
Removing the child restraint system and deac-tivating the special seat belt retractor:
XMake sure you observe the child restraintsystem manufacturer's installation instruc-tions.
XPress the release button of the seat beltbuckle and guide the seat belt tongue backtowards the belt sash guide.The special seat belt retractor is deactiva-ted.
Child restraint system
The use of seat belts and child restraint sys-tems is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadian provinces
If you install a rearward-facing child restraintsystem on the center rear seat, the rear seatarmrest must be folded back as far as it willgo.
You can obtain further information about thecorrect child restraint system from any author-ized Mercedes-Benz Center.
GWARNING
If the child restraint system is installed
incorrectly on a suitable seat, it cannot pro-
tect 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
instructions and the notes on use. Please
ensure, that the base of the child restraint
system is always resting completely on the
seat cushion. Never place objects, e.g. cush-
ions, under or behind the child restraint sys-
tem. Only use child restraint systems with
the original cover designed for them. Only
replace damaged covers with genuine cov-
ers.
GWARNING
If the child restraint system is installed
incorrectly 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, striking 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 stowingobjects, luggage or loads under "Loadingguidelines" (Ypage 250).
GWARNING
Child restraint systems or their securing sys-
tems which have been damaged or subjec-
ted to a load in an accident can no longer
protect as intended. The child cannot then
be restrained in the event of an accident,
heavy braking or sudden changes of direc-
tion. 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
securing systems on the child restraint sys-
tem checked at a qualified specialist work-
shop, before you install a child restraint sys-
tem again.
The securing systems of child restraint sys-tems are:
Rthe seat belt system
Rthe LATCH-type (ISOFIX) securing rings
Rthe Top Tether anchorages
If it is absolutely necessary to carry a child onthe front passenger seat, be sure to observethe information on the "Occupant Classifica-tion System (OCS)" (Ypage 47). There you willalso find information on disabling the frontpassenger front air bag.
Children in the vehicle55
Safety
Z

All child restraint systems must meet the fol-lowing standards:
RU.S. Federal Motor Vehicle Safety Standards213 and 225
RCanadian Motor Vehicle Safety Standards213 and 210.2
Confirmation that the child restraint systemcorresponds to the standards can be found onan instruction label on the child restraint sys-tem. This confirmation can also be found inthe installation instructions that are includedwith the child restraint system.
Observe the warning labels in the vehicle inte-rior and on the child restraint system.
LATCH-type (ISOFIX) child seat
securing system
GWARNING
For LATCH-type (ISOFIX) child restraint sys-
tems in which the child is secured using the
safety belt integrated in the child restraint
system, the maximum permissible weight of
the child and child restraint system together
is 73 lbs (33 kg).
If the child and the child restraint system
together weigh more than 73 lbs (33 kg), the
LATCH-type (ISOFIX) child restraint system
with integrated safety belt no longer offers
sufficient protection. The LATCH-type (ISO-
FIX) child seat securing system may be over-
loaded, and the child may not be restrained
in an accident, for example. This poses an
increased risk of injury or even fatal injury.
If the child and the child restraint system
together weigh more than 73 lbs (33 kg),
use only a LATCH-type (ISOFIX) child
restraint system in which the child is also
secured with the vehicle seat belt. Also
secure the child restraint system with the
Top Tether belt, if available.
Regularly check that the permissible grossweight of the child together with the childrestraint system is still maintained.
Always comply with the manufacturer's instal-lation and operating instructions for the childrestraint system used.
Before every trip, make sure that the LATCH-type (ISOFIX) child restraint system is engagedcorrectly in both LATCH-type (ISOFIX) securingrings
!When installing the child restraint system,make sure that the seat belt for the middleseat does not get trapped. The seat beltcould otherwise be damaged.
XInstall the LATCH-type (ISOFIX) childrestraint system on both LATCH-type (ISO-FIX) securing rings C.
LATCH-type (ISOFIX) is a standardized secur-ing system for specially designed childrestraint systems on the rear seats. LATCH-type (ISOFIX) securing rings for two LATCH-type (ISOFIX) child restraint systems are instal-led on the left and right of the rear seats.
Non-LATCH-type (ISOFIX) child seats may alsobe used and can be installed using the vehi-cle's seat belt system. Install the child seataccording to the manufacturer's instructions.
Top Tether
Introduction
Top Tether provides an additional connectionbetween the child restraint system securedwith a LATCH-type (ISOFIX) system and thevehicle. This helps reduce the risk of injuryeven further. If the child restraint system isequipped with a Top Tether belt, this shouldalways be used.
Important safety notes
GWARNING
If the rear seat backrests are not locked,
they could fold forwards in the event of an
56Children in the vehicle
Safety

accident, heavy braking or sudden changes
of direction. As a result, child restraint sys-
tems cannot perform their intended protec-
tive function. Rear seat backrests that are
not locked can also cause additional inju-
ries, e.g. in the event of an accident. This
poses an increased risk of injury or even
fatal injury.
Always lock rear seat backrests after instal-
ling a Top Tether belt. Observe the lock veri-
fication indicator. Adjust the rear seat
backrests so that they are in an upright posi-
tion.
If the rear backrest is not engaged and locked,the red lock verification indicator will be visible(Ypage 254).
Top Tether anchorages
The Top Tether anchorages are located on therear side of the seat backrests.
Vehicles with adjustable head restraints:
XMove head restraint Cup.
XRoute Top Tether belt

you install the child restraint system on a rearseat.
If it is absolutely necessary to install a childrestraint system on the front-passenger seat,always observe the instructions and safetynotes on the "Occupant Classification System(OCS)" (Ypage 47).
You can thus avoid the risks that could ariseas a result of:
Ran incorrectly categorized person in thefront-passenger seat
Rdeactivating the front passenger front airbag unintentionally
Rthe unsuitable positioning of the childrestraint system, e.g. too close to the dash-board
Rearward-facing child restraint system
If circumstances require you to secure a childin a rearward-facing child restraint system onthe front-passenger seat, always make surethat the front passenger front air bag is deacti-vated. Only if the PASSENGER AIR BAG OFFindicator lamp is lit continuously (Ypage 40),is the front passenger front air bag deactiva-ted.
Always observe the child restraint systemmanufacturer's installation and operatinginstructions.
Forward-facing child restraint system
If it is absolutely necessary to install aforward-facing child restraint system on thefront-passenger seat, always move the front-passenger seat as far back as possible. Fullyretract the seat cushion length. The entirebase of the child restraint system must alwaysrest on the seat cushion of the front-passenger seat. The backrest of the childrestraint system must lie as flat as possibleagainst the backrest of the front-passengerseat. The child restraint system must nottouch the roof or be subjected to a load by thehead restraint. Adjust the angle of the seatbackrest and the head restraint positionaccordingly. Always make sure that the shoul-der belt strap is correctly routed from the vehi-cle belt outlet to the shoulder belt guide onthe child restraint system. The shoulder beltstrap must be routed forward and down fromthe vehicle belt outlet. If necessary, adjust the
vehicle belt outlet and the front-passengerseat accordingly.
Always observe the child restraint systemmanufacturer's installation and operatinginstructions.
Child-proof locks
Important safety notes
GWARNING
If children are traveling in the vehicle, they
could:
Ropen doors, thus endangering other peo-
ple or road users
Rexit the vehicle and be caught by oncom-
ing traffic
Roperate vehicle equipment and become
trapped
There is a risk of an accident and injury.
Always activate the child-proof locks and
override feature if children are traveling in
the vehicle. When leaving the vehicle,
always take the key with you and lock the
vehicle. Never leave children unattended in
the vehicle.
Override feature for:
Rthe rear doors (Ypage 59)
Rthe rear side windows (Ypage 59)
GWARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
Rrelease the parking brake.
Rshift the automatic transmission out of
the parking positionP.
Rstart 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.
58Children in the vehicle
Safety

GWARNING
If persons, particularly children are subjec-
ted to prolonged exposure to extreme heat
or cold, there is a risk of injury, possibly
even fatal. Never leave children unattended
in the vehicle.
GWARNING
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.
Protect it with a blanket, for example. If the
child restraint system has been exposed to
direct sunlight, let it cool down before secur-
ing the child in it. Never leave children unat-
tended in the vehicle.
Child-proof locks for the rear doors
You secure each door individually with thechild-proof locks on the rear doors. A doorsecured with a child-proof lock cannot beopened from inside the vehicle. When the vehi-cle is unlocked, the door can be opened fromthe outside.
XTo activate:press the child-proof lock leverup in the direction of arrow C.
XMake sure that the child-proof locks areworking properly.
XTo deactivate:press the child-proof locklever down in the direction of arrow D.
Override feature for the rear side win-
dows
XTo activate/deactivate:press button C.If indicator lamp Dis lit, operation of therear side windows is disabled. Operation isonly possible using the switches in the driv-er's door. If indicator lamp Dis off, opera-tion is possible using the switches in therear compartment.
Pets in the vehicle
GWARNING
If you leave animals unsupervised or unse-
cured in the vehicle, they may press buttons
or switches, for instance.
In this way, animals may:
Ractivate vehicle equipment and become
trapped, for example
Rswitch systems on or off and thereby
endanger other road users
Furthermore, unsecured animals may be
flung around inside the vehicle in the event
of an accident or abrupt steering or braking
maneuver, and thereby injure vehicle occu-
pants. There is a risk of accident and injury.
Never leave animals unattended in the vehi-
cle.
Always secure animals properly when driv-
ing, for instance with a suitable pet carrier.
Pets in the vehicle59
Safety
Z

GWARNING
If the driver's seat is not engaged, it could
move forwards as far as the next catch dur-
ing movement such as braking or abrupt
changes of direction. As a result, you would
be pushed against your seat belt by the
unsecured driver's seat.
This could cause you to lose control of the
vehicle. The seat belt cannot protect as
intended and could result in additional
injury.
There is a risk of an accident and injury.
Before every journey, make sure that the
driver's seat is fully engaged.
Observe the safety notes on "Air bags"(Ypage 44) and "Children in the vehicle"(Ypage 53).
GWARNING
If the driver's seat is not engaged, it could
move unexpectedly while the vehicle is in
motion. This could cause you to lose control
of the vehicle. There is a risk of an accident.
Always make sure that the driver's seat is
engaged before starting the vehicle.
GWARNING
You could lose control of your vehicle if you
do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
GWARNING
If you adjust the seat height carelessly, you
or other vehicle occupants could be trapped
and thereby injured. Children in particular
could accidentally press the electrical seat
adjustment 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
system.
!To prevent damage to the seats and theseat heating, observe the following notes:
RDo not spill liquids onto the seats. Dry theseats as soon as possible if liquid doesget spilled on the seats.
RIf the seat covers are damp or wet, do notswitch on the seat heating. Also, do notuse the seat heating to dry the seats.
RClean the seat covers as recommended;see the "Interior care" section.
RDo not transport heavy loads on theseats. Do not place pointed objects onthe seat cushions such as knives, nails ortools. Where possible, use the seats onlyfor carrying passengers.
RWhen operating the seat heating, do notcover the seats with insulating materials,e.g. blankets, coats, bags, protective cov-ers, child seats or booster seats.
RWhen the seat heating is switched on, theseat surface can be damaged as a resultof objects being placed on the seats, forexample, seat cushions, child seats andprotective covers not approved byMercedes-Benz.
!Make sure that there are no objects in thefootwell under or behind the seats whenmoving the seats back. There is a risk thatthe seats and/or the objects could be dam-aged.
iFurther related subjects:
RCargo compartment enlargement (foldingdown the rear seats) (Ypage 253)
Seats93
Seats, steering wheel and mirrors
Z

The three red indicator lamps in the buttonindicate the heating level you have selected.
The system automatically switches down fromlevel3to level2after approximately eightminutes.
The system automatically switches down fromlevel2to level1after approximately tenminutes.
The system automatically switches off approx-imately 20 minutes after it is set to level1.
XTurn the SmartKey to position Gor Hinthe ignition lock (Ypage 125).
XTo switch on:press button Crepeatedlyuntil the desired heating level is set.
XTo switch off:press button Crepeatedlyuntil all the indicator lamps go out.
iIf the battery voltage is too low, the seatheating may switch off.
Problems with the seat heating
ProblemPossible causes/consequences and P PSolutions
The seat heating hasswitched off prema-turely or cannot beswitched on.
The on-board voltage is too low because too many electrical con-sumers are switched on.
XSwitch off electrical consumers that you do not need, such as therear window defroster or interior lighting.Once the battery is sufficiently charged, the seat heating willswitch back on automatically.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you
do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
Never leave children unsupervised in the
vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies for the Digital Vehicle Key if the
"Digital Vehicle Key" function is activated via
Mercedes me connect.
Adjusting the steering wheel
GWARNING
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.
Steering wheel97
Seats, steering wheel and mirrors
Z