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77 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexVehicles without seat ventilation function:
Normal heating mode:
Press button (1).
One indicator lamp in the switch lights up.
The seat heater will be automatically switched off after
approximately 30 minutes.
Rapid heating mode:
Press button (2).
Both indicator lamps in the switch light up.
The system switches over to normal heating mode
automatically after approximately 5 minutes.
Turning off the heater:
Press button (1) or (2) again.
The indicator lamps go out. The seat heater is switched
off.
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78 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Vehicles with seat ventilation function:
Rapid heating mode:
Press button (3) once.
Both red indicator lamps above the button light up.
The system switches over to normal heating mode
automatically after approximately 5 minutes.
Normal heating mode:
Press button (3) twice.
One red indicator lamp above the button lights up.
The seat heater will be automatically switched off after
approximately 30 minutes.
Turning off the heater:
Press the button (3) again.
The indicator lamps go out. The seat heater is switched
off.
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Page 82 of 424
79 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Seat ventilation system
The buttons are located on each door.
Seat ventilation can be activated manually with the
electronic key in starter switch positions 1 or 2, or by
the summer opening function, see page 45.
Notes:
When in operation, the seat ventilation system
consumes a large amount of electrical power. It is not
advisable to use the seat ventilator longer than
necessary.The seat ventilators may automatically switch off if too
many power consumers are switched on at the same
time or if the battery charge is low. In this case, one or
more indicator lamps will blink.
The seat ventilation switch back on again automatically
as soon as sufficient voltage is available.
If the blinking of the indicator lamps is distracting to
you, the seat ventilators can be switched off.
The maximum ventilation level (level 3) is automatically
selected if the driver’s seat ventilation is activated by
the summer opening function, see page 45.
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80 Seats
Te ch n ica l
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cluster displayPractical hints Car care Index
Manual activation:
Turn the electronic key in starter switch to position 1
or 2.
Level 3 ventilation setting (maximum):
Press button (1).
Three blue indicator lamps above the button light up.
The level of ventilation is decreased one step
approximately every 10 minutes.Level 2 ventilation setting (middle):
Press button (1) again.
Two blue indicator lamps above the button light up.
Level 1 ventilation setting (minimum):
Press button (1) again.
One blue indicator lamp above the button lights up.
Turning off the seat ventilation:
Press button (1) again.
The indicator lamps go out. The seat ventilation is
switched off.
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Page 84 of 424
81 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Power head restraints, rear
The switches are located on the front and rear center
console.
Turn electronic key in starter switch to position 1 or 2.
Activate switch:
1Place head restraints upright.
2Fold head restraints backward.Important!
For safety reasons, always drive with the rear head
restraints in the upright position when the rear seats
are occupied.
Keep the area around head restraints clear of articles
(e.g. clothing) to not obstruct the folding operation of
the head restraints.
Notes:
Both head restraints fold up or back together.
The head restraints will position themselves
automatically when the seats are occupied (seat belt
buckled).
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82 Restraint systems
Te ch n ica l
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cluster displayPractical hints Car care Index
Seat belts and integrated restraint system
Your vehicle is equipped with seat belts for all seats,
emergency tensioning retractors, dual front airbags,
side impact airbags for driver, front and rear
passengers, and head protective window curtain
airbags. Their protective functions are designed to
complement one another.
Seat belts
Important!
Laws in most states and all Canadian provinces require
seat belt use.
All states and provinces require use of child restraints
that comply with U.S. Federal Motor Vehicle Safety
Standard 213 and Canadian Motor Vehicle Safety
Standard 213.
All child restraints systems are designed to be secured
in vehicle seats by lap belts or the lap belt portion of a
lap-shoulder belt.
For your safety and that of your passengers we strongly
recommend their use.
Wa r n i n g !
Children 12 years old and under must never ride in
the front seat, except in a Mercedes-Benz
authorized BabySmart
TM compatible child seat,
which operates with the BabySmart
TM system
installed in the vehicle to deactivate the passenger
side front airbag when it is properly installed.
Otherwise they will be struck by the airbag when it
inflates in a crash. If this happens, serious or fatal
injury will result.
According to accident statistics, children are safer
when properly restrained in the rear seating
positions than in the front seating positions.
Infants and small children must ride in back seats
and be seated in an appropriate infant or child
restraint system, which is properly secured with
the vehicle’s seat belt, fully in accordance with the
child seat manufacturer’s instructions.A child’s risk of serious or fatal injuries is
significantly increased if the child restraints are
not properly secured in the vehicle and the child is
not properly secured in the child restraint.
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83 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexSeat belt nonusage warning system
With the electronic key in starter switch position 2, a
warning sounds for a short time if the driver’s seat belt
is not fastened.
Automatic comfort-fit seat belt:
An automatic comfort-fit feature for driver and front
passenger seat belt is activated when the electronic key
in the starter switch is turned to position 1 or 2.
The retraction force of the inertia reel is reduced,
increasing the level of seat belt comfort.
Note:
For cleaning and care of the seat belts see page 382.
Wa r n i n g !
The seat belts provide protection only with the
backrest locked in place. Do not drive the vehicle
when the backrest is not locked in place. If the
warning message “SEAT BACKREST LEFT – LOCK!”
or “SEAT BACKREST RIGHT – LOCK!” is displayed
in the multifunction display, then the respective
backrest is not engaged in its lock. For backrest see
page 72.Never ride in a moving vehicle with the backrest
reclined. Sitting in an excessively reclined position
can be dangerous. You could slide under the seat
belt in a collision. If you slide under it, the belt
would apply force at the abdomen or neck. That
could cause serious or even fatal injuries. The
backrest and seat belt provide the best restraint
when the wearer is in an upright position and the
belt is properly positioned on the body.
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84 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Wa r n i n g !
Failure to wear and properly fasten and position
your seat belt greatly increases your risk of
injuries and their likely severity in an accident.
You and your passengers should always wear seat
belts.If you are ever in an accident, your injuries can be
considerably more severe without your seat belt
properly buckled. Without your seat belt buckled,
you are much more likely to hit the interior of the
vehicle or be ejected from it. You can be seriously
injured or killed.In the same crash, the possibility of injury or death
is lessened if you are wearing your seat belt.
Wa r n i n g !
Never let more people ride in the vehicle than there
are seat belts available. Be sure everyone riding in
the vehicle is correctly restrained with a separate
seat belt.
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