of LEDs have stopped work-
ing.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Active headlamps
inoperativeThe active Bi-Xenon* headlamps
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Brake lamp
LeftThe left brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 515).
Brake lamp
RightThe right brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 515).
Display malfunction
Visit workshopThe display for the lamps or the
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Front foglamp
LeftThe left front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 514).
Front foglamp
RightThe right front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 514).

483 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. License plate lamp
LeftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 518).
License plate lamp
RightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 518).
AUTO Light
inoperativeThe light sensor is malfunction-
ing. The headlamps switch on
automatically.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
To switch off the headlamps
(U. S. vehicles only):
In the control system, set lamp operation
to manual mode (
page 146).
Switch off the headlamps using the
exterior lamp switch (
page 145).
Low beam
LeftThe left low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 511).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

487 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
L Tele Aid
inoperativeOne or more main functions of the
Tele Aid system are malfunctioning.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
Tele Aid
batteryThe emergency power battery for the
Tele Aid system is malfunctioning. If the
vehicle battery is also malfunctioning or
drained, Tele Aid will not be operational.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
tFunction
unavailableThis display appears if buttont
ors on the multifunction steering
wheel is pressed and the vehicle is not
equipped with a telephone.
W Top up
washer fluidThe fluid level has dropped to about 1/3 of
total reservoir capacity.Add washer fluid (page 384).
] Clean fuel filterHave the fuel filter checked by an
authorized Mercedes-Benz Light
Truck Center.
» Replace air filterThe air filter is clogged.Have the air filter checked by an
authorized Mercedes-Benz Light
Truck Center.