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
three-point seat belt can be properly fastened
without a booster seat. Special seatbelt retractor
G
WARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt retrac- tor is disabled and the inertia real draws in a
portion of the seat belt. The seat belt cannot
be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat belt retractor and secure the
child restraint system properly.
The seat belt on the front-passenger's side is
equipped with a special seat belt retractor.
When activated, the special seat belt retractor
ensures that the seat belt cannot slacken once
the child seat is secured.
Installing a child restraint system:
X Make sure you observe the child restraint
system manufacturer's installation instruc-
tions.
X Pull the seat belt smoothly out of the seat belt
guide.
X Engage seat belt tongue in belt buckle.
Activating the special seat belt retractor: X Pull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat belt
retractor is enabled.
X Push the child restraint system down so that
the seat belt is tight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat belt retractor:
X Make sure you observe the child restraint
system manufacturer's installation instruc-
tions.
X Press the release button of the seat belt
buckle and route the seat belt tongue towards
the seat belt guide.
The special seat belt retractor is deactivated. Child restraint system
The use of seat belts and child restraint systems
is required by law in:
R all 50 states
R the U.S. territories
R the District of Columbia
R all Canadian provinces G
WARNING
If the child restraint system is installed incor- rectly on a suitable seat, it cannot protect as
intended. The child cannot then be restrained in the event of an accident, heavy braking or
sudden changes of direction. There is an
increased risk of injury, possibly even fatal.
Make sure that you observe the child restraint
system manufacturer's installation instruc-
tions and the notes on use. Please ensure,
that the base of the child restraint system is
always resting completely on the seat cush-
ion. Never place objects, e.g. cushions, under or behind the child restraint system. Only use
child restraint systems with the original cover
designed for them. Only replace damaged
covers with genuine covers. G
WARNING
If the child restraint system is installed incor- rectly or is not secured, it can come loose in
the event of an accident, heavy braking or a
sudden change in direction. The child
restraint system could be thrown about, strik- ing vehicle occupants. There is an increased
risk of injury, possibly even fatal.
Always install child restraint systems prop-
erly, even if they are not being used. Make
sure that you observe the child restraint sys-
tem manufacturer's installation instructions.
You will find further information on stowing
objects, luggage or loads under "Loading guide-
lines" (Y page 218). G
WARNING
Child restraint systems or their securing sys-
tems which have been damaged or subjected to a load in an accident can no longer protect 56
Children in the vehicleSafety
as intended. The child cannot then be
restrained in the event of an accident, heavy
braking or sudden changes of direction. There is an increased risk of injury, possibly even
fatal.
Replace child restraint systems which have
been damaged or subjected to a load in an
accident as soon as possible. Have the secur-
ing systems on the child restraint system
checked at a qualified specialist workshop,
before you install a child restraint system
again.
The securing system of child restraint systems is the seat belt system.
If you install a child restraint system on the front
passenger seat, be sure to observe the instruc-
tions and safety notes on the "Occupant Clas-
sification System (OCS)" (Y page 48). There you
will also find information on disabling the front
passenger front air bag.
All child restraint systems must meet the fol-
lowing standards:
R U.S. Federal Motor Vehicle Safety Standards
213 and 225
R Canadian Motor Vehicle Safety Standards
213 and 210.2
Confirmation that the child restraint system cor- responds to the standards can be found on an
instruction label on the child restraint system.
This confirmation can also be found in the instal-
lation instructions that are included with the
child restraint system.
Observe the warning labels in the vehicle inte-
rior and on the child restraint system. Child restraint system on the front
passenger seat
General notes If you install a child restraint system on the
front-passenger seat, always observe the
instructions and safety notes on the "Occupant
Classification System (OCS)" (Y page 48).You can thus avoid the risks that could arise as
a result of:
R an incorrectly categorized person in the front-
passenger seat
R deactivating the front passenger front air bag
unintentionally
R the unsuitable positioning of the child
restraint system, e.g. too close to the dash-
board
Rearward-facing child restraint system If circumstances require you to secure a child in
a rearward-facing child restraint system on the
front-passenger seat, always make sure that the front passenger front air bag is deactivated.
Only if the PASSENGER AIR BAG OFF indicator
lamp is lit continuously (Y page 41), is the front
passenger front air bag deactivated.
Always observe the child restraint system man- ufacturer's installation and operating instruc-
tions.
Forward-facing child restraint system If you secure a child in a forward-facing child
restraint system on the front-passenger seat,
always move the front-passenger seat as far
back as possible. The entire base of the child
restraint system must always rest on the seat
cushion of the front-passenger seat. The back-
rest of the child restraint system must lie as flat
as possible against the backrest of the front-
passenger seat. The child restraint system must
not touch the roof or be subjected to a load by
the head restraint. Adjust the angle of the seat
backrest and the head restraint position accord- ingly. Always make sure that the shoulder belt
strap is correctly routed from the front-
passenger seat belt guide to the shoulder belt
guide on the child restraint system. The shoul-
der belt strap must be routed forward and down
from the front-passenger seat belt guide.
Always observe the child restraint system man-
ufacturer's installation and operating instruc-
tions. Children in the vehicle
57Safety 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
0043
To raise the backrest contour
0044 To soften the backrest contour
0087 To lower the backrest contour
0085 To harden the backrest contour Adjusting the AMG Performance Seat
General notes To adjust the contour of the seat and for
improved lateral support, you can individually
adjust the front seats.
The AMG Performance seat is designed for the
standard three-point seat belt. If you install
another multi-point seat belt, e.g. sport or racing
seat belts, the restraint system cannot provide
the best level of protection.
For further information about the seat belt
(Y page 43)
Adjusting the side bolsters of the seat
cushion and the seat backrest Driver's seat Side bolsters of the seat cushion
X To narrow: press button 0043.
X To broaden: press button0044.
Side bolsters of the seat backrest X To narrow: press button 0087.
X To broaden: press button0085.
Front-passenger seat Side bolsters of the seat backrest
X To narrow: press button 0043.
X To broaden: press button0044.
i The side bolsters of the front-passenger
seat cushion cannot be adjusted. Seat heating and seat ventilation
Switching the seat heating on/off G
WARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to high temperatures may be
affected or they may even suffer burn-like
injuries. There is a risk of injury.
Therefore, do not switch the seat heating on
repeatedly.
! When the seat heating is switched on, the
seat surface can be damaged as a result of
objects being placed on the seats, for exam-
ple, seat cushions, child seats and protective
covers not approved by Mercedes-Benz.
Ensure that there are no objects on the seat
surface when the seat heating is switched on. Seats
87Seats, steering wheel and mirrors Z
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