2019 MERCEDES-BENZ SLC ECU

passenger front air bag both before and duringthe journey.
GWARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag
is disabled. It will not be deployed in the
event of an accident and cannot perform its
intended protective function. A person in the
front-passenger seat could then, for exam-
ple, come into contact with the vehicle's
interior, especially if the person is sitting too
close to the dashboard. This poses an
increased risk of injury or even fatal injury.
When the front-passenger seat is occupied,
always ensure that:
Rthe classification of the person in the
front-passenger seat is correct and the
front-passenger front air bag is enabled or
disabled in accordance with the person in
the front-passenger seat
Rthe front-passenger seat has been moved
back as far back as possible.
Rthe person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front air bag is correct.
GWARNING
If you secure a child in a rearward-facing
child restraint system on the front-
passenger seat and the PASSENGER AIR
BAG OFF indicator lamp is off, the front-
passenger front air bag can deploy in the
event of an accident. The child could be
struck by the air bag. This poses an
increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been deactivated. The PASSENGER
AIR BAG OFF indicator lamp must be lit.
NEVER use a rearward-facing child restraint
on a seat protected by an ACTIVE FRONT
AIRBAG in front of it; DEATH or SERIOUS
INJURY to the child can occur.
If the PASSENGER AIR BAG OFF indicator lampstays off, do not install a rearward-facing child
restraint system on the front-passenger seat.You can find more information on OCS under"Problems with the Occupant ClassificationSystem" (Ypage 49).
GWARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat
too close to the dashboard, in the event of
an accident, the child could:
Rcome into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
Rbe struck by the air bag if the
PASSENGER AIR BAG OFF indicator lamp
is off
This poses an increased risk of injury or
even fatal injury.
Move the front-passenger seat as far back
as possible. Always make sure that the
shoulder belt strap is correctly routed from
the vehicle belt guide to the shoulder belt
guide on the child restraint system. The
shoulder belt strap must be routed forwards
and downwards from the vehicle belt guide.
Always observe the child restraint system
manufacturer's installation instructions.
If OCS determines that:
RThe front-passenger seat is unoccupied, thePASSENGER AIR BAG OFF indicator lamplights up after the self-test and remains lit.This indicates that the front-passenger frontair bag is deactivated.
RThe front-passenger seat is occupied by achild of up to twelve months old, in a stand-ard child restraint system, the PASSENGERAIR BAG OFF indicator lamp lights up afterthe self-test and remains lit. This indicatesthat the front-passenger front air bag isdeactivated.
But even in the case of a twelve-month-oldchild, in a standard child restraint system,the PASSENGER AIR BAG OFF indicatorlamp can go out after the self-test. This indi-cates that the front-passenger front air bagis activated. The result of the classificationis dependent on, among other factors, thechild restraint system and the child's stat-
Occupant safety47
Safety
Z

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.
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.
Always ensure that all vehicle occupants havetheir seat belts fastened correctly and are sit-ting properly. Particular attention must be paidto children.
Observe the safety notes on the seat belt(Ypage 40) and the notes on correct use ofseat belts (Ypage 41).
A booster seat may be necessary to achieveproper seat belt positioning for children over
40 lbs (18 kg) until they reach a height wherea three-point seat belt can be properly fas-tened without a booster seat.
Special seatbelt retractor
GWARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt
retractor 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. Reacti-
vate the special seat belt retractor and
secure the child restraint system properly.
The seat belt on the front-passenger's side isequipped with a special seat belt retractor.When activated, the special seat belt retractorensures that the seat belt cannot slacken oncethe child seat is secured.
Installing a child restraint system:
XMake sure you observe the child restraintsystem manufacturer's installation instruc-tions.
XPull the seat belt smoothly out of the beltloop.
XEngage seat belt tongue in belt buckle.
Activating the special seat belt retractor:
XPull the seat belt out fully and let the inertiareel retract it again.While the seat belt is retracting, you shouldhear a ratcheting sound. The special seatbelt retractor is enabled.
XPush the child restraint system down so thatthe seat belt is tight and does not loosen.
54Children in the vehicle
Safety

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, hold the belt tongue and guide itback towards the belt loop.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
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.
Further information on stowing objects, lug-gage and loads securely can be found under“Stowing options/stowage compartments”(Ypage 225).
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 system of child restraint systemsis the seat belt system.
iIf you install a child restraint system onthe front passenger seat, be sure to observethe instructions and safety notes on the"Occupant Classification System (OCS)"(Ypage 46). There you will also find infor-mation on disabling the front passengerfront air bag.
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-
Children in the vehicle55
Safety
Z

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.
Child restraint system on the front-
passenger seat
General notes
If you install a child restraint system on thefront-passenger seat, always observe theinstructions and safety notes on the "Occu-pant Classification System (OCS)" (Ypage 46).
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 39),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 you secure a child in a forward-facing childrestraint system on the front-passenger seat,always move the front-passenger seat as farback as possible. The entire base of the childrestraint system must always rest on the seatcushion of the front-passenger seat. The back-rest of the child restraint system must lie asflat as possible against the backrest of thefront-passenger seat. The child restraint sys-tem must not touch the roof or be subjectedto a load by the head restraint. Adjust theangle of the seat backrest and the head
restraint position accordingly. Always makesure that the shoulder belt strap is correctlyrouted from the front-passenger seat beltguide to the shoulder belt guide on the childrestraint system. The shoulder belt strap mustbe routed forward and down from the front-passenger seat belt guide.
Always observe the child restraint systemmanufacturer's installation and operatinginstructions.
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.
Driving safety systems
Overview of driving safety systems
In this section, you will find information aboutthe following driving safety systems:
RABS (Anti-lockBrakingSystem)(Ypage 57)
RBAS (BrakeAssistSystem) (Ypage 57)
RActive Brake Assist (Ypage 58)
RAdaptive brake lights (Ypage 60)
RESP®(ElectronicStabilityProgram)(Ypage 60)
56Driving safety systems
Safety

Automatic locking feature
XTo deactivate:press and hold buttonCforabout five seconds until a tone sounds.
XTo activate:press and hold buttonDforabout five seconds until a tone sounds.
If you press one of the two buttons and do nothear a tone, the relevant setting has alreadybeen selected.
The vehicle is locked automatically when theignition is switched on and the wheels areturning.
You could therefore lock yourself out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on a roller dynamometer.
You can also switch the automatic lockingfunction on and off using the on-board com-puter (Ypage 178).
Unlocking/locking the driver's door
using the mechanical key
iIf you want to centrally lock the vehicleusing the mechanical key, begin by pressingthe locking button for the interior lockingmechanism while the driver's door is open.Then lock the driver's door using themechanical key.
XTo unlock:turn the mechanical key coun-ter-clockwise as far as it will go to positionG.
XTo lock:turn the mechanical key clockwiseas far as it will go to positionG.
If you use the mechanical key to unlock andopen the driver's door, the anti-theft alarmsystem will be triggered. Switch off the alarm(Ypage 64).
Trunk
Important safety notes
GWARNING
If objects, luggage or loads are not secured
or not secured sufficiently, they could slip,
tip over or be flung around and thereby hit
vehicle occupants. There is a risk of injury,
particularly in the event of sudden braking
or a sudden change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards whenopened. Therefore, make sure that there issufficient clearance above the trunk lid.
!Only close the trunk once the roof is low-ered completely. Otherwise, you could dam-age the roof.
If you close the trunk lid before the roof islowered completely, the loading aid switchlights up and a warning tone sounds.
Trunk73
Opening and closing
Z

"Digital Vehicle Key" function is activated via
Mercedes me connect. Never leave children
unsupervised in the vehicle.
The seats can still be adjusted when there isno SmartKey in the ignition lock.
GWARNING
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.
When adjusting a seat, make sure that no
one has any body parts in the sweep of the
seat.
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 43) 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
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.
GWARNING
If the head restraints are not installed or not
adjusted correctly, they cannot provide pro-
tection 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.
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.
!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,
86Seats
Seats, steering wheel and mirrors

EASY-ENTRY/EXIT feature
Important safety notes
GWARNING
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.
GWARNING
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.
If somebody becomes trapped:
Rpress one of the memory function posi-
tion buttons, or
Rmove the switch for steering wheel
adjustment in the opposite direction to
that in which the steering wheel is mov-
ing.
The adjustment process is stopped.
GWARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel and the driver's seat, 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 seat and
the steering wheel.
If somebody becomes trapped:
Rpress one of the memory function posi-
tion buttons, or
Rpress one of the memory function mem-
ory buttons, or
Rmove the switch for steering wheel
adjustment in the opposite direction to
that in which the steering wheel is moving
The adjustment process is stopped.
GWARNING
If you use openings in the bodywork or
detachable parts as steps, you could:
Rslip and/or fall
Rdamage the vehicle and cause yourself to
fall.
There is a risk of injury.
Always use secure climbing aids, e.g. a suit-
able ladder.
The EASY-ENTRY/EXIT feature makes gettingin and out of your vehicle easier.
You can activate and deactivate the EASY-ENTRY/EXIT feature in the on-board computer(Ypage 178).
Position of the steering wheel when
the EASY-ENTRY/EXIT feature is active
The steering wheel swings up when you:
Rremove the SmartKey from the ignition lock
Ropen the driver's door with KEYLESS-GO inposition1
Ropen the driver's door and the SmartKey isin position

XAttach housing coverCand turn it clock-wise until it engages.
XReplace the cover in the front wheel housing(Ypage 102).
High-beam headlamps (halogen head-
lamps)/cornering lamps (Bi-Xenon
headlamps)
XSwitch off the lights.
XOpen the hood.
XTurn housing coverCcounter-clockwiseand pull it out.
XAt the bulb holder, push the bulb upwards,disconnect it and pull it out of bulbholderD.
XInsert the new bulb into bulb holderDatthe top, push it down and secure it in place.
XAttach housing coverCand turn it clock-wise until it engages.
Side marker lamps (halogen head-
lamps)
Due to their location, have the bulbs in theside marker lamp changed at a qualified spe-cialist workshop.
Windshield wipers
Switching the windshield wipers
on/off
!Do not operate the windshield wiperswhen the windshield is dry, as this coulddamage the wiper blades. Moreover, dustthat has collected on the windshield canscratch the glass if wiping takes place whenthe windshield is dry.
If it is necessary to switch on the windshieldwipers in dry weather conditions, always usewasher fluid when operating the windshieldwipers.
!If the windshield wipers leave smears onthe windshield after the vehicle has beenwashed in an automatic car wash, wax orother residues may be the reason for this.Clean the windshield using washer fluidafter washing the vehicle in an automaticcar wash.
!Intermittent wiping with rain sensor: dueto optical influences and the windshieldbecoming dirty in dry weather conditions,the windshield wipers may be activatedinadvertently. This could then damage thewindshield wiper blades or scratch the wind-shield.
For this reason, you should always switchoff the windshield wipers in dry weather.
Combination switch
G?Windshield wiper off
HbIntermittent wipe, low (rain sensorset to low sensitivity)
IcIntermittent wipe, high (rain sensorset to high sensitivity)
J