
If the seat belt pre-tensioning is not reduced:
X Move the seat backrest or seat back slightly
when the vehicle is stationary.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. Informa-
tion about the convenience function can be
found under "Belt adjustment" (Y page 44).Automatic measures after an acci-
dent
Immediately after an accident, the following
measures are implemented, depending on the
type and severity of the impact:
R the hazard warning lamps are switched on
R the emergency lighting is activated
R the vehicle doors are unlocked
R the front side windows are lowered
R vehicles with a memory function: the electri-
cally adjustable steering wheel is raised when
the driver's door is opened
R the engine is switched off and the fuel supply
is cut off
R vehicles with Mercedes me connect: auto-
matic emergency call Children in the vehicle
Important safety notes
If a child younger than twelve years old and
under 5 ft (1.50 m) in height is traveling in the
vehicle: R always secure the child in a child restraint
system suitable for Mercedes-Benz vehicles.
The child restraint system must be appropri-
ate to the age, weight and size of the child.
R be sure to observe the instructions and safety
notes in this section in addition to the child
restraint system manufacturer's installation
instructions.
R always observe the instructions and safety
notes on the "Occupant classification system
(OCS)". (Y page 48) G
WARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion, for example by:
R releasing the parking brake
R shifting the transmission to the neutral
position
R starting the engine
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle. G
WARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. G
WARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularly on the metal parts of the child
restraint system. There is a risk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to direct sunlight. Pro- tect it with a blanket, for example. If the child
restraint system has been exposed to direct
sunlight, let it cool down before securing the
child in it. Never leave children unattended in the vehicle.
Always ensure that all vehicle occupants have
their seat belts fastened correctly and are sitting properly. Particular attention must be paid to
children.
Observe the safety notes on the seat belt
(Y page 42) and the notes on correct use of seat
belts (Y page 43).
A booster seat may be necessary to achieve
proper seat belt positioning for children over
40 lbs (18 kg) until they reach a height where a Children in the vehicle
55Safety Z

Correct driver's seat position
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. Observe the following when adjusting steering
wheel
0043, seat belt 0044and driver's seat 0087:
R you are as far away from the driver's air bag as
possible
R you are sitting in a normal upright position
R your thighs are slightly supported by the seat
cushion
R your legs are not entirely stretched and you
can depress the pedals properly
R the back of your head is supported at eye level
by the center of the head restraint
R you can hold the steering wheel with your
arms slightly bent
R you can move your legs freely R
you can see all the displays in the instrument
cluster clearly
R you should have a good overview of traffic
conditions
R the seat belt is pulled snugly against your
body and is routed across the center of your
shoulder and across your hips in the pelvic
area
Further related subjects:
R Manual seat adjustment (Y page 85)
R Electrical seat adjustment (Y page 86)
R Fastening the seat belt correctly (Y page 44).
R Adjusting the rear-view mirror and exterior
mirrors (Y page 92)
R Storing seat settings, steering wheel and
exterior mirrors using the memory function
(Y page 94) 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. Neverleave children unsupervised in the vehicle.
The seats can still be adjusted when there is no
SmartKey in the ignition lock. 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 45) and "Children in the vehicle"
(Y page 55). 84
SeatsSeats, steering wheel and
mirrors

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.
For safety reasons, seat fore-and-aft adjustment on electrically adjustable seats is only possible
for a maximum of two seconds when the vehicleis in motion. The seat fore-and-aft adjustment
can then no longer be set. 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
If head restraints are not adjusted 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.
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.
Using the fore-and-aft adjustment, adjust the
head restraint so that it is as close as possible to your head. 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 backrestis in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
! To prevent damage to the seats and the seat
heating, observe the following notes:
R Do not spill liquids onto the seats. Dry the
seats as soon as possible if liquid does get
spilled on the seats.
R If the seat covers are damp or wet, do not
switch on the seat heating. Also, do not use
the seat heating to dry the seats.
R Clean the seat covers as recommended;
see keyword "Care".
R Do not transport heavy loads on the seats.
Do not place pointed objects on the seat
cushions such as knives, nails or tools.
Where possible, use the seats only for car-
rying passengers.
R When operating the seat heating, do not
cover the seats with insulating materials,
e.g. blankets, coats, bags, protective cov-
ers, child seats or booster seats.
! Make sure that there are no objects in the
footwell under or behind the seats when mov- ing the seats back. There is a risk that the
seats and/or the objects could be damaged. Adjusting the seats manually
General notes The manually adjustable seat is only available in
Canada. Seats
85Seats, steering wheel and mirrors Z

Adjusting the seat fore-and-aft position
X
Lift handle 0043and slide the seat forwards or
backwards.
X Release lever 0043again.
Make sure that you hear the seat engage in
position.
Backrest angle X
Relieve the pressure on the backrest.
X Pull lever 0087up and adjust the backrest to the
desired angle.
X Release lever 0087again.
The seat backrest must audibly engage.
Seat height X
Pull up or push down lever 0044repeatedly until
the seat has reached the desired height. Adjusting the seats electrically
0043
Seat cushion angle
0044 Seat height
0087 Backrest angle
0085 Seat fore-and-aft adjustment For safety reasons, seat fore-and-aft adjustment
on electrically adjustable seats is only possible
for a maximum of two seconds when the vehicleis in motion. The seat fore-and-aft adjustment
can then no longer be set.
i If after starting the journey no correct seat
fore-and-aft adjustment has been made,
there is a risk of accident and injury. Pull over and stop the vehicle safely as soon as possi-
ble and readjust the seat position.
i Further related subjects:
R You can store the seat settings using the
memory function (Y page 94).
R If PRE-SAFE ®
is triggered, the front-
passenger seat will be moved to a better
position if it was previously in an unfavora- ble position (Y page 54). Adjusting the head restraints
X
To raise: pull the head restraint up to the
desired position.
X To lower: push the head restraint down to the
desired position.
i The head restraint can only be adjusted on
manually and electrically adjustable seats,
but not with AMG Performance Seats. Adjusting the lumbar support
You can adjust the contour of the seat backrests
individually to provide optimum support for your back. 86
SeatsSeats
, steering wheel and mirrors

Problems with AIRSCARF
Problem
Possible causes/consequences and
0050
0050Solutions AIRSCARF has switched
off prematurely or will
not switch on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
X Switch on AIRSCARF again. Steering wheel
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 the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is a risk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion. G
WARNING
Children could injure themselves if they
adjust the steering wheel. 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 electrically adjustable steering wheel can
still be adjusted when there is no SmartKey in
the ignition lock. Adjusting the steering wheel
0043
Adjusts the steering wheel height
0044 Adjusts the steering wheel position (fore-
and-aft adjustment)
i Further related subjects:
R EASY-ENTRY/EXIT feature (Y page 90)
R Storing settings (Y page 94) EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the EASY-ENTRY/EXIT feature is mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
Move the steering wheel adjustment lever if
there is a risk of entrapment by the steering
wheel. The adjustment process is stopped. 90
Steering wheelSeats, steering wheel and mirrors

Press one of the memory function position but-
tons. The adjustment process is stopped. This
function is only available on vehicles with mem-
ory function. G
WARNING
If children activate the EASY-ENTRY/EXIT fea- ture, they can become trapped, 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
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is a risk of an
accident.
Always wait until the adjustment process is
complete before driving off.
The EASY-ENTRY/EXIT feature makes getting in
and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature using the multimedia sys-
tem (see the Digital Operator's Manual)
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings up when you:
R remove the SmartKey from the ignition lock
R open the driver's door with the Start/Stop
button in position 0047
i The steering wheel only moves up if it has
not already reached the upper stop.
Position of the steering wheel for driv-
ing The steering wheel is moved to the previously
set position if you:
R close the driver's door and
R press the Start/Stop button once
When you close the driver's door with the igni-
tion switched on, the steering wheel is also
automatically moved to the previously set posi- tion.
The last position of the steering wheel column is
stored after each manual setting or when you store the setting with the memory function
(Y
page 94).
Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is trig-
gered in an accident, the steering column will
move upwards in the following situations:
R when you open the driver's door
R when you remove the key
This makes it easier to exit the vehicle and res-
cue the occupants. Mirrors
Inside rearview mirror
X
Anti-glare mode: flick anti-glare lever 0043for-
wards or back. Exterior mirrors
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. Mirrors
91Seats, steering wheel and mirrors Z

X
Select key position 0048with the Start/Stop
button.
X Press button 0087.
X Use button 0085to adjust the exterior mirror to
a position that allows you to see the rear
wheel and the curb.
X Press memory button M0043 and one of the
arrows on button 0085within three seconds.
The parking position is stored if the exterior
mirror does not move.
X If the mirror moves out of position, repeat the
steps.
Calling up a stored parking position set- ting X
Select key position 0048with the Start/Stop
button.
X Adjust the exterior mirror on the front-
passenger side using button 0087.
X Start the engine.
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger side
moves back to its original position:
R as soon as you exceed a speed of 9 mph
(15 km/h)
R about ten seconds after you have disengaged
reverse gear
R if you press button 0044for the exterior mirror
on the driver's side Memory function
Important safety notes
G
WARNING
If you use the memory function on the driver's side while driving, you could lose control of
the vehicle as a result of the adjustments
being made. There is a risk of an accident.
Only use the memory function on the driver's
side when the vehicle is stationary. G
WARNING
When the memory function adjusts the seat or steering wheel, you and other vehicle occu- pants – particularly children – could become
trapped. There is a risk of injury.
While the memory function is making adjust-
ments, make sure that no one has any body
parts in the sweep of the seat or steering
wheel. If somebody becomes trapped, imme- diately release the memory function position
button. The adjustment process is stopped. G
WARNING
Children could become trapped if they acti-
vate the memory function, 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 memory function can be used at any time,
even if the ignition is switched off. Storing settings
With the memory function, you can store up to
three different settings, e.g. for three different
people.
The following settings are stored as a single
memory preset:
R seat and backrest position
R driver's side: position of the exterior mirrors
on the driver's and front-passenger sides X
Select key position 0048with the Start/Stop
button.
X Adjust the seat accordingly (Y page 86).94
Memory functionSeats, steering wheel and mirrors

X
On the driver's side, adjust the steering wheel
(Y page 90) and the exterior mirrors
(Y page 92).
X Press memory button Mand one of the stor-
age position buttons 1,2or 3within three
seconds.
The settings are stored in the selected preset position. A tone sounds when the settings
have been completed. Calling up a stored setting
X Press and hold the corresponding storage
position button 1,2or 3until:
R Seat
R Steering wheel
R Exterior mirrors
are in the stored position.
i The steering wheel and seat adjustment
procedure is interrupted as soon as you
release the storage position button. Exterior
mirror adjustment continues. Memory function
95Seats, steering wheel and mirrors Z