
Example illustration driver’s door
XPress central unlocking switch
( Y  page 239).
or
XPull locking knob  0046 up.XPull on inside door handle  0047 on the
respective door.XSwing the door up as far as it will go.
Automatic central locking
The doors lock automatically when the
vehicle is set into motion.
The doors are unlocked when you turn off the
engine after driving.
The doors are designed to unlock
automatically after an accident if the force of
the impact exceeds a preset threshold.
The vehicle locks automatically when the
ignition is switched on and the wheels are
turning at a vehicle speed of above 9 mph
(15 km/h) . You could therefore lock yourself
out when the vehicle is pushed or towed or is
on a test stand.
Locking and unlocking from the inside
GObserve Safety notes, see page 57.
You can lock or unlock the vehicle from the
inside using the central locking or unlocking
switch. This can be useful, for example, if you
want to lock the vehicle before starting to
drive.
The central locking or unlocking switch does
not lock or unlock the fuel filler flap.XLocking:  Press central locking switch  0047.
When all doors are closed, the vehicle
locks.XUnlocking:  Press central unlocking
switch  0046.
If the vehicle has been locked centrally with
the SmartKey, it will not unlock using the
central unlocking switch.
Opening the trunk
GWarning!
Make sure the trunk 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.
!  When you open the trunk, the trunk lid
swings open upwards. Always make sure
there is sufficient overhead clearance.
A minimum height clearance of 5.5 ft (1.68 m)
is required to open the trunk lid.
Locking and unlocking239Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 239Z   

Opening the trunk from the outsideXPress button \000T on the SmartKey.
The trunk unlocks and opens slightly.
XReach into the gap and lift the trunk lid.
If the trunk does not open, it is still locked
separately (Y page 241).
Opening the trunk from the inside
You can open the trunk when the vehicle is
stationary.
XPress remote trunk opening switch \000F until
the trunk unlocks and opens slightly.
XLift the trunk lid.
If the trunk does not open, it is still locked
separately (Y page 241).
Closing the trunk
GWarning!
Make sure the trunk 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.
GWarning!
To prevent possible personal injury, always
keep hands and fingers away from the trunk
opening when closing the trunk lid. Be
especially careful when small children are
around.
GObserve Safety notes, see page 57.
Do not leave the SmartKey in the open trunk.
You may lock yourself out.
If the vehicle was previously locked centrally
with the SmartKey, the trunk lid will lock
automatically when closed. All turn signal
lamps flash three times and an acoustic signal
sounds three times to confirm locking.
XPull the trunk lid down at handle \000F firmly.
Trunk lid emergency release
The trunk lid can be opened from inside the
trunk with the emergency release button.
240Locking and unlockingControls in detail
BA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 240     

XBriefly press emergency release
button \000F.
The trunk lid unlocks and opens slightly.
XPush up the trunk lid to fully open.
The emergency release button unlocks the
trunk while the vehicle is standing still or in
motion.
Illumination of the emergency release button:
RThe button flashes for 30 minutes after
opening the trunk.
RThe button flashes for 60 minutes after
closing the trunk.
The emergency release button does not
unlock the trunk, if the vehicle battery is
discharged or disconnected.
If the vehicle has previously been locked
centrally with the SmartKey, opening the
trunk from the inside using the emergency
release button will trigger the anti-theft alarm
system.
To cancel the alarm, see (Y page 67).
Valet locking
You can lock the trunk separately with the
mechanical key. This denies unauthorized
access to the trunk, e.g. when you valet park
the vehicle.
XLeave only the SmartKey less its
mechanical key with the vehicle.
XValet locking: Close the trunk
(Y page 240).
XRemove the mechanical key from the
SmartKey (Y page 397).
XOpen the rear storage compartment in the
center console (Y page 304).
XInsert the mechanical key into trunk lid
lock \000F.
XTurn the mechanical key clockwise as far
as it will go.
XIn this position, pull out the mechanical
key.
XCheck whether the trunk is locked.
The trunk remains locked even when the
vehicle is centrally unlocked.
You can then only open the trunk with the
mechanical key.
XCanceling: Insert the mechanical into
trunk lid lock \000F.
XTurn the mechanical key counterclockwise
as far as it will go.
XIn this position, pull out the mechanical
key.
You can now open the trunk.
Starter switch positions
KEYLESS-GO
GObserve Safety notes, see page 57.
You can start the engine and turn it off again
using the KEYLESS-GO start/stop button.
The KEYLESS-GO start/stop button is located
in the center console. The KEYLESS-GO
start/stop button is illuminated when the
vehicle is unlocked.
The SmartKey must be located in the vehicle.
It will, however, not be detected in the trunk.
Pressing the KEYLESS-GO start/stop button
without depressing the brake pedal
Starter switch positions241Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 241Z  

beam headlamp indicator lamp, high-beam
headlamp indicator lamp, and the turn signal
indicator lamps will only come on if activated.
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”
( Y  page 388).XAlways remove the SmartKey from the
starter switch when the engine is not in
operation.
This will help to prevent accelerated vehicle
battery discharge or a completely
discharged vehicle battery.
If the SmartKey cannot be turned in the
starter switch, the vehicle battery may not be
sufficiently charged.
XCheck the vehicle battery and charge it if
necessary ( Y page 410).
or
XGet a jump start ( Y page 413).
i
If the SmartKey does not belong to the
vehicle, the SmartKey can be turned in the
starter switch. However, the ignition does
not switch on and the engine does not start.
Seats
Safety notes
GWarning!
In order to avoid possible loss of vehicle
control the following must be done before the
vehicle is put into motion:
R seat adjustment
R steering wheel adjustment
R rear view mirror adjustment
R fastening of seat belts
GWarning!
Do not adjust the driver’s seat while driving.
Adjusting the seat while driving could cause
the driver to lose control of the vehicle.
Never ride in a moving vehicle with the seat
backrest in an excessively reclined position as
this can be dangerous. You could slide under
the seat belt in a collision. If you slide under
it, the seat belt would apply force at the
abdomen or neck. That could cause serious
or fatal injuries. The seat backrest and seat
belts provide the best restraint when the
wearer is in a position that is as upright as
possible and seat belts are properly
positioned on the body.
GWarning!
Your seat must be adjusted so that you can
correctly fasten your seat belt.
Observe the following points:
R Adjust the seat backrest until your arms are
slightly angled when holding the steering
wheel.
R Adjust the seat to a comfortable seating
position that still allows you to reach the
accelerator/brake pedal safely. The
position should be as far back as possible
with the driver still able to operate the
controls properly.
R Never place hands under the seat or near
any moving parts while a seat is being
adjusted.
Failure to do so could result in an accident
and/or serious personal injury.
GWarning!
The power seats can be operated at any time.
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.
Seats243Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 243Z 

Seat heating
The red indicator lamps in seat heating
switch \000F come on to show which heating
level you have selected.
The seat heating switches from level 3 (high)
to level 2 after approximately 5 minutes.
The seat heating switches from level 2 to level
1 (low) after approximately 10 minutes.
After approximately 20 minutes in level 1, the
seat heating switches off automatically.
XSwitch on the ignition.XSwitching on: Press seat heating
switch \000F.
Three red indicator lamps in seat heating
switch \000F come on.
XPress seat heating switch \000F repeatedly
until the desired seat heating level is set.
If there is insufficient voltage the seat heating
switches off automatically.
The seat heating will switch back on again
automatically as soon as sufficient voltage is
available.
Multifunction steering wheel
Safety notes
GWarning!
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
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.
Make sure
Ryou can reach the steering wheel with your
arms slightly bent at the elbows
Ryou can move your legs freely
Rall displays (including malfunction and
indicator lamps) on the instrument cluster
are clearly visible
Steering wheel adjustment
XAdjusting steering wheel in or out: Move
stalk in direction of arrows \000F.
XAdjusting steering wheel up or down:
Move stalk in direction of arrows \000G.
iThe memory function (Y page 249) lets
you store the settings for the steering
wheel together with the settings for the
seat position and the exterior rear view
mirrors.
Easy-entry/exit feature
This feature allows the driver an easier entry
into and exit from the vehicle. When entering
and exiting the vehicle, the steering wheel is
in its uppermost position.
Multifunction steering wheel245Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 245Z   

The easy-entry/exit feature can be activated
or deactivated in the  Convenience submenu
of the control system ( Y page 286).GWarning!
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering wheel adjustment stalk or press one
of the memory position buttons.
Do not leave children unattended in the
vehicle, 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.
With the easy-entry/exit feature activated,
the steering wheel will return to its last set
position when
R you close the driver’s door with the ignition
switched on
R when you insert the SmartKey into the
starter switch or press the KEYLESS-GO
start/stop button once with the driver’s
door closed
i The last set steering wheel position is
stored when the ignition is switched off or
the position is stored in memory
( Y  page 249).
With the easy-entry/exit feature activated,
the steering wheel tilts upwards when
R you remove the SmartKey from the starter
switch
R when you open the driver’s door with the
KEYLESS-GO start/stop button in position
1  or the SmartKey in starter switch position
0  or  1
i When the current position for the steering
wheel is in the uppermost tilt position, the
steering wheel will no longer be able to
move upward when the easy-entry/exit
feature is activated.
The adjustment procedure is briefly
interrupted when the engine is started.GWarning!
Let the system complete the adjustment
procedure before setting the vehicle in
motion. All steering wheel adjustment must
be completed before setting the vehicle in
motion. Driving off with the steering wheel
still adjusting could cause the driver to lose
control of the vehicle.
Crash-responsive exit aid
When you open the driver’s door after an
accident has occurred, the steering column
moves up. The position of the SmartKey in the
starter switch is insignificant. This function
facilitates exiting as well as rescue of vehicle
occupants.
The crash-responsive exit aid can only be
triggered when the easy-entry/exit feature is
activated via the control system.
Mirrors
Notes
Adjust the interior and exterior rear view
mirrors before driving so that you have a good
view of the road and traffic conditions.
Interior rear view mirror
XAdjust the interior rear view mirror
manually.
Exterior rear view mirrors
GWarning!
Exercise care when using the passenger-side
exterior rear view mirror. The mirror surface
is convex (outwardly curved surface for a
wider field of view). Objects in mirror are
closer than they appear. Check your interior
246MirrorsControls in detail
BA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 246 

The exterior rear view mirrors fold out
automatically as soon as the vehicle is
unlocked and the driver’s or passenger door
is subsequently opened.
Memory function
Notes
With the memory function you can store up
to three different configurations per front
seat.
Each memory position button on the driver’s
side can store all of the following settings:
RSeat position and dorsal support
RSteering wheel position
RExterior rear view mirrors’ position
GWarning!
Do not activate the memory function while
driving. Activating the memory function while
driving could cause the driver to lose control
of the vehicle.
Each memory position button on the
passenger side can store the setting of the
seat position and dorsal support.
Storing positions into memoryXAdjust the seats.XOn the driver’s side, also adjust the
steering wheel and exterior rear view
mirrors to the desired positions.
XPress memory button M once and within
3 seconds press memory position button 1,
2 or 3.
When the settings are stored to the
selected position, an acknowledgement
signal sounds.
Recalling positions from memory
XPress and hold desired memory position
button 1, 2 or 3 until the seat has moved
to the stored position completely. On the
driver’s side, also wait for the steering
wheel and exterior rear view mirrors to
move to the stored position.
iReleasing the memory position button
stops movement to the stored positions
immediately.
Lighting
Notes
iIf you drive in countries with left-hand
driving, you must have the headlamps
modified for symmetrical low beams.
Relevant information can be obtained at
any authorized Mercedes-Benz Center.
Lighting249Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 249Z  

For information on filling up the washer
reservoir, see “Washer system and headlamp
cleaning system” ( Y page 325).
For information on cleaning the headlamps
with washer fluid, see “Headlamp cleaning
system” ( Y page 252).
Problems with wipers
!  If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off
immediately.
For safety reasons, do the following before
attempting to remove any blockage:
R Stop the vehicle in a safe location.
R Turn off the engine by pressing the
KEYLESS-GO start/stop button and
open the driver’s door (with the driver’s
door open, starter switch is in position
0 , same as with SmartKey removed from
starter switch).
or
R Remove the SmartKey from the starter
switch.
R Engage the electronic parking brake.
R Remove blockage.
R Turn the windshield wipers on again.
If the windshield wipers fail to function at
all with the combination switch in position
0062  or 0063 ,
R set the combination switch to the next
higher wiper speed
R have the windshield wipers checked at
the nearest authorized Mercedes-Benz
Center
Power windows
Opening and closing
The door windows are opened and closed
electrically. The switches for all windows are
located on the driver’s door. The switch for
operating the passenger-side windows is
located on the passenger door.GObserve Safety notes, see page 57.GWarning!
When opening or closing the door windows,
make sure there is no danger of anyone being
harmed by the opening/closing procedure.
The door windows are equipped with the
express operation and automatic reversal
function. If in express operation mode a door
window encounters an obstruction that
blocks its path, the automatic reversal
function will stop the door window and open
it slightly.
The door windows operate differently when
the switch is pulled and held. See the “Closing
when a door window is blocked” section in
this chapter for details.
The closing of the door windows can be
immediately halted by releasing the switch or,
if the switch was pulled past the resistance
point and released, by either pressing or
pulling the respective switch.
If a door window encounters an obstruction
that blocks its path in a circumstance where
you are closing the door windows by pressing
and holding button  0037 on the SmartKey the
automatic reversal function will not operate.
i You can also open or close the door
windows using the SmartKey, see
“Summer opening feature” ( Y page 256)
and “Convenience closing feature”
( Y  page 257).
i After switching off the ignition or
removing the SmartKey from the starter
switch, you can operate the door windows
until you open a door. If no door was
opened you can operate the door windows
for up to 5 minutes.
Power windows255Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 255Z