2017 MERCEDES-BENZ SLC brake

Active Brak eA ssist
Gene ra li nf orm ation
i Observ et he "Importan ts afet yn otes "s ec -
tion ( Y
page 54).
Active Brake Assis tc onsists of ad istanc ew arn -
ing function wit hana utonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assis tc an help you to minimiz et he
ris kofac ol lision wit ht he vehicl einf ront or
reduce th ee ffects of suc hac ol lision .
If Active Brake Assis td etects that there is ar is k
of collision ,y ou will be warned visually and
acoustically. If you do no tr eac ttot he visual and
audible collision warning ,a utonomous braking
can be initiate dinc riti cal situations. If you apply
th eb rak ey ourself in ac riti cal situation ,A da p-
tive Brake Assis toft he Active Brake Assis ts ys-
te ms upport sy ou.
Import ant safety notesIn particular, th ed etection of obstacles can be
impaire di f:R
there is dir tont he sensor sora nythin ge lse
covering th es ensor sR
there is snow or heav yr ainR
there is interferenc ebyo th er radar source sR
there are stron gr adar reflections, for exam-
ple in parking garages R
an arrow vehicl eist ra veling in front, e.g. a
motorbik eR
av ehicl eist ra veling in fron tonad ifferen tl in eR
ne wv ehicles or after servicing is carrie do ut
on th eA ctiv eB ra ke Assis ts ystem
Observ et he important safet yn otes in th e
"Breaking-in notes" section ( Y
page 114).
Followin gd amag etot he fron te nd of th ev ehicle,
hav et he configuration and operation of th e
radar sensor checke dataq ualified specialis t
workshop .T his also applie stoc ol lision sats low
speeds wher et he re is no visible damag etot he
fron toft he vehicle.
Activating/deactivating
Active Brake Assis tisa utomatically active after
switching on th ei gnition .
You can activat eord eactivat eA ctiv eB ra ke
Assis tu sin gt he on-board computer
( Y
page 171). When deactivated, th ed istanc e warning function and th ea utonomous braking
function are also deactivated.
If Active Brake Assis tisd eactivated, th e

Important safety notes
G WAR NING
Adaptive Brake Assist canno ta lways clearly
iden tif yo bj ect sa nd co mple xt ra ff ic situa-
tions.
In suc hc ases, Adaptive Brake Assist can:R
interven eu nnecessar ilyR
no ti ntervene
Ther eisar is kofana cc iden t.
Always pay careful attentio ntot he traff ic sit-
uation and be read yt ob rake. Terminate the
interventio ninan on-cri tical driv ing situation.
G WAR NING
Adaptive Brake Assist does no tr eact:R
to peop le or animalsR
to oncomin gv eh icle sR
to crossing traff icR
when cornering
As ar esult, th eA da pt ive Brake Assist may not
interven eina ll critical conditions. Ther eisa
ris kofana cc iden t.
Always pay careful attentio ntot he traff ic sit-
uation and be read yt ob rake.
Due to th en ature of th es ystem, particularly
co mpli cated but non-critical driv ing conditions
may also caus eB ra ke Assist to intervene.
If adaptive Brake Assist is no ta vailab le due to a
malfunctio nint he radar sensor system, the
brak es ystem remains availab le wit hf ull brake
boostin ge ffect and BA S.
ESP ®
(Electronic Stability Program)
General notes
i Observ et he "Im portan ts afety notes" sec-
tio n( Y
page 54).
ESP ®
monitors driving st abilit ya nd traction ,i .e.
power transmission between th et ir es and the
road surface.
If ESP ®
detect st ha tt he veh icle is deviating from
th ed irection desired by th ed river, on eorm ore
wheel sa re braked to st abiliz et he veh icle .T he
engin eo utput is also mod ifie dtok ee pt he veh i- cle on th ed esired course within physical limits.
ESP ®
assists th ed river when pullin ga way on
wet or slippery roads. ESP ®
can also stabilize
th ev ehicle durin gb raking.
ETS (Electronic Traction System)
i Observ et he "Importan ts afety notes" sec-
tio n( Y
page 54).
ET St ra ction control is part of ESP ®
.
ET Sb rakes th ed riv ew heel si nd ivid ually if they
spin .T his enables you to pull away and acceler-
ate on slippery surfaces, for example if th er oad
surface is slippery on on es ide .Ina ddit ion ,m ore
driv et or que is transferred to th ew heel or
wheel sw it ht ra ction.
ET Sr emains active when you deactivate ESP ®
.
Important safety notes
G WARNING
If ESP ®
is malfunctioning, ESP ®
is unab le to
stabiliz et he vehicle .A dd it ionally, further driv-
ing safety systems are deactivate d. This
increases th er is kofs ki ddin ga nd an accident.
Drive on carefully. Hav eE SP ®
checked at a
qualified specialist workshop.
When to win gt he vehicle wit ht he rear axle
raised, observ et he note sonE SP ®
( Y
page 252).
If the

SmartKey
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position PR
Start the engine.
There is ar isk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
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

Problem
Possible causes/consequences and P Solutions
The engine cannot be
started using the Smart-
Key. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work: X
Check the starter battery and charge it if necessary ( Y
page 248).
or X
Jump-start the vehicle ( Y
page 249).
or X
Consult aq ualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. The vehicle is locked. X
Unlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 66) and replace it if necessary
( Y
page 66).
If this does not work: X
Start your vehicle with the SmartKey in the ignition lock.
There is interference from ap owerful source of radio waves.X
Start your vehicle with the SmartKey in the ignition lock.
You have lost aS mart-
Key. X
Have the SmartKey deactivated at aq ualified specialist workshop.X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
Doors
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment. Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position P R
Start the engine.
There is ar isk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.68
Doors
Opening and closing

Note sonb reaking-in an ew vehicle
Important safety notes Th es en so rs ys te mofs om ed riving and driving
safety systems adjusts automaticall yw hile a
certai nd is tance is being driven after the vehicle
ha sb ee nd elivere dora ft er repairs. Full system
effectiveness is not reache du nti lt he end of this
teach-i np rocedure.
New and replaced brake pads and discs only
reach their optimum braking effect after several
hundred kilometers of driving. Compensate for
thi sb ya pplyin gg reate rf orce to the brake pedal.
The first 1000 miles (150 0k m)Th em or ey ou look after the engine when it is
new ,t he mor es at isfied yo uw il lbew it hi ts per-
formance in the future. R
Yo us houl dt herefore drive at varying vehicle
and engine speeds for the first 1,000 miles
(1,500 km). R
Avoi dh eavy loads, e.g .d riving at full throttle,
during thi sp eriod.R
Chang eg ea ring oo dt ime, befor et he tach-
ometer needl ei s

Where possible, avoid spinnin gt he drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
SmartKey positions
SmartKey
Z
To remove the SmartKeyG
Power supply for some consumers, such as
the windshield wipersH
Ignition (power supply for all consumers)
and drive positionI
To start the engine
i The SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignition is not switched on.
The engine cannot be started.
KEYLESS-GO
General notes Vehicles with KEYLESS-GO are equipped with a
SmartKey featuring an integrated KEYLESS-GO
start function and ad etachable Start/Stop but-
ton.
The Start/Stop button must be inserted in the
ignition lock and the SmartKey must be in the
vehicle.
When you insert the Start/Stop button into the
ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in
succession corresponds to the differen tk ey
positions in the ignition lock. This is only the
case if you are not depressing the brake pedal. If you depress the brake pedal and press the
Start/Stop button ,t he engine start si mmedi-
ately.
Ac heck which periodically establishes ar adio
connection between the vehicle and the Smart-
Key determines whether av alid SmartKey is in
the vehicle. This occurs ,f or example, when
starting the engine.
To start the vehicle without actively using the
SmartKey: R
the Start/Stop button must be inserted in the
ignition lock. R
the SmartKey must be in the vehicle. R
the vehicle must not be locked with the
SmartKey or KEYLESS-GO ( Y
page 63).
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 impair the functionality of the KEY-
LESS-GO key.
If you lock the vehicle with the SmartKey's
remot ec ontrol or with KEYLESS-GO, after a
short time: R
you will not be able to switch on the ignition
with the Start/Stop button. R
you will not be able to start the engine with the
Start/Stop button until the vehicle is
unlocked again.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with KEYLESS-GO
C
Start/Stop button
D
Ignition lock Driving 115
Driving and parking Z

As soo na st he ignition is switched on, al lt he
indicator lamps in the instrument cluster light
up .F urther informatio nons it uations where an
indicator lamp either fails to go ou ta fte rs tarting
the engine or lights up whil ed riving
( Y
page 204).
If Start/Stop button C ha sn ot ye tb ee n
pressed, thi sc orrespond stot he key being
remove df rom the ignition.X
To switc hont he power supply: press
Start/Stop button C once.
The powe rs uppl yiss wi tched on. Yo uc an now
activate the windshield wipers, for example.
The powe rs uppl yiss wi tched off agai ni f:R
the driver's door is opene da ndR
yo up ress Start/Stop button C twice when
in thi sp ositionX
To switc hont he ignition: press Start/Stop
button C twice.
The ignition is switched on.
If yo up ress Start/Stop button C once when
in thi sp osit ion, the ignition is switched off
again.
Removing the Start/Sto pb uttonYo uc an remove the Start/Stop button from the
ignition lock and start the vehicl easn ormal
using the SmartKey. X
Remove Start/Stop button C from ignition
lock D .
Yo udon ot have to remove the Start/Stop but-
ton from the ignition lock when yo ul eave the
vehicle. Yo us hould, however, always take the
SmartKe yw it hy ou when leaving the vehicle. As
long as the Sma rtKe y isint h
e vehicle:R
the vehicl ec an be started using the Start/
Stop button R
the electrically powered equipment can be
operated Starting the engine
Important safety notes
G WARNING
If children ar el ef tu nsupervised in the vehicle,
they could: R
open the doors ,t hu se ndangering other
people or roa du se rs.R
ge to ut and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicl ei n
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission ou to f
park position P R
Star tt he engine.
There is ar is kofana ccident and injury.
Whe nl eavi ng the vehicle, always take the
SmartKe yw it hy ou and lock the vehicle. Never
leav ec hildren or animals unattended in the
vehicle. Alway sk ee pt he SmartKe yo ut of
reach of children.
G WARNING
Combustion engine se mi tp oiso nou se xhaust
gases such as carbo nm onoxide. Inhaling
thes ee xhaus tg as es lead stop oiso ning. There
is ar is koff ata li njury .T herefore neve rl eave
the engine running in enclose ds paces with-
ou ts uf ficient ventilation.
G WARNING
Flammabl em at erial si ntroduced through
environmenta li nfluence or by animals can
ignite if in contact with the exhaus ts ys tem or
parts of the engine tha th ea tu p. There is ar isk
of fire.
Carry ou tr egular checks to make sure that
ther ea re no flammabl ef oreig nm at erial si n
the engine compartment or in the exhaust
system.
During ac ol ds tart, the engine runs at higher
speed stoe nabl et he catalytic converter to116
Driving
Driving an dp arking

reach its operating temperature. The sound of
the engine may change during this time.
Automatic transmission X
Depress the brake peda la nd keep it
depressed. X
Shift the transmission to position P .
Transmission position display P is shown in
the multifunction display.
i You can start the engine in transmission
position P and N .
Starting procedure with the SmartKey To start the engine using the SmartKey instead
of KEYLESS-GO, pul lt he Start/Stop button out
of the ignitio nl ock.X
Turn the SmartKey to position 3 in the ignition
lock ( Y
pag e1 15) and release it as soon as the
engine is running.
Usin gK EYLE SS-GO to start the engineThe Start/Stop button can be used to start the
vehicl em anually withou ti nserting the SmartKey
into the ignitio nl ock. The Start/Stop button
must be inserted in the ignitio nl ock and the
SmartKey must be in the vehicle. This mode for
starting the engine operates independently of
the ECO start/stop automatic engine start func-
tion. X
Depress the brake peda la nd keep it
depressed. X
Press the Start/Stop button once
( Y
pag e1 15).
The engine starts.
Pulling away
General notes
G WARNING
If the engine spee disa bove the idling speed
and you engage transmission position D or R ,
the vehicl ec ould pul la wa ys uddenly .T here is
ar isk of an accident.
When engaging transmission position D or R ,
alway sf irmly depress the brake peda la nd do
not simultaneously accelerate. ! Change gea ring ood time and avoi ds pin-
ning the wheels. You could otherwise damage
the vehicle.
Depress the accelerator carefully when pulling
away.
The vehicl el ocks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the insid eata ny
time.
You can als od eactivate the automatic locking
feature ( Y
pag e1 73).
It is only possible to shift the transmission from
position P to the desired position if you depress
the brake pedal. Only then is the shift lock
released.
i Upshifts take place at highe re ngine speeds
after ac old start. This help st he catalytic con-
verter to reach its operating temperature
more quickly.
Information on the automatic release of the
electric parking brake ( Y
pag e1 33).
Hill start assist Hill start assist help sy ou when pulling awa yf or-
ward sorinr everse on an uphill gradient. It holds
the vehicl ef or as hort time after you have
removed you rf oot from the brake pedal. This
gives you enoug ht ime to move you rf oot from
the brake peda ltot he accelerator peda la nd to
depress it before the vehicl eb egins to roll.
G WARNING
After as hort time, hill start assist wil lnol on-
ger brake you rv ehicl ea nd it could roll away.
There is ar isk of an accident and injury.
Therefore, quickly move you rf oot from the
brake peda ltot he accelerator pedal. Never
leave the vehicl ew hen it is held by hill start
assist.
Hill start assist is not active if: R
you are pulling awa yonal evel road or on a
downhill gradient. R
the transmission is in position N .R
the electric parking brake is applied. R
ESP ®
is malfunctioning. Driving 117
Driving and parking Z