
If the driver's door is open, the door stays
unlocked.
Meanwhile, the fuel filler flap will not be
locked or unlocked.
You cannot unlock the vehicle centrally from
the inside if the vehicle has been locked with the SmartKey or KEYLESS-GO.
The doors can be opened from the inside. You
can only open the rear doors from inside the
vehicle if they are not secured by the child-
proof locks (Y page 75).
If the vehicle has been locked with the Smart-
Key or with KEYLESS-GO, opening a door from the inside will trigger the anti-theft alarm sys-
tem. Switch off the alarm (Y page 86).
i If a locked door is opened from the inside,
the previous unlock status of the vehicle
will be taken into consideration if:
R the vehicle was locked using the locking
button for the central locking, or
R if the vehicle was locked automatically
The vehicle will be fully unlocked if it had
previously been fully unlocked. If only the
driver's door had been previously
unlocked, only the door which has been
opened from the inside is unlocked. Automatic locking feature
X
To deactivate: press and hold button :
for about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds. i
If you press one of the two buttons and do
not hear a tone, the relevant setting has
already been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning.
You could therefore be locked out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on a roller dynamometer.
i You can switch the automatic locking
function on and off using COMAND (see the
separate operating instructions). Power closing
Power closing pulls the doors and trunk lid
into their locks automatically even if they are only partly closed.
X To power close a door: push the door into
the lock up to the first detent position.
Power closing will pull the door fully closed.
X To power close the trunk lid: lightly push
the trunk lid closed.
The power closing function pulls the trunk
lid closed. Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
X Take the mechanical key out of the Smart-
Key (Y page 93). 98
DoorsOpening and closing

X
Before starting off, adjust the rear-view mir-
ror and the exterior mirrors in such a way
that you have a good view of road and traf-
fic conditions (Y page 141).
X Vehicles with a memory function: save
the seat, steering wheel and exterior mirror settings with the memory function
(Y page 144). Seats
Important safety notes
G
WARNING
Children could become trapped if they adjust the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.
The seats can still be adjusted when there is
no SmartKey in the ignition lock. G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. G
WARNING
If you adjust the seat height carelessly, you or other vehicle occupants could be trapped andthereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment buttons and become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem. G
WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat. G
WARNING
If head restraints are not installed and adjus-
ted correctly, they cannot provide protection
as intended. There is an increased risk of
injury in the head and neck area, e.g. in the
event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level. G
WARNING
The seat belt does not offer the intended level of protection if you have not moved the back-
rest to an almost vertical position. When brak-
ing or in the event of an accident, you could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This
poses an increased risk of injury or even fatal injury.
Adjust the seat properly before beginning
your journey. Always ensure that the backrest
is in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
! To avoid damage to the seats and the seat
heating, observe the following information:
R keep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not be used to dry
the seats.
R clean the seat covers as recommended;
see "Interior care". Seats
121Seats, steering wheel and mirrors Z

You can exit the reclined position and
adjust the seat position by:
R calling up a stored position using mem-
ory buttons 1or 2(Y page 144)
R manually adjusting the seat to the
desired position (Y page 122).
i The steps for setting the reclined position
are not always carried out simultaneously.
The legrest folds down if overloaded. If this is
the case fold up the legrest and engage it. Adjusting the front-passenger seat
from the driver’s seat
Important safety notes G
WARNING
The front-air bags for could also injure the
vehicle occupants in the front If the front
seats are positioned too close to the dash-
board or steering wheel. This poses an
increased risk of injury or even fatal injury.
Always adjust the front seats so that they are
as far from the front air bags as possible. Also
observe the notes on the correct adjustment
of the seats. G
WARNING
Children could become trapped if they adjust the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle. G
WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
! Do not move the front-passenger seat
fully forwards if there are objects in the parcel net in the front-passenger footwell.
The objects could otherwise be damaged.
Adjusting the front-passenger seat X
To select the front-passenger seat:
press button :repeatedly until the indi-
cator lamp in the button lights up.
When the indicator lamp in button :lights
up, for the front-passenger seat you can
adjust:
R adjust the seat (Y page 122)
R seat heating (Y page 134)
R seat ventilation (Y page 136)
R the memory function to call up or save set-
tings (Y page 143). Adjusting the front-passenger seat
from the rear
Important safety notes G
WARNING
Children could become trapped if they adjust the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Neverleave children unsupervised in the vehicle.
The seats can still be adjusted when there is
no SmartKey in the ignition lock. 124
SeatsSeats, steering wheel and mirrors

G
WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
(Y page 56) and "Children in the vehicle"
(Y page 69). G
WARNING
The front-air bags for could also injure the
vehicle occupants in the front If the front
seats are positioned too close to the dash-
board or steering wheel. This poses an
increased risk of injury or even fatal injury.
Always adjust the front seats so that they are
as far from the front air bags as possible. Also
observe the notes on the correct adjustment
of the seats.
! Do not move the front-passenger seat
fully forwards if there are objects in the
parcel net in the front-passenger footwell.
The objects could otherwise be damaged.
i You can use the rear-compartment over-
ride button to disable the setting of the
front-passenger seat from the rear
(Y page 75).
Adjusting the rear seat :
Selects rear-compartment seat
; Head restraint height
= Head restraint fore-and-aft position ?
Backrest angle
A Combined seat cushion angle and length
B Combined seat cushion angle and length
X To select the rear seat: press button:
repeatedly until the indicator lamp in the
button is not lit.
The rear-compartment seat is selected if
the indicator lamp in the button is not lit.
X Adjust the rear seats with buttons ;toB.
Adjusting the front-passenger seat :
Selects the front-passenger seat
; Head restraint height
= Backrest angle
? Seat height
A Seat fore-and-aft adjustment
X To select the front-passenger seat:
press button :repeatedly until the indi-
cator lamp in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up.
X Adjust the front-passenger seat with but-
tons ;toA. Seats
125Seats, steering wheel and mirrors Z

Adjusting the rear seat on vehicles with
EASY ADJUST luxury head restraints :
Selects rear-compartment seat
; Head restraint height
= Head restraint fore-and-aft position
? Backrest angle
A Combined seat cushion angle and length
B Combined seat cushion angle and length
X To select the rear seat: press button:
repeatedly until the indicator lamp in the
button is not lit.
The rear-compartment seat is selected if
the indicator lamp in the button is not lit.
X Adjust the rear seat with buttons ;toB.
Adjusting the front-passenger seat on
vehicles with EASY ADJUST luxury head
restraints :
Selects the front-passenger seat
; Head restraint height
= Head restraint fore-and-aft position
? Backrest angle A
Seat height
B Seat fore-and-aft adjustment
X To select the front-passenger seat:
press button :repeatedly until the indi-
cator lamp in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up.
X Adjust the front-passenger seat with but-
tons ;toB.
EASY ADJUST luxury head restraints are avail-
able individually on vehicles equipped with a
rear compartment chauffeur/memory pack-
age.
Vehicles with seat for chauffeur mode
and long wheelbase Adjusting the rear seat
:
Selects rear-compartment seat
; Head restraint height
= Head restraint fore-and-aft position
? Backrest angle
A Combined seat cushion angle and length
B Combined seat cushion angle and length
C Longitudinal direction of the legrest if rear
reclining seat is installed
D Angle of the legrest if rear reclining seat is
installed
X To select the rear seat: press button:
repeatedly until the indicator lamp in the
button is not lit.
The rear-compartment seat is selected if
the indicator lamp in the button is not lit.
X Adjust the rear seats with buttons ;toD. 126
SeatsSeats
, steering wheel and mirrors

X
Insert head restraint :into the brackets.
The head restraint must engage on both
sides.
X Press down red pin =.
If the pin can be pressed down and is then
no longer visible, the head restraint has
engaged correctly.
X Fold covers ;forwards and close them.
The head restraint folds into position auto- matically.
Moving the front-passenger seat into
the normal position Adjusting from the rear compartment
You can use the override button to disable
this function (Y page 75).
The head restraint must be installed, in order for the front-passenger seat to be moved intothe normal position (Y page 129).
X To select the front-passenger seat:
press button :repeatedly until the indi-
cator lamp in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up.
X Press button =backwards and hold it in
this position.
The front-passenger seat moves into the
normal adjustment range at the threshold
of the area for chauffeur mode. The head
restraint folds into position.
If you continue to hold down button =, the
seat continues to move backwards. or
X Briefly press button ;backwards.
The front-passenger seat moves into the
normal adjustment range at the threshold
to the area for chauffeur mode. The head
restraint folds into position.
i Further settings are available via the
memory adjustment buttons, if:
R a position in the normal setting has
already been saved.
R the front-passenger seat has been selec-
ted with button :
Adjusting from the driver's seat The head restraint must be installed, in order
for the front-passenger seat to be moved into the normal position (Y page 129).
X To select the front-passenger seat:
press button :repeatedly until the indi-
cator lamp in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up.
X Press button =backwards and hold it in
this position.
The front-passenger seat moves into the
normal adjustment range at the threshold
of the area for chauffeur mode. The head
restraint folds into position.
If you continue to hold down button =, the
seat continues to move backwards.
or X Briefly press button ;backwards.
The front-passenger seat moves into the
normal adjustment range at the threshold 130
SeatsSeats, steering wheel and mirrors

to the area for chauffeur mode. The head
restraint folds into position.
i Further settings are available via the
memory adjustment buttons if the front-
passenger seat has been selected with but- ton :.
Adjusting from the front-passenger seat X Press any seat adjustment button.
The front-passenger seat moves into the
normal adjustment range at the threshold
of the area for chauffeur mode. The head
restraint folds into position.
Fully reclined position of the front-
passenger seat Adjusting
This function is only available on vehicles with
electrically adjustable rear seats.
You can move the front-passenger seat into a fully reclined position. The rear seat and front-
passenger seat then provide a continuous
surface.
To do so:
R move the seat cushion of the rear seat as
far back as possible in a longitudinal direc-
tion (Y page 123)
R move the front-passenger seat into posi-
tion for chauffeur mode (Y page 128)
R remove the front-passenger seat head
restraint (Y page 129)
R move the front-passenger seat so that the
backrest is in a fully reclined position
(Y page 122)
Exiting
To exit the fully reclined position:
R fold the backrest upright to a suitable posi-
tion
R install the head restraint (Y page 129) Adjusting the head restraints
Adjusting the front head restraints Important safety notes
G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. G
WARNING
If head restraints are not installed and adjus-
ted correctly, they cannot provide protection
as intended. There is an increased risk of
injury in the head and neck area, e.g. in the
event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level.
General notes
Pay attention to the important safety notes
(Y page 121).
Do not rotate the head restraints of the front
and rear seats. Otherwise, you cannot adjust
the height and angle of the head restraints to
the correct position. Seats
131Seats, steering wheel and mirrors Z

Problems with the seat heating
Problem
Possible causes/consequences and
M
MSolutions The seat heating has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers are switched on.
X Switch off electrical consumers that you do not need, such as
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating can be
switched back on manually. Switching the seat ventilation on/off
Front seats The three blue indicator lamps in the buttons
indicate the blower setting you have selected.
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 189).
X To switch on: press button:repeatedly
until the desired blower setting is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
ventilation may switch off.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature (Y page 107). The seat
ventilation of the driver's seat automati-
cally switches to the highest level.
i When the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noises of the seat ventilation. Rear seat
Switching the seat ventilation in the rear com-
partment on/off
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 189).
X To switch on: press button:repeatedly
until the desired blower setting is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
ventilation may switch off.
i When the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noises of the seat ventilation. 136
SeatsSeats, steering wheel and mirrors