2005 MERCEDES-BENZ G55AMG Owner's Manual

289 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
-
The yellow ABS indicator lamp
comes on while driving.
The ABS has switched off because charging
voltage has fallen below 10 volts. The battery
may not be charged.

Turn off unnecessary electric con-
sumers.
When the battery voltage is above this
value again, the ABS is operational
again.

Note the messages in the multifunc-
tion display (
page 296).

290 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
;
(USA only)
3
(Canada only)The red brake warning lamp
comes on while driving and you
hear a warning sound.
You are driving with the parking brake set.

Release the parking brake
(page 50).

Also note the messages in the multi-
function display (
page 296).
The red brake warning lamp
comes on while driving.
There is insufficient brake fluid in the reser-
voir.

Risk of accident! Carefully stop the
vehicle and notify an authorized
Mercedes-Benz Light Truck Center.
Do not add brake fluid! This will not
solve the problem.

Also note the messages in the multi-
function display (
page 296).
Warning!
G
Driving with the brake warning lamp illumi-
nated can result in an accident. Have your
brake system checked immediately if the
brake warning lamp stays on.
Do not add brake fluid before checking the
brake system. Overfilling the brake fluid res-
ervoir can result in spilling brake fluid on hot
engine parts and the brake fluid catching
fire. You could be seriously 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.

291 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
;
(USA only)
3
(Canada only)
-
The red brake warning lamp and
the yellow ABS indicator lamp
come on when the engine is run-
ning and you hear a warning
sound for approximately five sec-
onds.
The EBB has detected a malfunction and has
switched off. You should be prepared for your
vehicle to perform differently than normal
when braking.

Continue driving with added caution.

Have the system checked at an autho-
rized Mercedes-Benz Light Truck
Center as soon as possible.

Also note the messages in the multi-
function display (
page 296).
Failure to follow these instructions in-
creases the risk of accidents.

292 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
?
(USA only)
±
(Canada only)
The yellow engine mal-
function indicator lamp
comes on while driving.
There is a malfunction of:

The fuel management system


The ignition system


The emission control system


Systems which impact emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home mode. Serious damage can
occur to the emission system.

Have the vehicle checked as soon as possi-
ble by an authorized Mercedes-Benz Light
Truck Center.
An on-board diagnostic connector is used
by the service station to link the vehicle to
the shop diagnostics system. It allows the
accurate identification of system malfunc-
tions through the readout of diagnostic trou-
ble codes. It is located near the hood lock
release on the upper left of footwell.
A loss of pressure has been detected in the
fuel system. The fuel cap may not be closed
properly or the fuel system may be leaky.

Check the fuel cap (
page 235).
If it is not closed properly:

Close the fuel cap.
If it is closed properly:

Have the fuel system checked by an autho-
rized Mercedes-Benz Light Truck Center.
Your fuel tank is empty.

After refueling start, turn off and restart the
engine three or four times in succession.
The limp-home mode is canceled. You do
not need to have your vehicle checked.

293 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
v
The yellow ESP warning lamp
comes on and remains on while
driving.
You engaged the differential locks. The ABS,
ESP, BAS, EBB and 4-ETS are switched off.

The driving systems will switch on
again after the differential locks have
been disengaged.

Also note the messages in the multi-
function display (
page 296).
The ESP is deactivated.
Risk of accident! Adapt your speed and driv-
ing to the prevailing road conditions.

Turn the ESP back on (
page 87).
If the ESP cannot be turned back on, have
the system checked at an authorized
Mercedes-Benz Light Truck Center as
soon as possible.
The ESP is deactivated because of interrupt-
ed power supply. The ABS may still be opera-
tional. The ESP has to be synchronized.

Note the messages in the multifunc-
tion display (
page 296).
The ESP, ABS, BAS, EBB or 4-ETS has detect-
ed a malfunction. All driving systems are
switched off.
Risk of accident! Adapt your speed and driv-
ing to the prevailing road conditions.

Note the messages in the multifunc-
tion display (
page 296).

294 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
<
The red seat belt telltale illumi-
nates briefly after starting the
engine.
The warning lamp reminds you to fasten seat
belts.

Fasten your seat belt.
The yellow fuel tank reserve warning lamp
illuminates while driving.
The fuel level has gone below the reserve
mark.

Refuel at the next gas station.

Also note the messages in the multi-
function display (
page 296).
The yellow fuel tank reserve warning lamp is
blinking.
The fuel cap is not closed tight.

Check the fuel cap.
1
The red SRS indicator lamp
comes on while driving.
There is a malfunction in the restraint sys-
tems. The airbags or emergency tensioning
device (ETD) could deploy unexpectedly or
fail to activate in an accident.

Drive with added caution to the near-
est authorized Mercedes-Benz Light
Truck Center.
Warning!
G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational.
For your safety, we strongly recommend
that you visit an authorized Mercedes-Benz
Light Truck Center immediately to have the
system checked; otherwise the SRS may not
be activated when needed in an accident.
This could result in serious or fatal injury, or
it might deploy unexpectedly and unneces-
sarily which could also result in an accident
and/or injury to you or to others.

295 Practical hints
What to do if …
Lamp in center consoleProblem
Possible cause
Suggested solution
7
The indicator lamp comes on.
A BabySmart
TM1
child seat is installed on the
front passenger seat. Therefore the passen-
ger front airbag is switched off.
1BabySmart
TM is a trademark of Siemens Automotive Corp.
The system is malfunctioning when there is
no BabySmart
TM child seat installed on the
front passenger seat.

Have the system checked as soon as
possible by an authorized
Mercedes-Benz Light Truck Center.
7
The indicator lamp does not
come on with a BabySmart
TM
child seat properly installed on
the front passenger seat.
The system is malfunctioning.

Make sure there is nothing between
seat cushion and child seat and check
installation of the child seat.

If the light remains out, have the sys-
tem checked as soon as possible by
an authorized Mercedes-Benz Light
Truck Center.
Do not use the BabySmart
TM restraint
to transport children on the front pas-
senger seat until the system has been
repaired.

296 Practical hintsWhat to do if …Vehicle status messages in the multifunction display
Warning and malfunction messages ap-
pear in the multifunction display located in
the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the vehicle status message
memory menu in the control system
(page 131) displays both cleared and
uncleared messages.High-priority messages appear in the mul-
tifunction display in red color.
Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (
page 120) or
buttonj, k, ·, orè on the
steering wheel.
Other messages of high priority and mes-
sages of less immediate priority (regular
display colors) can be cleared from the
multifunction display using the reset but-
ton (
page 25) or buttonj, k,
·, orè on the steering wheel. They
are then stored in the vehicle status mes-
sage memory (
page 131). Remember
that clearing a message will only make the
message disappear. Clearing a message
will not correct the condition that caused
the message to appear.
Warning!
G
All categories of messages contain impor-
tant information which should be taken note
of and, where a malfunction is indicated, ad-
dressed as soon as possible at an autho-
rized Mercedes-Benz Light Truck Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property dam-
age or personal injury.