2007 MERCEDES-BENZ GL320CDI brake light

453 Practical hints
What to do if …
Text messages
Display messagePossible cause/consequencePossible solution
ABSinoperative
See Operator’s ManualThe ABS has detected a malfunction
and has switched off.
The ESP
® and the BAS are also
deactivated.
The brake system is still functioning
normally but without the ABS avail-
able.
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.
unavailable
See Operator’s ManualThe ABS was deactivated because of
insufficient power supply. The charg-
ing voltage has fallen below 10 volts.
The brake system is still functioning
normally but without the ABS
available.When the voltage is above this value again, the
ABS is operational again and the message in
the multifunction display should disappear.
If the message in the multifunction display
does not disappear:
Have the generator (alternator) and the
battery checked.

454 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ABSunavailable
See Operator’s ManualIf the yellow ESP® warning
lampv flashes while driving and
this message appears, the electron-
ic traction system has switched off
to prevent overheating of the drive
wheel brakes.As soon as the brakes have cooled off,
the electronic traction system switches
on again.
The message in the multifunction dis-
play disappears and the ESP
® warning
lampv goes out.
The self-diagnosis has not yet been
completed yet.The display will clear after driving a
short distance at a vehicle speed of
above 12 mph (20 km/h).
Cruise control and
SPEEDTRONICinoperativeThe cruise control is malfunctioning.Have cruise control checked by an
authorized Mercedes-Benz Light
Truck Center.
Cruise control--- mphYou have attempted to set a speed
while driving below 20 mph
(30 km/h).Accelerate to a speed exceeding
20 mph (30 km/h) and set the
speed (
page 257).
The ESP® is switched off.Switch on the ESP® (page 105).
The automatic transmission is set to
positionP, R, orN.Set the automatic transmission to
positionD (
page 194).
The vehicle is secured with the
parking brake.Release the parking brake
(
page 60).

455 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
DISTRONIC--- mphYou have attempted to set a speed
while driving below 20 mph
(30 km/h).Accelerate to a speed exceeding 20 mph
(30 km/h) and set the speed (
page 262).
The ESP® is switched off.Switch on the ESP® (page 108).
The automatic transmission is set to
positionP, R, orN.Set the automatic transmission to
positionD (
page 194).
The vehicle is secured with the
parking brake.Release the parking brake (page 60).
inoperativeThe Distronic* or the Distronic*
display are malfunctioning.Have the system checked by an authorized
Mercedes-Benz Light Truck Center.
OverrideYou have accelerated. The
Distronic* has switched off.Stop accelerating.

458 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Depress brake
to shift out of
ParkYou have tried to shift the automatic
transmission into positionD,R orN
using the gear selector lever without
depressing the brake pedal.Depress the brake pedal.
Door Open
Vehicle not in ParkYou have opened the driver’s door
and the transmission is still in
positionD,R orN.Before you leave the vehicle, make sure
that the automatic transmission is set to
positionP and that the parking brake is
engaged.
Drive to workshop
without
shifting gearsThe automatic transmission cannot
be shifted out of the set position be-
cause of a malfunction.If the automatic transmission is set to
positionD:
Without changing the automatic transmis-
sion from positionD, drive to an authorized
Mercedes-Benz Light Truck Center.
If the automatic transmission is set to
positionN,R orP:
Do not drive.
Contact an authorized Mercedes-Benz Light
Truck Center.

469 Practical hints
What to do if …
Symbol messages
Display symbolDisplay messagesPossible cause/consequencePossible 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 68).
 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.

470 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
#Battery/Alternator
Stop vehicleThe 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 68).
Do not continue to drive.
Notify an authorized Mercedes-Benz
Light Truck Center.
{inoperativeDownhill Speed Regulation is
malfunctioning.Have the Downhill Speed Regulation
checked by an authorized Mercedes-Benz
Light Truck Center.
2Brake wearThe 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.

471 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
;(USA only)
!(Canada only)
Release
parking brakeYou are driving with the parking
brake set.Release the parking brake (page 60).
;(USA only)
3(Canada only)
EBV, ABS, ESP inoperative
See Operator’s ManualThe EBP, the ABS, and the ESP®
have switched off due to a mal-
function. The BAS is also
switched off.
The brake system is still func-
tional but without the EBP, the
ABS, and the ESP
® 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 an accident.

472 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
;(USA only)
3(Canada only)
Check
brake fluid levelThere is insufficient brake fluid
in the reservoir.Risk of accident! Stop the vehicle in a
safe location or as soon at is safe to do
so.
Apply the parking brake (page 68).
Notify an authorized Mercedes-Benz
Light Truck Center. Do not add brake
fluid! This will not solve the problem.
? (USA only)
± (Canada only)
Engine
ServiceThere may be a malfunction in
the

fuel injection system

ignition system

exhaust system

fuel system
Have the engine checked by an
authorized Mercedes-Benz Light Truck
Center.
Warning!G
Driving with the message Check brake
fluid level
displayed can result in an ac-
cident. Have your brake system checked im-
mediately. Do not add brake fluid before
checking the brake system. Overfilling the
brake fluid reservoir can result in spilling
brake fluid on hot engine parts and the
brake fluid catching fire. You could be seri-
ously burned.!If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.