2018 MERCEDES-BENZ SLC child lock

Brake fluid
Displa ym essage ............................ 184
Note s. ............................................ 293
Brake forc ed istribution
see EBD (electroni cb rake force
distribution)
Brake lamps
Adaptive ........................................... 60
Displa ym essage ............................ 189
Brakes
ABS .................................................. 57
Adaptive Brake Assist ...................... 59
BAS .................................................. 57
Brake fluid (notes) ......................... 293
Displa ym essage ............................ 179
EBD .................................................. 63
High-performance brake system .... 137
Important safety notes .................. 136
Maintenance .................................. 137
Parking brake ................................ 132
Riding tip s. ..................................... 136
Warning lamp ................................. 204
Breakdow na ssistance
Reflective safety jacke t. ................. 244
Where will If ind...? ........................ 244
see Fla tt ire
see Towing away
Brightness contro l( in strument
cluste rl ig hting) ................................... 32
Bulbs
see Replacing bulbs
C
California
Important notic ef or retail cus-
tomers and lessees .......................... 24
Calling up am alfunction
see Displa ym essages
Car
see Vehicle
Care
Ca rw as h. ....................................... 238
Exhaus tp ip e. ................................. 243
Exterior lights ................................ 242
Matte finish ................................... 240
Note s. ............................................ 238
Paint .............................................. 240 Power washe r. ............................... 239
Rear vie wc amera .......................... 242
Sensors ......................................... 242
Washing by hand ........................... 239
Wheel s. .......................................... 241
Window s. ....................................... 241
Wipe rb lade s. ................................. 241
CD
see also Digital Operator's Man-
ua l. ................................................. 211
CD player (on-board computer) ........ 169
Cente rc on sole
Lower section .................................. 35
Upper section .................................. 34
Central locking
Automati cl oc king (on-board com-
puter) ............................................. 173
Locking/unlocking (SmartKey ). ....... 65
Changin gb ulbs
Sid em arker lamps (rear) ............... 101
Child
Restraint system .............................. 55
Child seat
Forward-facing restraint system ...... 56
On the front-passenger sea t. ........... 55
Rearward-facing restraint system .... 56
Children
Specia ls ea tb el tr etractor ............... 54
Childre nint he vehicle
Important safety notes .................... 53
Cigarette lighter ................................ 223
Cleaning
Mirror turn signa l. .......................... 242
Climate control
Air-conditioning system ................. 104
Automati cc limate control (dual-
zone) .............................................. 106
Controlling automaticall y. .............. 109
Cooling with ai rd ehumidifica tion .. 108
Defrosting the window s. ................ 111
Defrosting the windshield .............. 110
Genera ln otes ................................ 104
Indicato rl am p. ............................... 109
Information abou tu si ng auto-
mati cc limate control ..................... 107
Ma xi mu mc ooling .......................... 111
Note sonu si ng the air-condition-
ing system ..................................... 1056
Index

Panic alarm X
To activate: press 3 button C for at
least one second.
Av isual and audible alarm is triggered if the
alarm system is armed. X
To deactivate: press 3 button C again.
or X
Insert the SmartKey into the ignition lock.
or X
Press the KEYLESS-GO Start/Stop button.
The KEYLESS-GO key must be in the vehicle.
Occupant safety
Introduction to the restraint system The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident.
The restraint system can also reduce the forces
to which vehicle occupants are subjected during
an accident.
The restraint system comprises: R
Seat belt system R
Air bags
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 41)R
have the seat and head restraint adjusted
properly ( Y
page 84)
As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position ( Y
page 84). You also have to make sure that an air bag can
inflate properly if deploye d( Y
page 43).
An air bag supplements ac orrectly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par-
ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against object sp enetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" ( Y
page 50).
See "Children in the vehicle" for information on
children traveling with you in the vehicle as well
as on child restraint systems ( Y
page 53).
Important safety notes
G WARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even
fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate ap erson with
disabilities, contact an authorized Mercedes-
Benz Center for details. USA only: for further
information contact our Customer Assistance
Center at 1-80 0F OR-MERCEDES
(1 ‑ 800 ‑ 367 ‑ 6372).
Mercedes-Benz recommends that you only use
driving aids which have been approved specifi-
cally for your vehicle by Mercedes-Benz.
Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at38
Occupant safety
Safety

occupant in the best position in relation to the
air bag.
The seat belt system comprises: R
Seat belts R
Emergency Tensionin gD evices and seat belt
force limiters
If the seat belt is pulled quickly or sharply by the
seat belt guide, the inertia reel locks. The belt
strap cannot be extracted any further.
The Emergency Tensionin gD evice tighten st he
seat belt in an accident ,p ulling the belt close
against the body. However it does not pull the
vehicle occupant back in the direction of the
backrest.
The Emergency Tensionin gD evice does not cor-
rect an incorrect seat position or the routing of
an incorrectly fastened seat belt.
When triggered, as eat belt force limiter helps to
reduce the force exerted by the seat belt on the
vehicle occupant.
The seat belt force limiters are synchronized
with the front air bags which absorb part of the
deceleration force. This can reduce the force
exerted on the vehicle occupant sd uring an acci-
dent.
! If the front-passenger seat is not occupied,
do not engage the seat belt tongue in the
buckle on the front-passenger seat. Other-
wise, in the event of an accident the Emer-
gency Tensionin gD evice and the side impact
air bag, in addition to other systems, may be
triggered and have to be replaced.
Important safety notes 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
Even where this is not required by law, all vehicle
occupant ss hould correctly fasten their seat
belts before starting the journey.
G WARNING
If the seat belt is not worn correctly, it cannot
perform its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci- dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
Always ensure that all vehicle occupant sh ave
their seat belts fastened correctly and are sit-
ting properly.
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 41) R
have the seat and head restraint adjusted
properly ( Y
page 84)
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 ,y ou 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 backrest
is in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
G WARNING
Persons less than 5ft( 1.50 m) tall cannot
wear the seat belt correctly without an addi-
tional and suitable restraint system. If the
seat belt is not worn correctly, it cannot per-
form its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
For this reason, alway ss ecure persons under
5ft( 1.50 m) tall in suitable additional restraint
systems.40
Occupant safety
Safety

The system does not deactivate: R
the side impact air bag R
the headbag R
the Emergency Tensionin gD evices
Requirements To be classified correctly, the front passenger
must sit: R
with the seat belt fastened correctly R
in an almost upright position with their back
against the seat backrest R
with their feet restin gont he floor, if possible
If the front passenger does not observe these
conditions, OCS may produce af alse classifica-
tion, e.g. because the front passenger: R
transfers their weight by supporting them-
selves on av ehicle armrestR
sits in such aw ay that their weight is raised
from the seat cushion
If you install ac hild restraint system on the
front-passenger seat, be sure to observe the
correc tp ositionin goft he child restraint system.
Never place object su nder or behind the child
restraint system, e.g. ac ushion. The entir eb ase
of the child restraint system must alway sr est on
the seat cushion of the front-passenger seat.
The backrest of the forward-facing 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 al oad by the head
restraint. Adjust the angle of the seat backrest
and the head restraint position accordingly.
Only then can OCS be guaranteed to function
correctly. Always observe the child restraint sys-
tem manufacturer's installation and operating
instructions. Occupant Classification System opera-
tion (OCS)
C
PASSENGER AIR BAG ON indicator lamp D
PASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether the
front-passenger front air bag is deactivated or
enabled. X
Press the Start/Stop button once or twice, or
turn the SmartKey to position G or H in the
ignition lock.
The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps must light up simul-
taneously for approximately six seconds.
The indicator lamps display the status of the
front-passenger front air bag. R
PASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF): the
front-passenger front air bag is able to deploy
in the event of an accident. R
PASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will
then not be deployed in the event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator
lamp shows the status of the front-passenger
front air bag. The PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
If the status of the front-passenger front air bag
changes while the vehicle is in motion ,ana ir bag
display message appears in the instrument clus-
ter ( Y
page 187). When the front-passenger
seat is occupied, alway sp ay attention to the
PASSENGER AIR BAG OFF indicator lamp. Be
aware of the status of the front-passenger front
air bag both before and during the journey.46
Occupant safety
Safety

G WARNING
If you leave children unsupervised in the vehi-
cle, they coul ds et it in motion by, for example:R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicl ee quip-
ment and become trapped. There is ar isk of
an accident and injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
If persons, particularl yc hildren are subjected
to prolonged exposure to extreme hea to r
cold, there is ar isk of injury ,p ossibly even
fatal .N ever 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,
particularl yont he metal parts of the child
restraint system. There is ar isk of injury.
If you leave the vehicle, taking the child with
you ,a lway se nsure that the child restraint
system is not expose dtod irect sunlight. Pro-
tect it with ab lanket, for example. If the child
restraint system has been expose dtod irect
sunlight, let it cool dow nb efore securing the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicl eo ccupants have
their seat belts fastened correctly and are sitting
properly .P articular attention must be pai dt o
children.
Observe the safety notes on the seat belt
( Y
pag e4 0) and the notes on correct use of seat
belts ( Y
pag e4 1).
Ab ooster seat may be necessary to achieve
prope rs eat bel tp ositioning for children over
40 lbs (18 kg )u ntil they reach ah eight where a three-point seat bel tc an be properly fastened
without ab ooster seat.
Special seatbelt retractor
G WARNING
If the seat bel tisr eleased while driving, the
child restraint system wil lnol onger be
secure dp roperly .T he special seat bel tr etrac-
tor is disable da nd the inertia real draw sina
portion of the seat belt. The seat bel tc annot
be immediatel yr efastened. There is an
increased risk of injury ,p ossibly even fatal.
Stop the vehicl ei mmediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat bel tr etractor and secure the
child restraint system properly.
The seat bel tont he front-passenger's side is
equipped with as pecial seat bel tr etractor.
When activated, the special seat bel tr etractor
ensure st hat the seat bel tc annot slacken once
the child seat is secured.
Installing ac hild restraint system: X
Make sure you observe the child restraint
system manufacturer's installation instruc-
tions. X
Pul lt he seat bel ts moothly out of the belt
loop. X
Engage seat bel tt ongue in bel tb uckle.
Activating the special seat bel tr etractor:X
Pul lt he seat bel to ut full ya nd let the inertia
reel retract it again.
Whil et he seat bel tisr etracting, you should
hear ar atcheting sound .T he special seat belt
retractor is enabled. X
Push the child restraint system dow nsot hat
the seat bel tist ight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat bel tr etractor:X
Make sure you observe the child restraint
system manufacturer's installation instruc-
tions. X
Press the release button of the seat belt
buckle ,h old the bel tt ongue and guide it back
toward st he bel tl oop.
The special seat bel tr etractor is deactivated.54
Children in the vehicle
Safety

instructions and safet yn otes on the "Occupant
Classification System (OCS)" ( Y
page 45).
You can thus avoid the risk st hat could arise as
ar esult of: R
an incorrectly categorized perso nint he front-
passenger seat R
the unintentional deactivatio noft he front-
passenger front air bag R
the unsuitable positionin goft he child
restraint system, e.g. too clos etot he dash-
board
Rearward-facing child restraint system If it is absolutely necessary to install ar earward-
facin gc hild restraint system on the front-
passenger seat, always make sure that the
front-passenge rf ront air bag is deactivated.
Only if the PASSENGER AI RB AG OFF indicator
lamp is permanently lit ( Y
page 39) is the front-
passenger front air bag deactivated.
Always observe the child restraint system man-
ufacturer' si nstallation and operating instruc-
tions.
Forward-facing child restraint system If you secur eac hild in af orward-facin gc hild
restraint system on the front-passenge rs eat,
always move the front-passenge rs eat as far
back as possible .T he entire base of the child
restraint system must always rest on the seat
cushio noft he front-passenge rs eat. 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 touc ht he roof or be subjected to al oad by
the head restraint .A djust the angle of the seat
backrest and the head restraint position accord-
ingly. Always make sure that the shoulder belt
strap is correctly routed fro mt he 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
fro mt he front-passenge rs eat belt guide.
Always observe the child restraint system man-
ufacturer' si nstallation and operating instruc-
tions. Pets in th ev ehicle
G WARNING
If you leave animals unattended or unsecured
in the vehicle, the yc ould press buttons or
switches, for example.
As ar esult ,t he yc ould: R
activat ev ehicle equipmen ta nd become
trapped, for example R
activat eord eactivat es ystems, thereby
endangerin go ther road users
Unsecure da nimals could also be flung around
the vehicle in the even tofana ccident or sud-
den steerin gorb raking, thereby injuring vehi-
cle occupants. There is ar isk of an accident
and injury.
Never leave animals unattended in the vehi-
cle. Always secur ea nimals properly during
the journey, e.g. use as uitable animal trans-
port box.
Driving safety systems
Overview of driving safety systems In this section, you will fin di nformation about
the followin gd rivin gs afet ys ystems:R
AB S( A nti-lock B raking S ystem)
( Y
page 57) R
BA S( B rake A ssist S ystem) ( Y
page 57)R
Activ eB rak eA ssist ( Y
page 58)R
Adaptive brak el ight s( Y
page 60)R
ESP ®
( E lectronic S tability P rogram)
( Y
page 60) R
EB D( E lectronic B ra ke force D istribution)
( Y
page 63) R
ADAPTIVE BRAKE ( Y
page 63)
Important safety notes
If you fail to adapt your drivin gs tyle or if you are
inattentive, the drivin gs afet ys ystems can nei-
the rr educ et he risk of an accident nor override
the laws of physics .D ri vin gs afet ys ystems are
merely aids designed to assist driving.56
Driving safety systems
Safety

SmartKey
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake R
shift the automatic transmission out of park
position PR
start the engine
There is ar isk of an accident and injury.
Never leave children or animals unattended in
the vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applie stom obile phones if the "Digital
Car Key in smartphone" function is activated
via the Mercedes me connect web app.
G WARNING
If you attach heavy or large object stot he
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a
risk of an accident.
Do not attach any heavy or large object stot he
SmartKey. Remove any bulky key rings before
insertin gt he SmartKey into the ignition lock.
! Keep the SmartKey away from stron gm ag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey: R
with electronic devices, e.g. am obile phone
or another SmartKey R
with metallic objects, e.g. coins or metal foil R
inside metallic objects, e.g. am etal case
This can affect the functionality of the Smart-
Key. SmartKey functions
C
7 Locks the vehicleD
T Unlock st he trunk lid

X
To restore the factory settings: press and
hol dd ow nt he 6 and 7 buttons simul-
taneousl yf or approximatel ys ix seconds until
the battery check lamp ( Y
page 68 )f lashes
twice.
Mechanical key
General notes If the vehicl ec an no longer be locked or
unlocke dw it ht he SmartKey or with KEYLESS-
GO ,u se the mechanical key.
If yo uu se the mechanical key to unlock and
open the driver's door or the trunk lid, the anti-
thef ta la rm system will be triggered .S witch off
the alarm ( Y
page 64).
Removing the mechanical key
X
Push release catch C in the direction of the
arrow and at the same time remove mechan-
ica lk ey D from the SmartKey.
For further informatio na bout :R
unlocking the driver's door ( Y
page 72)R
unlocking the trunk ( Y
page 73)R
locking the vehicl e( Y
page 72)
Insertin gt he mechanical keyX
Push mechanical key D completel yi nto the
SmartKey unti lite ngages and release
catch C is back in its basi cp osition. SmartKey battery
Important safety notes
G WARNING
Batterie sc ontain toxi ca nd corrosive substan-
ces. If batteries are swallowed, it can resul ti n
severe health problems .T here is ar is koff atal
injury.
Kee pb at teries ou toft he reach of children. If
ab at tery is swallowed, see km edica la ttention
immediately.
H Environmental note
Batterie sc ontain pollu-
tants .Itisi llegal to dispose
of them with the household
rubbish. The ym us tbec ol-
lected separatel ya nd dis-
posed of in an environmen-
tally responsibl er ecycling
system.
Dispose of batteries in an
environmentally responsi-
bl em an ner. Take dis-
charge db at teries to aq uali -
fie ds pecialist workshop or
to ac ollectio np oi nt for
used batteries.
The SmartKey batteries contain perchlorate
material ,w hi ch ma yr equire specia lh an dling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia ,s ee www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
Mercedes-Benz recommends tha ty ou have the
batteries replaced at aq uali fied specialist work-
shop. SmartKey 67
Opening and closing Z