2003 MERCEDES-BENZ G55AMG warning lights

100 Controls in detailLighting
LightingFor notes on how to switch on the head-
lamps and use the turn signals, see the
“Getting started” section (
page 46).
Exterior lamp switch
The exterior lamp switch is located on the
dashboard to the left of the steering wheel
M
Off
U
Automatic headlamp mode
C
Parking lamps (also side marker
lamps, tail lamps, license plate
lamps, instrument panel lamps)
Canada only: When engine is run-
ning, the low beam is additionally
switched on.
B
Parking lamps plus low beam or
high beam headlamps (combination
switch pushed forward).
ˆ
Standing lamps, right (turn left one
stop)
‚
Standing lamps, left (turn left two
stops)
iIf you remove the key and open the
driver’s door while the parking lamps or
low beam headlamps are switched on,
then

a warning sounds


$
appears in the multifunction
display


the message
SWITCH OFF LIGHTS

appears in the multifunction display
iWith the daytime running lamp mode
activated and the engine running, the
low beam headlamps cannot be
switched off manually.

101 Controls in detail
Lighting
Manual headlamp mode
The low beam headlamps and parking
lamps can be switched on and off with the
exterior lamp switch. For exterior lamp
switch, see above.
Automatic headlamp mode
The parking lamps, low beam headlamps
and license plate lamps switch on and off
automatically depending on the brightness
of the ambient light.
Turn the exterior lamp switch to
U
.
Warning!
G
In automatic headlamp mode, the head-
lamps will not be automatically switched on
under foggy conditions. To minimize risk to
you and to others, activate headlamps by
turning exterior lamp switch to
B
.
The driver is responsible for the operation of
the vehicle’s lights at all times. The automat-
ic headlamp feature is only an aid to the driv-
er. Switch on the vehicle lights manually
when driving or when traffic conditions re-
quire you to do so.
iWith the daytime running lamp mode
activated, the low beam headlamps will
not be switched off automatically.
iFront fog lamps and rear fog lamp can
not be switched on manually with exte-
rior lamp switch in position
U
. To
activate the fog lamps, turn exterior
lamp switch to position
B
.
iIf you drive in countries where vehicles
drive on the other side of the road than
the country where the vehicle is regis-
tered, you must have the headlamps
modified for symmetrical low beams.
Relevant information can be obtained
at your authorized Mercedes-Benz
Light Truck Center.

103 Controls in detail
Lighting
Switching on rear fog lamp
Check that the low beam headlamps
are switched on.

Pull out exterior lamp switch to second
stop.
The yellow indicator lamp
†
in the
lamp switch lights up.
Combination switch
The combination switch is located on the
left side of the steering column.
1High beam
2High beam flasher
Switching on high beams
Turn exterior lamp switch to
position
B
or to
U

(
page 100).

Push the combination switch in
direction1.
The high beam symbol
A
in the
instrument cluster lights up.High beam flasher

Pull the combination switch briefly in
direction2.
Hazard warning flasher
The hazard warning flasher can be activat-
ed with the ignition switched on or off. It is
activated automatically when an airbag is
deployed.
The switch is located on the center con-
sole.
1Hazard warning flasher switch

145 Controls in detail
Differential locks
Switching differential locks on and off
The switch is located in the center console.
1Transfer case (center) differential lock
2Rear axle differential lock
3Front differential lock
4Engagement indicator lamps (yellow)
5Function indicator lamps (red)Switching differential locks on
Transfer case differential lock

Press switch1.
The yellow engagement indicator lamp
for the transfer case differential lock
lights up.
The
v
warning lamp lights up.
When the differential lock engagement
operation has been completed, the red
function indicator lamp lights up.The message
ABS NOT AVAILABLE –
DIFFERENTIAL LOCKED
appears in the
multifunction display.
The
v
and
-
warning lamps in
the instrument cluster come on.
Once the transfer case differential lock
is switched on, you can now, if needed,


switch on rear axle differential
lock2
or


switch on rear axle differential lock
and front differential lock 2 and 3.
iThe differential locks can only be
switched on in the sequence 1, 2, 3.
!To avoid damage to the transfer case
and differential locks:

Engage differential locks only at low
speed (walking speed, not more
than 5 mph)


Do not engage differential locks if
the driving wheels are spinning


Do not engage on paved roads.

146 Controls in detailDifferential locksRear axle differential lock
Press switch2.
The yellow engagement indicator lamp
lights up first, followed by the red func-
tion indicator lamp.
The rear axle differential lock is
switched on.
Front differential lock

Press switch 3.
The yellow engagement indicator lamp
lights up first, followed by the red func-
tion indicator lamp.
The front differential lock is switched
on. Switching differential locks off
There are two different methods to disen-
gage differential locks:


You can switch the differential locks off
in reverse order (3, 2, 1).


To switch off all differential locks at the
same time:
Press switch1.
The yellow engagement indicator
lamps go out first. The red function
indicator lamps go out when the
switching process has been carried
out in the differential.To activate the ESP, BAS and ABS systems,
drive again for three seconds using a con-
stant driving style.
All messages in the multifunction display
disappear. The
v
and
-
warning
lamps in the instrument cluster go out.
iIf the function lamps do not go out
when the differential locks are disen-
gaged, bring vehicle to a stop and then
continue driving. Changing the vehicle
load can help to disengage locks. Warning!
G
Always remember to disengage the differen-
tial locks when returning to drive on paved
roads, see “A few words about differentials
and differential locks” (
page 144).

167 Controls in detail
Driving systems
Warning indicator
Visual signals indicate to the driver the rel-
ative distance between the sensors and an
obstacle. The warning indicator is located
next to the tailgate.Warning indicatorAs your vehicle approaches an object, one
or more segments will light up, depending
on the distance. When the sixth segment
lights, you have reached the minimum dis-
tance.An intermittent acoustic warning will
sound as the fourth segment lights up and
a constant acoustic warning lasting a max-
imum of three seconds will sound for the
sixth segment.
Rear Park Assist malfunction
There is a malfunction in the Rear Park As-
sist system if:


a low warning tone sounds while the
vehicle is reversing
The Rear Park Assist sensors are dirty
or malfunctioning.
Clean the Rear Park Assist system
sensors (
page 234).

Switch on the ignition again.


no segments light up and no warning
sounds
The Rear Park Assist is malfunctioning.
Have the Rear Park Assist system
checked by an authorized
Mercedes-Benz Light Truck Center
as soon as possible.
Malfunction may also be caused by inter-
ference from other radio or ultrasonic sig-
nals.

Check the Rear Park Assist operation
at another location to rule out interfer-
ence from outside radio or ultrasonic
signals.

238 Practical hintsWhat to do if …
What to do if …Lamps in instrument clusterGeneral information:
If a bulb in the instrument cluster fails to
light up during the bulb self-check when turning the SmartKey in starter switch to
position2, have it checked and replaced if
necessary.Problem
Possible cause
Suggested solution
v
The yellow ESP warning lamp
lights up 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 246).
The ESP is deactivated. Risk of accident!
Adapt your speed and driving to the prevail-
ing road conditions.

Turn the ESP back on (
page 78).
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 246).
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 driving to the prevailing road con-
ditions.

Note the messages in the multifunc-
tion display (
page 246).

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

Release the parking brake
(page 44).

Also note the messages in the multi-
function display (
page 246).
The red brake warning lamp
lights up 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 246).
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.
Don’t 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 can 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.