Page 86 of 376

86 Controls in detailLocking and unlocking
Checking the batteries
Press button
‹
or
Œ
.
Battery check lamp5 lights up briefly
to indicate that the key batteries are in
order.Unlocking the trunk lid
You can unlock the trunk separately.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
Press button
Š
until trunk opens.
The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
page 89).
!If you can no longer lock or unlock the
vehicle with the key, then either the
batteries in the SmartKey are dis-
charged, the key is malfunctioning or
the vehicle battery is drained.
Check the batteries in the key
(page 86) and replace them if
necessary (
page 286).
Use the mechanical key to lock and
unlock the doors (
page 285) and
the trunk lid (
page 91) as re-
quired.
Check the vehicle battery
(page 303)
If the key is malfunctioning, contact an
authorized Mercedes-Benz Center.
!If battery check lamp5 does not light
up briefly during check, then the key
batteries are discharged.
Replace the batteries (
page 286).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 89). The
turn signals will flash three times to
confirm locking.
If the trunk lid was previously
separately locked (page 90), the
trunk lid will remain locked.
Page 88 of 376

88 Controls in detailLocking and unlockingOpening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The switch is located on the driver’s door.
1Remote trunk lid release switch with in-
dicator lamp
Press remote trunk lid release
switch1.
The trunk lid opens. The indicator lamp
in the switch remains lit as long as the
trunk is open.The trunk can also be opened using the
SmartKey (
page 86) or from its inside in
an emergency, see “Trunk lid emergency
release” (
page 89).
Opening the trunk
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The handle is located above the rear li-
cense plate recess.
1Handle
Pull handle1 to open the trunk lid.
The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 89). The
turn signals will flash three times to
confirm locking.
If the vehicle was previously separately
locked (
page 90) or locked with the
SmartKey (page 85), the trunk lid will
remain locked.
iThe vehicle must be unlocked.
Page 90 of 376

90 Controls in detailLocking and unlockingIllumination of the emergency release but-
ton:
The button will blink for 30 minutes af-
ter opening the trunk.
The button will blink for 60 minutes af-
ter closing the trunk.
Separately locking the trunk
The lock is located next to the recessed
handle.
1Unlocked
2Locked
Close the trunk lid (
page 89).
Pull the mechanical key out of the
SmartKey (
page 285).
Insert the mechanical key in the trunk
lid lock.
Turn the key completely to the right to
position2.
The trunk remains locked even when the
vehicle is centrally unlocked.
!The emergency release button does
not open the trunk lid, if the vehicle
battery is discharged or disconnected.iIf the emergency release button is
pressed and the vehicle was centrally
locked, the exterior lamps will flash and
the alarm will sound as the trunk lid
opens.
To cancel the alarm, insert the key in
the starter switch or press button
Œ
or
‹
on the key.
iTo deny any unauthorized person ac-
cess to the trunk, lock it separately
with the mechanical key. Leave only
the SmartKey less its mechanical key
with the vehicle.
iYou can only cancel the separate trunk
locking mode by means of the mechan-
ical key.
Page 91 of 376

91 Controls in detail
Locking and unlocking
Separately unlocking the trunk
Pull the mechanical key out of the
SmartKey (
page 285).
Insert the mechanical key in the trunk
lid lock.
Turn the key completely to the left to
position1, see above.
You can now open the trunk (
page 88).
Automatic central locking
The doors and the trunk automatically lock
when the ignition is switched on and the
wheels are turning at vehicle speeds of ap-
proximately 9 mph (15 km/h) or more.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
You can deactivate the automatic locking
using the control system (
page 129).
iUnlocking the trunk with the mechani-
cal key will trigger the anti-theft alarm
system. To cancel the alarm, do one of
the following:
Press button
Œ
or
‹
on the
SmartKey.
Insert the SmartKey in the starter
switch.
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset 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
is on a test stand
Page 93 of 376

93 Controls in detail
Seats
Seats
Information on seat adjustment can be
found in the “Getting started” section
(page 32).
Easy-entry/exit feature*
With the easy-entry/exit feature activated,
the steering wheel tilts upwards and the
driver’s seat moves to the rear.
This allows easier entry into and exit from
the vehicle when the driver’s door is
opened. However, the engine must be
turned off.
When the SmartKey is inserted in the start-
er switch and the driver’s door is closed,
the steering wheel and the driver’s seat re-
turn to their last set positions.You can activate the following functions:
Steering column:
Only the steering column is adjusted.
Steering column and seat:
The steering column and the seat are
adjusted.
The easy-entry/exit feature can be
switched on or off in the individual setting
menu
CONVENIENCE
- EASY-ENTRY FEATURE
ACTIVATE
(page 129).
Warning!
G
You must make sure that no one can be-
come trapped or injured by the moving
steering wheel and the driver’s seat when
the easy-entry/exit feature* is activated,
the driver’s door is being opened and the en-
gine is turned off or the SmartKey is re-
moved from the starter switch. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Unsuper-
vised use of vehicle equipment may cause
an accident and/or serious personal injury.
Do not leave children unattended in the ve-
hicle, or with access to an unlocked vehicle.
Children could open the driver’s door and
unintentionally activate the easy-entry/exit
feature*, which could result in an accident
and/or serious personal injury.
iTo cancel seat/steering wheel move-
ment, do one of the following:
press seat adjustment switch
(page 28)
move steering column stalk
(page 32)
press memory switch (
page 28)
Page 94 of 376

94 Controls in detailSeatsHead restraints
Information on head restraint adjustment
can be found in the “Getting started” sec-
tion (
page 32).Front seat head restraints, manual seat
Removing front head restraints
Pull head restraint to its highest posi-
tion.
Push button1 and pull out head re-
straint.
Installing front head restraints
Insert head restraint and push it down
to the stop.
Push button1 and adjust head re-
straint to desired position.Front seat head restraints, power seat*
Removing front head restraints
Press switch1 upwards and hold until
the head restraint is fully extended.
Pull out head restraint.
Installing front head restraints
Press switch1 upwards and hold for
about five seconds.
Push the head restraint down until it
engages.
Adjust head restraint to desired posi-
tion (
page 34).
Warning!
G
For your protection, drive only with properly
positioned head restraints.
Adjust head restraint to support the back of
the head approximately at ear level.
Do not drive the vehicle without the seat
head restraints. Head restraints are intend-
ed to help reduce injuries during an acci-
dent.iTilt the backrest to the rear for easier
removal and installation of the head re-
straints.
Page 98 of 376

98 Controls in detailMemory function*
Memory function*
You can store up to three different settings
per key.
The following settings are saved for each
stored position:
Driver’s seat and backrest position
Steering wheel position
Driver’s side exterior rear view mirror
position
Passenger side exterior rear view mir-
ror position
Front passenger seat position
These key-dependent memory settings
can be deactivated if desired (
page 99).
!Prior to operating the vehicle, the driv-
er should check and adjust the seat
height, seat position fore and aft, and
seat backrest angle if necessary, to
ensure adequate control, reach and
comfort. The head restraint should also
be adjusted for proper height. Also see
airbag section (
page 57) for proper
seat positioning.
In addition, adjust the steering wheel to
ensure adequate control, reach, opera-
tion and comfort. Both the inside and
outside rear view mirrors should be ad-
justed for adequate rear vision.
Fasten seat belts. Infants and small
children should be seated in a properly
secured restraint system that complies
with U.S. Federal Motor Vehicle Safety
Standards 213 and 225 and Canadian
Motor Vehicle Safety Standards 213
and 210.2.
Warning!
G
Do not activate the memory function while
driving. Activating the memory function
while driving could cause the driver to lose
control of the vehicle.
Page 99 of 376

99 Controls in detail
Memory function*
The memory button and stored position
button are located on the door.
1Memory button
2Stored position button
Make sure that the ignition is switched
on or the relevant door is open and the
SmartKey is inserted in the starter
switch.
Storing positions into memory
Adjust the seats, steering wheel and
rear view mirrors to the desired posi-
tion (
page 32).
Turn button2 to selected memory po-
sition.
Press memory button1.
Release memory button and push
button2 within three seconds.
All the settings are stored at the select-
ed position.
Recalling positions from memory
Turn button2 to selected memory po-
sition.
Press and hold button2 until the seat,
steering wheel and rear view mirrors
have fully moved to the stored posi-
tions.iReleasing the button immediately
stops movement to the stored posi-
tions.Warning!
G
Do not operate the power seats using the
memory button if the seat backrest is in an
excessively reclined position. Doing so
could cause damage to front or rear seats.
First move backrest to an upright position.