2009 MERCEDES-BENZ G-Class Owner's Manual

Automatic transmission
Introduction
For information on driving with an automatic
transmission, see “Driving and parking”
(Y page 82).
GWarning!
Make sure absolutely no objects are
obstructing the pedals’ range of movement.
Keep the driver’s footwell clear of all
obstacles. If there are any floormats or
carpets in the footwell, make sure the pedals
still have sufficient clearance.
During sudden driving or braking maneuvers
the objects could get caught between the
pedals. You could then no longer brake or
accelerate. This could lead to accidents and
injury.
! Allow the engine to warm up under low
load use. Do not place full load on the
engine until the operating temperature has
been reached.
Avoid spinning of a drive wheel for an
extended period when driving off on
slippery road surfaces.
This may cause serious damage to the
engine and the drivetrain which is not
covered by the Mercedes-Benz Limited
Warranty.
iDuring the brief warm-up, transmission
upshifting is delayed. This allows the
catalytic converter to heat up more quickly
to operating temperature.
Gear selector lever
Gearshift pattern for automatic transmission
jPark position with gear selector lever lockkReverse geariNeutral positionhDrive positionGWarning!
It is dangerous to shift the automatic
transmission out of park position P or neutral
position 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.
! Only shift the automatic transmission into
reverse gear R or park position P when the
vehicle is stopped. Otherwise the
automatic transmission could be damaged.
iShifting the automatic transmission out of
park position P is only possible with the
brake pedal depressed.
Only depressing the brake pedal releases
the gear selector lever lock.
iThe current gear selector lever position
corresponds with the current transmission
position.
Automatic transmission87Controls in detail463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 87Z

The current transmission position P, R, N,
or D appears in the multifunction display
(Y page 88).
Shifting procedure
The automatic transmission selects individual
gears automatically, depending on:Rthe selected gear range (Y page 89)
Rtransfer case position (HIGH or LOW)
(Y page 91)
Rthe position of the accelerator pedal
Rthe vehicle speed
With drive position D selected, you can
influence transmission shifting by limiting or
extending the gear range.
Transmission positions
The current transmission position appears in
the multifunction display.
:Transmission position indicator EffectBPark position
Shift the automatic transmission
into park position P only when the
vehicle is stopped. The park
position is not intended to serve as
a brake when the vehicle is parked.
Rather, the driver should always
engage the parking brake in
addition to shifting the automatic
transmission into park position P to
secure the vehicle.
The SmartKey can only be removed
from the starter switch with the
gear selector lever in park position
P. With the SmartKey removed from
the starter switch, the gear selector
lever is locked in park position P.
If the vehicle’s electrical system is
malfunctioning, the gear selector
lever could remain locked in park
position P. To unlock the gear
selector lever manually, see
“Manually unlocking the gear
selector lever” (Y page 222).
CReverse gear
Shift the automatic transmission
into reverse gear R only when the
vehicle is stopped.
88Automatic transmissionControls in detail
463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 88

EffectANeutral position
No power is transmitted from the
engine to the drive axle. When the
brakes are released, the vehicle can
be moved freely (pushed or towed).
To avoid damage to the
transmission, never shift the
automatic transmission into neutral
position N while driving.
Exceptions:
RIf the ESP® is deactivated or
malfunctioning, shift the
automatic transmission into
neutral position N if the vehicle is
in danger of skidding.
RShift the automatic transmission
into neutral position N if you have
to shift the transfer case.
! Coasting the vehicle, or driving
for any other reason with the
automatic transmission in neutral
position N can result in
transmission damage that is not
covered by the Mercedes-Benz
Limited Warranty.
7Drive position
The automatic transmission shifts
automatically. All forward gears are
available.
Driving tips
Kickdown
Use the kickdown when you want maximum
acceleration.
XDepress the accelerator pedal past the
point of resistance.
Depending on the engine speed the
automatic transmission shifts into a lower
gear.
Working on the vehicleGWarning!
When working on the vehicle, engage the
parking brake and shift the automatic
transmission into park position P. Otherwise
the vehicle could roll away which could result
in an accident and/or serious personal injury.
Gear ranges
With the automatic transmission in drive
position D, you can limit or extend the gear
range, see “One-touch gearshifting”
(Y page 90).
The current gear range appears in the
multifunction display.
:Gear range indicator
! If the transfer case is in off-road position
LOW, the automatic transmission will not
shift up automatically, even when the
engine has reached the speed limit for that
gear. There is a risk of damaging the
engine.
It is very important to make sure the
permissible engine speed is not exceeded.
Automatic transmission89Controls in detail463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 89Z

XWait at least 10 seconds before restarting.XRestart the engine.XShift the automatic transmission into drive
position D (for second gear) or reverse gear
R.
XHave the automatic transmission checked
at an authorized Mercedes-Benz Center as
soon as possible.
Transfer case
For more information on off-road driving, see
“Off-road driving” (Y page 179).
Transfer case position
HHIGH
Road position
LLOW
Off-road position
This position is intended for
driving off-road and step
gradients.
The automatic transmission
will not upshift
automatically to the next
higher gear range when
driving at the rpm limit.
The transfer case supports
the engine’s driving force
(approximately 1/2 speed).
Output is therefore
increased.
NNeutral
No power is transmitted
from the engine to the drive
axle.
Switching transfer case
The transfer case switch is located on the
lower part of the center console.
Transfer case switch
Current transfer case indicator : appears in
the multifunction display.
GWarning!
Always wait until the procedure of shifting
from HIGH to LOW – and from LOW to HIGH
– has been entirely completed. During this
procedure do not turn off the engine or shift
the automatic transmission into another gear.
If you do not wait until the shifting procedure
has been entirely completed then it might not
be correctly performed. The transfer case
might be in neutral, thus interrupting the
transfer of power between the engine and the
drive axle.
The vehicle is then freely movable, even if a
gear has been selected, and could
unintentionally be set into motion –
particularly on up – or downhill grades. This
Transfer case91Controls in detail463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 91Z

switches in sequential order (center, rear,
front) (Y page 94). When the transfer case
(center) differential is locked, half of the
engine’s power is automatically distributed to
the front wheels and half to the rear wheels.
When the rear differential is locked, power
going to the rear wheels is equally distributed,
so that both rear wheels turn at the same
speed and torque. Please be aware that
engaging the differential locks will
significantly reduce the steering ability of the
vehicle.
For your safety and the safety of others and
to prevent damage to the vehicle, the
differential locks must not be engaged when
driving on paved roads. It is important to
understand that during on-road/paved
driving, differentials are absolutely necessary
for providing the essential control and
steering ability of the vehicle. The differential
locks, therefore, must not be engaged when
driving on paved roads and should only be
used to the extent necessary to negotiate off-
road conditions which cannot be handled by
the systems (the 4-ETS, the ESP®, and the
manual switch position “LOW” of transfer
case) this vehicle comes equipped with.
Switching differential locks on and off
The switches are located on the upper part of
the center console.
:Transfer case (center) differential lock;Rear axle differential lock=Front differential lock?Engagement indicator lamps (yellow)AFunction indicator lamps (red)
The differential locks can only be switched on
in the sequence :, ;, =.
Switching differential locks on
! To avoid damage to the transfer case and
differential locks:
REngage the differential locks only at low
speed (walking speed, not more than
5 mph [8 km/h]).
RDo not engage the differential locks if the
driving wheels are spinning due to lack
of traction.
RDo not engage the differential locks on
paved roads.
Transfer case differential lock
XPress switch :.
Yellow engagement indicator lamp ? for
the transfer case differential lock comes
on.
The ESP® warning lamp d in the
instrument cluster comes on.
When the differential lock engagement
operation has been completed, the red
function indicator lamp A comes on.
The message ABS not available
differential locked appears in the
multifunction display.
The ESP® warning lamp d and the !
indicator lamp 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 lock ;, or switch on
rear axle differential lock ; and front
differential lock =.
94Differential locksControls in detail
463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 94