2007 MERCEDES-BENZ G55AMG engine

39 Getting started
Unlocking
Press unlock button Πon the
SmartKey.

All turn signal lamps flash once.

The locking knobs in the doors
move up.

The anti-theft alarm system is
disarmed.

The locator lighting comes on if the
feature is enabled in the control
system (
page 152).
Enter the vehicle and insert the
SmartKey in the starter switch.
For more information, see “Locking and
unlocking” (
page 100).
Starter switch positions
SmartKey
Starter switch
0For removing SmartKey
The steering is locked when the
SmartKey is removed from the starter
switch.
1Power supply for some electrical
consumers, such as seat adjustment
2Ignition (power supply for all electrical
consumers) and driving position
All lamps (except high beam headlamp
indicator lamp and turn signal indicator
lamps unless activated) in the instru-
ment cluster come on. If a lamp in the
instrument cluster fails to come on
when the ignition is switched on, have
it checked and replaced if necessary. If
a lamp in the instrument cluster
remains on after starting the engine or
comes on while driving, refer to “Lamps
in instrument cluster” (
page 324).
3Starting position
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. A child’s
unsupervised access to a vehicle could
result in an accident and/or serious
personal injury.

40 Getting started
Unlocking
For information on starting the engine, see
(
page 54).
iWhen you switch on the ignition, the indica-
tor and warning lamps (except high beam head-
lamp indicator lamp and turn signal indicator
lamps unless activated) in the instrument cluster
come on. The indicator and warning lamps
(except high beam headlamp indicator lamp and
turn signal indicator lamps if activated) will go
out when the engine is running. This indicates
that the respective systems are operational.
iThe SmartKey can only be removed from the
starter switch with the gear selector lever in park
positionP.
iIf the SmartKey is left in starter switch
position0 for an extended period of time, it can
no longer be turned in the switch. In this case,
the steering is locked. To unlock, remove
SmartKey from the starter switch and reinsert.
!If the SmartKey cannot be turned in the
starter switch, the battery may not be
sufficiently charged.

Check the battery and charge it if necessary
(
page 398).

Get a jump start (page 399).
To prevent accelerated vehicle battery discharge
or a completely discharged vehicle battery,
always remove the SmartKey from the starter
switch when the engine is not in operation.

54 Getting started
Driving
Starting the engine Automatic transmission
Gearshift pattern for automatic
transmission
PPark position with gear selector lever
lock
RReverse gear
NNeutral position
DDrive position
For more information, see “Automatic
transmission” (
page 162).Starting
Make sure the gear selector lever is set
to park positionP.
Do not depress the accelerator.
Turn the SmartKey in the starter switch
to position3 (
page 39) and release it
again immediately. The engine starts
automatically.
For information on turning off the engine,
see “Turning off engine” (
page 64).
Starting difficulties
If the SmartKey is left in starter switch
position0 for an extended period of time,
it can no longer be turned in the switch. In
this case, the steering is locked.
To unlock, remove the SmartKey from
the starter switch and reinsert.
If the engine does not start as described,
carry out the following steps:
Turn the SmartKey in the starter switch
to position0 and repeat the starting
procedure.
Warning!G
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness and possible death.
Do not run the engine in confined areas
(such as garage) which are not properly
ventilated. If you think that exhaust gas
fumes are entering the vehicle while driving,
have the cause determined and corrected
immediately. If you must drive under these
conditions, drive only with at least one
window fully open.

55 Getting started
Driving
Remember that extended starting
attempts can drain the battery.
Get a jump start (page 399).
If the engine does not start after several
starting attempts, there could be a mal-
function in the engine electronics or in the
fuel supply system.
Contact an authorized Mercedes-Benz
Light Truck Center or call Roadside
Assistance.
Parking brake1Parking brake lever
2Release buttonPull up slightly on parking brake
lever1 and press release button2.
Push parking brake lever1 down to
its original position.
The brake warning lamp;
(USA only) or3 (Canada only) in
the instrument cluster goes out.
Driving off
Depress the brake pedal.
The gear selector lever lock is released.
Move the gear selector lever to drive
positionD or reverse gearR.
Release the brake pedal.
Carefully depress the accelerator.
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Children
could release the parking brake, which
could result in an accident and/or serious
personal injury.
!In order to avoid damage to the transmis-
sion:

Wait for the gear selection process to com-
plete before setting the vehicle in motion.

Place the gear selector lever in park
positionP or reverse gearR only when the
vehicle is stopped.
!If you hear a warning signal and the
message
Release parking brake appears in
the multifunction display when driving off, you
have forgotten to release the parking brake.
Release the parking brake (
page 55).

56 Getting started
Driving
After a cold start, the transmission shifts at
a higher engine revolution. This allows the
catalytic converter to reach its operating
temperature earlier.
For more information, see “Driving instruc-
tions” (
page 245).
For information on off-road driving, see
“Off-road driving” (
page 253).
Switching on headlamps
Low beam headlamps
The exterior lamp switch is located on the
dashboard to the left of the steering wheel.
Exterior lamp switch
1Off
2Low beam headlamps on
Turn the exterior lamp switch to
positionB.
The low beam headlamp indicator
lampB in the instrument cluster
comes on (
page 26).
iOnce the vehicle is in motion, the automatic
central locking system engages and the locking
knobs drop down.
The automatic door lock feature can be deacti-
vated (
page 155).
You can open a locked door from the inside.
Open door only when conditions are safe to do
so.
Warning!G
On slippery road surfaces, never downshift
in order to obtain braking action. This could
result in drive wheel slip and reduced vehi-
cle control. Your vehicle’s ABS will not pre-
vent this type of loss of control.
Warning!G
It is dangerous to shift the gear selector
lever out ofP or N if the engine speed is
higher than idle speed. If your foot is not
firmly on the brake pedal, the vehicle could
accelerate quickly forward or in reverse. You
could lose control of the vehicle and hit
someone or something. Only shift into gear
when the engine is idling normally and when
your right foot is firmly on the brake pedal.
!Do not run cold engine at high engine speed.
Running a cold engine at high engine speed may
shorten the service life of the engine.
!Simultaneously depressing the accelerator
pedal and applying the brakes reduces engine
performance and causes premature brake and
drivetrain wear.

58 Getting started
Driving
Windshield wipers
The combination switch is located on the
left of the steering column.
Combination switch
1Single wipe
Wiping with windshield washer fluid
2Switching on windshield wipers
Switch on the ignition (page 39).Switching on windshield wipers
Turn the combination switch to the
desired position depending on the
intensity of the rain.
0Windshield wipers off
IIntermittent wiping
IINormal wiper speed
IIIFast wiper speed
!Do not operate the windshield wipers when
the windshield is dry. Dust that accumulates on
a windshield might scratch the glass and/or
damage the wiper blades when wiping occurs on
a dry windshield. If it is necessary to operate the
windshield wipers in dry weather conditions,
always operate the windshield wipers with
windshield washer fluid (
page 59).
!If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off
immediately.

For safety reasons, stop the vehicle in a safe
location, turn off the engine and remove the
SmartKey from the starter switch before
attempting to remove any blockage.

Remove blockage.

Turn the windshield wipers on again.
If the windshield wipers fail to function at all with
the combination switch in positionI,

set the combination switch to the next
higher wiper speed

have the windshield wipers checked at the
nearest authorized Mercedes-Benz Light
Truck Center.

61 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.

The engine electronics may not be
operating properly.

Unburned gasoline may have entered
the catalytic converter and damaged it.
Give very little gas.
Have the problem repaired at an
authorized Mercedes-Benz Light Truck
Center as soon as possible.The coolant temperature is above
248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the
engine. Allow engine and coolant to
cool off.
Check the coolant level and add
coolant if necessary (
page 274).In case of accident
If the vehicle is leaking fuel:
Do not start the engine under any
circumstances.
Notify local fire and/or police
authorities.
If the extent of the damage cannot be
determined:
Contact an authorized Mercedes-Benz
Light Truck Center or call Roadside
Assistance.
If no damage can be determined on the

major assemblies

fuel system

engine mount:
Start the engine in the usual manner.
iExcessive coolant temperatures trigger a
warning message in the multifunction display
(
page 348).

62 Getting started
Parking and locking
You have now completed your first drive.
You have properly stopped and parked
your vehicle. End your drive as follows.Parking brake
Warning!G
With the engine not running, there is no
power assistance for the brake and the
steering system. In this case, it is important
to keep in mind that a considerably higher
degree of effort is necessary to brake and
steer the vehicle.
Warning!G
Do not park this vehicle in areas where
combustible materials such as grass, hay or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
To reduce the risk of personal injury or
damage to the vehicle drivetrain as a result
of vehicle movement, before turning off the
engine and leaving the vehicle always:

Keep right foot on brake pedal.

Pull the parking brake lever up as many
notches as possible.

Move the gear selector lever to park
positionP.

Slowly release brake pedal.

When parked on an incline, turn front
wheels towards the road curb.

Turn the SmartKey in the starter switch
position0 and remove.

Take the SmartKey with you and lock
vehicle when leaving.
Warning!G
Engaging the parking brake while the vehicle
is in motion can cause the rear wheels to
lock up. You could lose control of the vehicle
and cause an accident. In addition, the
vehicle’s brake lights do not light up when
the parking brake is engaged.