2018 MERCEDES-BENZ SLC ROADSTER ESP

The daytime runninglamps improve the visibility
of your vehicle during the day. To do this, the
daytime runnin glamps function must be
switched on using the on-board computer
(
Ypage 172).
If the engine is runnin gand you turn the light
switch to TorL,t he manual settings
take precedenceo ver the daytime running
lamps.
Low-beam headlamps
GWARNING
When the light switch is set to Ã,the low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There is arisk of an
accident.
In such situations, turn the light switch to
L.
Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on and the light switch is set to the Lposition.
This is aparticularly useful function in the event
of rain and fog.
XTo switch on the low-beam headlamps:
turn the SmartKey to position 2in the igni-
tion lock or start the engine.
XTurn the light switch to L.
The green Lindicator lamp in the instru-
ment cluster lights up.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take noteoft he country-specific
regulations for the use of rear fog lamps.
XTo switch on the rear fog lamp: turn the
SmartKey to position 2in the ignition lock or
start the engine.
XTurn the light switch to LorÃ.
XPress the Rbutton.
The yellow Rindicator lamp in the instru-
ment cluster lights up.
XTo switch off the rear fog lamp: press the
R button.
The yellow Rindicator lamp in the instru-
ment cluster goes out.
Parking lamps
!If the battery charge is very low, the parking
lamps or standin glamps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and in awell lit
area, in accordanc ewith the relevant legal
stipulations. Avoid using the Tparking
lamps over aperiod of several hours. If pos-
sible, switch on the right-hand Xor left-
hand W standin glamps.
XTo switch on: turn the light switch to T.
The green Tindicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standin glamps ensures the
corresponding side of the vehicle is illuminated.
XTo switch on the standing lam ps:the
SmartKey is not in the ignition lock or it is in
position uin the ignition lock.
XTurn the light switch to W(left-han dside of
the vehicle) or X(right-hand side of the
vehicle).
Combination switch
:High-beam headlamps
;Turn signal, right
=High-beam flasher
?Turn signal, left
XTo indicate briefly: press the combination
switch briefly to the pressure point in the
direction of arrow ;or?.
The corresponding turn signal flashes three
times.
XTo indicate: press the combination switch
beyond the pressure point in the direction of
arrow ;or?.
96Exterior lighting
Lights and windshield wipers

XTo switchonthe high-beam headlamps:
turn the light switch to LorÃ.
XPress the combinatio nswitch beyond the
pressure point in the direction of arrow :.
In the Ãposition, the high-bea mhead-
lamps are onlys witched on when it is dark and
the engine is running.
The blue Kindicator lamp in the instru-
ment cluster lights up when the high-beam
headlamps are switched on.
XTo switc hoff the high-beam headlamps:
move the combinatio nswitch back to its nor-
malp osition.
The blue Kindicator lamp in the instru-
ment cluster goe sout.
Hazard warning lamps
XTo switc honthe hazard warning lamps:
press button :.
All turn signals flash. If yo unow switch on a
turn signalu sing the combinatio nswitch ,only
the turn signall ampont he corresponding
side of the vehicl ewillf lash.
XTo switc hoff the hazard warning lamps:
press button :.
The hazard warning lamps automaticall yswitch
on if:
Ran ai rbag is deployed or
Rthe vehicl edecelerates rapidly from aspeed
of above 45 mph (70 km/h )and comestoa
standstill
The hazard warning lamps switch off automati-
cally if the vehicl ereachesas peed of above
6m ph (10 km/h )again afteraf ullb rake appli-
cation.
iThe hazard warning lamps stil lope rate if the
ignition is switched off.
Cornerin glight function
The cornering light functio nimprovest he illu-
minatio nofthe roado veraw idea ngle in the
direction yo uare turning, enabling better visi-
bility in tight bends, for example. The cornering
light functio ncan onlybea ctivatedwhent he
low-bea mheadlamps are switched on.
Active:
Rif yo uare driving at speed sbelow 25 mph
(40 km/h )and switch on the turn signalo r
turn the steering wheel
Rif yo uare driving at speed sbetween 25 mph
(40 km/h )and 45 mph (70 km/h )and turn
the steering wheel
The cornering lamp mayr emainlitfor ashort
time ,but is automaticall yswitched off afte rno
more thant hreeminutes.
Cornerin glight functio nwitht rafficc ircle
function:
The cornering light functio nisa ctivate donboth
side sbefore entering atraffic circle throug han
evaluation of the current GP Sposition of the
vehicle. It remains active unti lafte rthe vehicle
hasl eftt he traffic circle .Inthisw ay,pedes trians
crossing the road, for example, are illuminated
by your vehicl eingoodt ime.
Active light function
The active light functio nisas ystem thatm oves
the headlamps according to the steering move-
ments of the front wheels .Inthisw ay,relevant
areas remai nillum inated whil edriving .This
allows yo utorecognize pedestrians ,cyclists
and animals sooner.
Active: when the lights are switched on.
Vehicles with Lane Keeping Assist: the active
light functio nevaluate sthe course of the lane in
which yo uare driving and pre-emptively con-
trolst he active light function.
Adaptiv eHighbeam Assist
General notes
Yo uc an us ethisf unctio ntoset the headlamps
to change between lo wbeama nd high beam
automatically. The system recognizes vehicles
with thei rlights on, either approaching from the
opposite direction or traveling in front of your
Exterior lighting97
Lights and windshield wiper s
Z

vehicle, and consequently switches the head-
lampsfrom high beamtol ow beam.
The system automatically adapts the low-beam
headlamp range depending on the distance to
the other vehicle. Once the system no longer
detects any other vehicles, it reactivates the
high-beam headlamps.
The system' soptical sensor is located behind
the windshieldn ear the overheadc ontrol panel.
Important safety notes
GWARNING
Adaptive Highbeam Assist does not recognize
road users:
Rwho have no lights, e.g. pedestrians
Rwho have poor lighting, e.g. cyclists
Rwhosel ighting is blocked,e .g. byabarrier
On very rare occasions, Adaptive Highbeam
Assist may fail to recognize other road users
that have lights, or may recognize them too
late. In this, or in similar situations, the auto-
matic high-beam headlamp swilln ot be deac-
tivated or wil lbeactivated regardless. There is
ar isk of an accident.
Always carefully observe the traffic conditions
and switch off the high-beam headlamp sin
good time.
Adaptive Highbeam Assist cannot take into
account road ,weather or traffic conditions.
Adaptive Highbeam Assist is only an aid .You are
responsible for adjusting the vehicle's lighting
to the prevailing light, visibility and traffic con-
ditions.
In particular, the detection of obstacles can be
restricted if there is:
Rpoor visibility, e.g. due to fog, heavy rain or
snow
Rdirt on the sensors or the sensors are
obscured
Switching Adaptive Highbeam Assist
on/off
XTo switch on: turn the light switch to Ã.
XPress the combination switch beyond the
pressure point in the directionofa rrow:.
The _ indicator lamp in the multifunction
display lights up when it is dark and the light
sensor activates the low-beam headlamps.
If you are driving at speeds above approx-
imatel y16m ph (25 km/h):
The headlamp range is set automatically
depending on the distance between the vehi-
cle and other road users.
If you are driving at speeds above approx-
imatel y19m ph (30 km/h )and no other road
users have been detected:
The high-beam headlamp sare switched on
automatically. The Kindicator lamp in the
instrument cluster als olights up.
If you are driving at speeds belowa pprox-
imatel y16m ph (25 km/h) or other road users
have been detected or the road sare ade-
quately lit:
The high-beam headlamp sare switched off
automatically. The Kindicator lamp in the
instrument cluster goes out. The _indi-
cator lamp in the multifunction display
remains lit.
XTo switch off: move the combination switch
back to its normal position or move the light
switch to another position.
The _ indicator lamp in the multifunction
display goes out.
98Exteriorl ighting
Lights and windshield wipers

Interior lighting
Overview of interior lighting
Overhead control panel
:
pSwitches th eleft-han dreading lamp
on/off
;| Switches th eautomatic interio rlight-
ing control on/off
=p Switches th eright-hand reading lamp
on/off
?c Switches th einterio rlighting on/off
Interior lighting control
General notes
In order to preven tthe vehicle's battery from
discharging ,the interio rlighting function sare
automatically deactivated after som etime,
unless th eSmartKey is in position 2in th e
ignition lock.
The color and brightness of th eambien tlighting
are set via th emultimedia system
(
Ypage 172).
Automati cinterior lighting control
XTo switch on/off: press the| button.
When th eautomatic interio rlighting control is
activated, th ebutto nisf lushw itht he over-
head control panel.
The interio rlighting automatically switches on if
you:
Runlock th evehicl e
Ropen adoor
Rremove th eSmartKey from th eignition loc k
The interio rlighting is switched on for aset time
when th eSma rtKey is remove dfromt heignition lock. You can activat
ethisd elaye dswitch-off
usin gthe on-board computer (
Ypage 173).
Replacingbulbs
Important safety notes
GWARNIN G
Bulbs, lamp sand connectors can get ver yhot
when operating .Ifyou chang eabulb, you
could burn yourself on these components.
Ther eisar iskofi njury.
Allow these component stocooldown before
changing abulb.
Vehicles with halogen lamps
Do no tuse alamp that has been dropped or if it s
glass tub ehas been scratched.
The lamp may explod eif:
Ryou touch it
Rit is hot
Ryou dro pit
Ryou scratch it
Only operate bulbs in enclosed lamp sdesigned
for that purpose .Onlyi nstal lspar ebulbs of th e
sam etypea nd th especifie dvoltage.
Mark sont heglass tub ereduce th eservic elife
of th ebulbs .Don ottouch th eglass tub ewith
your bare hands. If necessary, clean th eglass
tub ew hen cold wit halcohol or spirit and rub it
off wit halint-free cloth .
Protect bulbs from moisture during operation .
Do no tallow bulbs to come int ocontac twith
liquids.
Only replace th elamp slisted (
Ypage 100).
Hav ethe bulbs that you canno treplace yourself
replace dataq ualified specialist workshop.
If you require assistanc ereplacing lamps, con-
sult aqualified specialist workshop.
If th enew lamp still does no tligh tup, consult a
qualified specialist workshop.
Bulb sand lamp sare an important aspect of
vehicl esafety. You must therefor emakes ure
that these function corre
ctl
yatall times .Have
th eh eadlamp setting checke dregularly.
Vehicles with LED headlamp s
The fron tand rear ligh tclusters of your vehicl e
are equipped wit hLED ligh tbulbs .Don ot
replace th ebulbs yourself .Contac taqualified
Replacingb ulbs99
Lightsand windshield wipers
Z

Setting the air distribution
Air-conditioning system
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XPress one or more of the P,O,¯
buttons.
The correspondingi ndicator lamp lights up
briefly.
The following air distribution settings can be
selected:
¯ Directsa ir through the defroster vents
O Directsa ir through the footwell air vents
P Directsa ir through the center and side air
vents
iYou can also activate several air distribution
settings simultaneously. To do this, press
multiple air distribution buttons. The air is
then directed through various vents.
3-zone automatic climate control
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XPress the _button repeatedly until the
desired symbol appears in the display.
The following air distribution settings can be
selected:
P Directsa ir through the center and side air
vents
O Directsa ir through the footwell air vents
S Directsa ir through the center, side and
footwell vents
¯ Directsa ir through the defroster vents
b Directst he airflow through the defroster,
center and side air vents( Canada only)
a Directsa ir through the defroster and
footwell vents
_ Directst he airflow through the defroster
vents, the center and side air ventsa s
well as the footwell air vents( Canada
only)
iRegardless of the air distribution setting,
airflow is always directed through the side air
vents. You can only close the side air vents, by fully closing the adjuster on the side air vents
(
Ypage 113).
Setting the airflow
Air-conditioning system
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XTo increase or reduce: turn controlC
clockwise or counter-clockwise (Ypage 104).
3-zone automatic climate control
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XTo increase or reduce: press theKor
I button.
Switching the ZONE function on/off
This function is only available with 3-zone auto-
matic climate control on vehicles for Canada.
XTo switch on: press theábutton.
The indicator lamp in the ábutton lights
up. The temperature settingf or the driver's
side is not adopted for the front-passenger
side.
XTo switch off: press theábutton.
The indicator lamp in the ábutton goes
out. The temperature settingf or the driver's
side is adopted for the front-passenger side.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to defrost the inside of the windshield
and the side windows.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again.
Switching the "windshield defrosting"
function on or off
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XTo switch on: press the¬button.
The indicator lamp in the ¬button lights
up.
110Operating the climate control systems
Climatec ontrol

Where possible, avoid spinningthe drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
Key positions
SmartKey
gTo remove the SmartKey
1Power supply for some consumers, such as
the windshield wipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
iThe 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 adetachable 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 differentk 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
,the engine start simmedi-
ately.
Ac heck which periodically establishes aradio
connection between the vehicle and the Smart-
Key determines whether avalid SmartKey is in
the vehicle. This occurs,f or example, when
starting the engine.
To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in the
ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO (Ypage 65).
Do not keep the SmartKey:
Rwith electronic devices, e.g. amobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. ametal case.
This can impair the functionality of the KEY-
LESS-GO key.
If you lock the vehicle with the SmartKey's
remotec ontrol or with KEYLESS-GO, after a
short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou 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
:Start/Stop button
;Ignition lock
116Driving
Driving and parking

As soonasthe ignition is switched on, al lthe
indicator lamps in the instrument cluster light
up .Further informatio nonsituations where an
indicator lamp either fails to go outa fterstarting
the engine or lights up whil edriving
(
Ypage 204).
If Start/Stop button :hasn ot yetbeen
pressed, thisc orrespondstot he key being
removedf rom the ignition.
XTo switchonthe power supply: press
Start/Stop button :once.
The powe rsuppl yiss witched on. Yo ucan now
activate the windshield wipers, for example.
The powe rsuppl yiss witched off agai nif:
Rthe driver's door is opene dand
Ryoup ress Start/Stop button :twice when
in thisp osition
XTo switc honthe ignition: press Start/Stop
button :twice.
The ignition is switched on.
If yo upress Start/Stop button :once when
in thisp osition, the ignition is switched off
again.
Removing the Start/Stopb utton
Youc an remove the Start/Stop button from the
ignition lock and start the vehicl easnormal
using the SmartKey.
XRemove Start/Stop button :from ignition
lock ;.
Yo udon ot have to remove the Start/Stop but-
ton from the ignition lock when yo uleave the
vehicle. Yo ushould, however, always take the
SmartKeyw ithy ou when leaving the vehicle. As
long as the Sma rtKey
isint
he vehicle:
Rthe vehiclecan be started using the Start/
Stop button
Rthe electrically powered equipment can be
operated
Starting the engine
Important safety notes
GWARNING
If children ar eleftu nsupervised in the vehicle,
they could:
Roperate the vehicle's equipment.
Additionally, children could set the vehicl ein
motion if, for example, they:
Rrelease the parking brake
Rshift the automatic transmission outofp ark
position P
Rstart the engine
There is ariskofana ccident and injury.
Never leav echildren or animals unattended in
the vehicle.
Whe nleavi ng the vehicle, always take the
SmartKeyw ithy ou and lock the vehicle. This
also applie stomobilephones if the "Digital
Ca rK ey in smartphone"f unctio nisa ctivated
via the Mercedes me connect we bapp.
GWARNING
Combustion engine semitp oiso nousexhaust
gases such as carbo nmonoxide. Inhaling
thes eexhaus tgases lead stopoisoning. There
is ar iskoff atalinjury.T herefore neve rleave
the engine running in enclose dspaces with-
outs ufficient ventilation.
GWARNING
Flammabl ematerial sintroduced through
environmentali nfluence or by animals can
ignite if in contact with the exhaus tsystem or
parts of the engine thath eatu p.There is arisk
of fire.
Carry outr egular checks to make sure that
ther eareno flammabl eforeig nmaterial sin
the engine compartment or in the exhaust
system.
During acolds tart, the engine runs at higher
speed stoenablethe catalytic converter to
reach its operating temperature .The sound of
the engine mayc hange during thist ime.
Automatictransmission
XDepres sthe brake peda land kee pit
depressed.
XShift the transmission to position j.
Transmission positio ndisplay jis shown in
the multifunctio ndisplay.
Driving117
Driving an dparking
Z

iYou can startthe engin eintransmission
position jand i.
Starting procedur ewith th eSmartKey
To star tthe engin eusing the SmartKey instead
of KEYLESS-GO, pull the Start/Stop button out
of the ignition lock.
XTurn the SmartKey to position 3in the igni-
tion lock (Ypage 116)a nd release it as soon
as the engin eisrunning.
Using KEYLESS-GO to start th eengine
The Start/Stop button can be used to star tthe
vehicle manually without insertin gthe SmartKey
int ot he ignition lock .The Start/Stop button
must be inserted in the ignition lock and the
SmartKey must be in the vehicle. This mode for
startin gthe engin eoperates independently of
the ECO start/sto pautomatic engin estar tfunc-
tion.
XDepress the brakep edal and keep it
depressed.
XPress the Start/Stop button once
(Ypage 116).
The engin estarts.
Pulling away
Genera lnotes
GWARNING
If the engin espeed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is
ar isk of an accident.
When engagin gtransmission position Dor R,
always firmly depresst he brakepedal and do
not simultaneously accelerate.
!Change gear in good tim eand avoid spin-
nin gthe wheels. You could otherwise damage
the vehicle.
Depress the accelerator carefully when pulling
away.
The vehicle lock scentrally onc eyou have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time. You can also deactivate the automatic locking
feature (
Ypage 173).
It is only possible to shift the transmission from
position jto the desired position if you
depresst he brakep edal. Only the nisthe shift
lock released.
iUpshifts tak eplace at higher engin espeeds
afte rac old start. This helps the catalytic con-
verter to reach its operating temperature
more quickly.
Information on the automatic release of the
electric parking brake(
Ypage 133).
Hill start assist
Hill star tassist helps you when pulling away
forwardorinr everse on an uphill gradient. It
holds the vehicle for ashortt imea fteryou have
removed your foot from the brakep edal. This
gives you enough tim etomove your foot from
the brakep edal to the accelerator pedal and to
depressitb eforethe vehicle begins to roll.
GWARNING
After ashortt ime, hill star tassist will no lon-
ger brakey our vehicle and it could roll away.
There is arisk of an accident and injury.
Therefore, quickly move your foot from the
brakep edal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
Hill star tassist is not active if:
Ryou are pulling away on alevel road or on a
downhill gradient
Rthe transmission is in position i
Rthe electric parking brakeisapplied
RESP®is malfunctioning
ECO start/stop function
Introduction
The ECO start/sto pfunction switches the
engin eoff automatically if the vehicle is stopped
under certain conditions.
The engin estarts automatically when the driver
want stop ull away again. The ECO start/stop
function thereby helps you to reduce the fuel
consumption and emissions of your vehicle.
118Driving
Driving and parking