2008 MERCEDES-BENZ R320 door lock

118 Controls in detail
Locking and unlocking
Checking the batteries in the SmartKey
or SmartKey with KEYLESS-GO*
Press button‹orŒ.
The battery check lamp (
page 110)
or (
page 113) comes on briefly to in-
dicate that the SmartKey or SmartKey
with KEYLESS-GO batteries are in
order.Loss of the SmartKey or SmartKey with
KEYLESS-GO*
If you lose your SmartKey or SmartKey
with KEYLESS-GO or mechanical key, you
should do the following:
Have the SmartKey or SmartKey with
KEYLESS-GO deactivated by an
authorized Mercedes-Benz Light
Truck Center.
Report the loss of the SmartKey or
SmartKey with KEYLESS-GO or the
mechanical key to your car insurance
company immediately.
Have the mechanical lock replaced if
necessary.
Any authorized Mercedes-Benz Light Truck
Center will be glad to supply you with a
replacement.
Opening the doors from the inside
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
1Locking knob
2Inside door handle
iIf the battery check lamp does not come on
briefly during check, the SmartKey or SmartKey
with KEYLESS-GO batteries are discharged.
Replace the batteries (
page 479).
You can obtain the required batteries at any
authorized Mercedes-Benz Light Truck Center.
iIf the batteries are checked within signal
range of the vehicle, pressing the‹orŒ
button will lock or unlock the vehicle
accordingly.

119 Controls in detail
Locking and unlocking
Front doors
Pull on inside door handle2 on the
respective front door to open door.
If the door was locked, locking knob1
will move up.
Rear doors
Pull up locking knob1 on the respec-
tive rear door to unlock door.
Pull on inside door handle2 on the re-
spective rear door to open door.
Tailgate/Power tailgate*
A minimum height clearance of
7.2 ft (2.20 m) is required to open the
tailgate.iIf the vehicle has previously been locked
from the outside with the SmartKey or with
KEYLESS-GO*, opening a door from the inside
will trigger the anti-theft alarm system.
To cancel the alarm, do one of the following:
With the SmartKey

Insert the SmartKey in the starter switch.

Press theŒ or ‹button on the
SmartKey.
With KEYLESS-GO*

Grasp an outside door handle.

Press the KEYLESS-GO start/stop button
(
page 41).
The SmartKey with KEYLESS-GO must be
inside the vehicle.
Warning!G
Make sure the tailgate is closed when the
engine is running and while driving.
Among other dangers, deadly carbon
monoxide (CO) gases may enter vehicle
interior resulting in unconsciousness and
death.
!The tailgate swings open upwards automat-
ically. Always make sure there is sufficient over-
head clearance.

121 Controls in detail
Locking and unlocking
Closing the tailgate from the outside
manually
1Handle
Lower tailgate by pulling firmly on
handle1.
Close tailgate with hands placed flat
on it.
Once the tailgate touches the latch,
the tailgate will pull itself shut automat-
ically.Power tailgate*
In vehicles with power tailgate, you can

open and close the tailgate from the
inside and the outside electrically

limit the opening height of the tailgate

interrupt the opening/closing proce-
dure at any time by

pressing or pulling the
door-mounted remote tailgate
switch (
page 122)

pressing the Šbutton on the
SmartKey (
page 110) or
SmartKey with KEYLESS-GO*
(
page 113)

pressing the tailgate closing switch
(
page 124)

pressing the tailgate
closing/locking switch (vehicles
with KEYLESS-GO*) (
page 125)
Warning!G
To prevent possible personal injury, always
keep hands and fingers away from the cargo
compartment opening when closing the
tailgate. Be especially careful when small
children are around.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
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.
iTo prevent an inadvertent lockout, do not
place the SmartKey in the cargo compartment.
Vehicles with KEYLESS-GO*: To prevent a
possible inadvertent lockout, the tailgate will
open automatically if a SmartKey with
KEYLESS-GO is recognized inside the vehicle.iIf the vehicle was previously centrally locked
with the SmartKey or KEYLESS-GO*, the tailgate
will lock automatically after closing it. The turn
signals flash three times to confirm locking.
!The tailgate swings open upwards automat-
ically. Always make sure there is sufficient over-
head clearance.

122 Controls in detail
Locking and unlocking
Opening the tailgate from the outside
You can unlock and open the tailgate
simultaneously from the outside when the
vehicle is at a standstill.
Press and hold buttonŠ on the
SmartKey or SmartKey with
KEYLESS-GO* until the tailgate unlocks
and opens.
While the tailgate is opening, an
acoustic signal sounds.
or
Vehicles with KEYLESS-GO*:
Pull on the handle (
page 120).
The tailgate is unlocked and opens.
While the tailgate is opening, an
acoustic signal sounds.Opening the tailgate from the inside
You can unlock and open the tailgate
simultaneously from the driver’s seat when
the vehicle is at a standstill.The switch is located on the door control
panel.
1Remote tailgate switchPull remote tailgate switch1 until
tailgate begins to open.
The tailgate opens. While the tailgate is
opening, an acoustic signal sounds.
Warning!G
Maintain sight of the area around the rear of
the vehicle while operating the tailgate with
the door-mounted remote tailgate switch or
with the Šbutton on the SmartKey or
SmartKey with KEYLESS-GO*. Monitor the
opening procedure carefully to make sure
no one is in danger of being injured.
To interrupt the opening procedure, press or
pull the door-mounted remote tailgate
switch or press the Šbutton on the
SmartKey or SmartKey with KEYLESS-GO*.

123 Controls in detail
Locking and unlocking
Limiting opening height of tailgate*
In vehicles with power tailgate*, the tail-
gate opening height can be limited when
transporting goods on a roof rack*
(e.g. presence of an MB sport luggage
container*). When activated, the tailgate
opens to approximately 6.4 ft (1.95 m).
Activate the limiting opening height of
tailgate using the control system
(
page 183).
Closing the tailgate from the inside
You can close the tailgate from the inside
using the remote tailgate switch.
If the tailgate comes into contact with an
object while closing (e.g. luggage that has
been piled too high) the closing procedure
is stopped and the tailgate reopens.
Press remote tailgate switch1
(
page 122) until tailgate begins to
close.
The tailgate closes. While the tailgate is
closing an acoustic signal sounds.
To interrupt the closing procedure:
Press or pull remote tailgate switch1
(
page 122).
Warning!G
Maintain sight of the area around the rear of
the vehicle while operating the tailgate with
the door-mounted switch. Monitor the
closing procedure carefully to make sure no
one is in danger of being injured.
To interrupt the closing procedure, press or
pull the door-mounted remote tailgate
switch or press the Šbutton on the
SmartKey or SmartKey with KEYLESS-GO*.
Even with the SmartKey or the SmartKey
with KEYLESS-GO* removed from the
starter switch or the SmartKey with
KEYLESS-GO* removed from the vehicle,
the remote tailgate switch can be operated.
Therefore, do not leave children unattended
i n t h e v e h i c l e , o r w i t h a c c e s s t o a n u n l o c k e d
vehicle. A child’s unsupervised access to a
vehicle could result in an accident and/or
serious personal injury.

124 Controls in detail
Locking and unlocking
Closing the tailgate from the outside
You can close the tailgate from the outside
using the tailgate closing switch or
theŠbutton on the SmartKey or
SmartKey with KEYLESS-GO*.
In vehicles with KEYLESS-GO*, you can
also simultaneously lock the vehicle.
If the tailgate comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the tailgate reopens.
Vehicles without KEYLESS-GO*
1Tailgate closing switch
Vehicles with KEYLESS-GO*
1Tailgate closing switch
Press tailgate closing switch1 or the
Šbutton on the SmartKey or
SmartKey with KEYLESS-GO* briefly.
The tailgate closes and an acoustic
warning sounds.
Warning!G
Monitor the closing procedure carefully to
make sure no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the cargo compartment opening when clos-
ing the tailgate. Be especially careful when
small children are around. To stop the clos-
ing procedure, do one of the following:

Press tailgate closing switch1
(
page 124).

Press KEYLESS-GO locking/closing
switch* 1 (
page 125).

Press the Šbutton on the SmartKey
(
page 110) or SmartKey with
KEYLESS-GO* (
page 113).

Press or pull the remote tailgate switch
on the driver’s door (
page 122).
Even with the SmartKey removed from the
starter switch or the SmartKey with
KEYLESS-GO* removed from the vehicle,
the tailgate closing switch can be operated.
Therefore, 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.

125 Controls in detail
Locking and unlocking
Closing the tailgate and locking the
vehicle from the outside (vehicles with
KEYLESS-GO*)
In vehicles with power tailgate and
KEYLESS-GO*, you can close the tailgate
and lock the vehicle simultaneously from
the outside using the KEYLESS-GO* lock-
ing/closing switch.
If the tailgate comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the tailgate reopens.
Make sure you have the SmartKey with
KEYLESS-GO* with you.1KEYLESS-GO* locking/closing switch
Press KEYLESS-GO* locking/closing
switch1 briefly.
The tailgate closes automatically and
an acoustic warning sounds. Once the
tailgate is closed, the vehicle locks if
doors are closed. The turn signals flash
three times to confirm locking. The
locking knobs in the doors move down.
The anti-theft alarm system is armed.
iDo not place the SmartKey or SmartKey with
KEYLESS-GO* in the open cargo compartment.
You may lock yourself out.
iIf the vehicle was previously centrally
locked, the tailgate will lock automatically after
closing it. The turn signals will flash three times
to confirm locking.
Warning!G
Monitor the closing procedure carefully to
make sure no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the cargo compartment opening when clos-
ing the tailgate. Be especially careful when
small children are around. To stop the clos-
ing procedure, do one of the following:

Press tailgate closing switch1
(
page 124).

Press KEYLESS-GO locking/closing
switch* 1 (
page 125).

Press the Šbutton on the SmartKey
with KEYLESS-GO* (
page 113).

Press or pull the remote tailgate switch
on the driver’s door (
page 122).

126 Controls in detail
Locking and unlocking
Automatic central locking
The doors and the tailgate lock automati-
cally when the ignition is switched on and
the wheels are turning at vehicle speeds of
approximately 9 mph (15 km/h) or more.
For information on towing the vehicle, see
“Towing the vehicle” (
page 513).
You can deactivate the automatic locking
mode using the control system
(
page 183).
Locking and unlocking from the inside
You can lock or unlock the doors and the
tailgate from inside using the central lock-
ing or unlocking switch. This can be useful,
for example, if you want to lock the vehicle
before starting to drive.
The fuel filler flap cannot be locked or un-
locked with the central locking or unlock-
ing switch.Even with the SmartKey with KEYLESS-GO*
removed from the vehicle, the tailgate
closing switch can be operated. Therefore,
do not leave children unattended in the ve-
hicle, 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.
iTo prevent a possible inadvertent lockout,
the tailgate will open automatically if a SmartKey
with KEYLESS-GO* is recognized inside the
vehicle.
iYou can open a locked door from the inside.
Open door only when conditions are safe to do
so.
iThe doors unlock automatically after an
accident if the force of the impact exceeds a pre-
set threshold.
The vehicle automatically locks when the
ignition is switched on and the wheels are
turning at vehicle speeds of approximately
9 mph (15 km/h) or more. You could therefore
lock yourself out when the vehicle

is pushed or towed

is on a test stand
Warning!G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended 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.