2018 MERCEDES-BENZ SLC ROADSTER battery

The climate control system switches to the
following functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and front
side windows
Rair-recirculation mode off
XTo switch off:press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
XDual-zon eautomatic climate control: press
the à button.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
MAX COOL maximum cooling
The MAX COOL function is only availableinv ehi-
cles for the USA.
MAX COOL is only operational when the engine
is running.
XTo activate: press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp in the button goes out. The
previously selected settings are restored.
When you activate MAX COOL, climate control
switches to the following functions:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode on
Defrosting the windows
Windows fogged up on the inside
XActivate the ¿orÁ cooling with air
dehumidification function.
XDual-zon eautomatic air conditioning: acti-
vate the Ãmode button.
XIf the windows continue to fog up, activate the
¬ "Windshield defrosting" function.
iYou should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XAir-conditioning system: press the Por
O button.
XDual-zon eautomatic air conditioning: press
the _ button until the PorO sym-
bol appears in the display.
iYou should only select this setting until the
windshield is clear again.
Rear window defroster
General notes
The rear window defroster has ahigh current
draw. You should therefor eswitch it off as soon
as the rear window is clear. Otherwise, the rear window defroster switches off automatically
after several minutes.
If the battery voltage is too low, the rear window
defroster may switch off.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XPress the ¤button.
The indicator lamp in the ¤button lights
up or goes out.
Operating the climate control systems111
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences andMSolutions
The indicator lamp on
the¤ button flashes.
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off any consumers that are not required, e.g. reading lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window defroster
can be activated again.
The roof is open.
XClose the roof.
When the roof is closed, the rear window defroster can be activated
again.
Switching air-recirculation mode
on/off
General notes
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 116).
XTo activate: press thegbutton.
The indicator lamp in the gbutton lights
up.
iAir-recirculation mode is automatically acti-
vated at high levels of pollution (dual-zone
automatic climate control only) or at high out-
side temperatures. When air-recirculation
mode is activated automatically, the indicator
lamp in the gbutton is not lit. Outside air
is added after about 30 minutes.
XTo deactivate: press thegbutton.
The indicator lamp in the gbutton goes
out.
iAir-recirculation mode deactivates auto-
matically:
Rafter approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
Rafter approximately five minutes if cooling
with air dehumidification is deactivated
Rafter approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutes after the engine has
been switched off. The heating time depends on
the set interior temperature.
Activating/deactivating
XTurn the SmartKey to position uin the igni-
tion lock or remove it (Ypage 116).
XTo activate: press theÌorÁ button.
The indicator lamp in the ÌorÁ button
lights up.
iThe blower will run at alow speed regardless
of the airflow setting.
112Operating the climate control systems
Climatec ontrol

iIf you activate the residual heat function at
high temperatures, only the ventilation willb e
activated. The blower runs at mediums peed.
XTo deactivate:press theÌorÁ but-
ton.
The indicator lamp in the ÌorÁ button
goes out.
Residualh eat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Setting the air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could resultinb urns or frostbite in
the immediate vicinity of the air vents. There
is ar isk of injury.
Make sure that all vehicle occupants always
maintain asufficient distance to the air out-
lets. If necessary,r edirect the airflow to
another area of the vehicle interior.
GWARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could resultinb urns in the immediate
vicinity of the air vents. There is arisk of injury.
Reduce the heater outputb efore it becomes
too hot.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet grilleont he hood and in the
engine compartment on the front-passenger
side free of blockages, such as ice, snow or
leaves.
Rnever cover the air vents or air intake grilles in
the vehicle interior.
iYou can move the adjusters for the air vents
verticallyorh orizontally to set the direction of
the airflow.
iFor optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the center air vents
XTo open the center air vents: turn the
adjuster in one of center air vents :counter-
clockwise.
XTo close the center air vents: turn the
adjuster in one of center air vents :clock-
wise until it engages.
Setting the side air vents
:Side window defroster vent
;Side air vent
XTo open aside air vent: turn the adjuster in
the side air vent ;to the left.
XTo close aside air vent: turn the adjuster in
the side air vent ;to the right until it
engages.
Setting the air vents113
Climate control
Z

Deactivating or activating theECO
start/stop functionXTo deactivate :press EC Obutto n:.
Indicator lamp ;goe sout.
XTo activate :press EC Obutto n:.
Indicator lamp ;lights up.
If indicator lamp ;is off, th eECO start/sto p
function has bee ndeactivated manually or as
th er esult of amalfunction .The engin ewill then
no tbes witched of fautomatically when th evehi-
cl es tops .
Problem switht he engin e
ProblemPossible causes/consequences an dMSolutions
The engin edoesn ot
start .The HOLD function or Distanc ePilotD ISTR ONIC is activated.
XDeactivat ethe HOLD function (Ypage 148) or Distanc ePilot
DISTRONIC (Ypage 146).
XTryt os tart th eenginea gain .
The engin edoesn ot
start .The starter moto r
can be heard.RThere is amalfunction in th eenginee lectronics.
RThere is amalfunction in th efuelsupply.
Before attemptin gtostart th eenginea gain :
XTurnthe SmartKey bac ktoposition uin th eignition lock.
or
XPress th eStart/Sto pbutto nrepeatedly until all indicator lamp sin
th ei nstrument cluster go out .
XTryt os tart th eenginea gain (Ypage 117). Avoid excessivel ylon g
and frequent attempt stostart th eengineast hese will drain th e
battery.
If th eengined oesn otstart after severa lattempts:
XConsult aqualified specialis tworkshop .
The engin edoesn ot
start .You canno thear
th es tarter motor.The on-boar dvoltag eistoolow because th ebattery is to oweak or
discharged.
XJump-start th evehicle (Ypage 253).
If th eengined oesn otstart despit eattempts to jump-start it :
XConsultaqualified specialis tworkshop .
The starter moto rwas exposed to athermal load that was to ohigh.
XAllow th estarter moto rtocooldown fo rapproximately tw ominutes.
XTryt os tart th eenginea gain .
If th eengines till doe snotstart :
XConsult aqualified specialis tworkshop .
120Driving
Driving an dpark ing

Problems with fuel and the fuel tank
ProblemPossible causes/consequences andMSolutions
Fuel is leaking from the
vehicle.The fuel line or the fuel tank is faulty.
GWARNING
Risk of explosion or fire.
XTurn the SmartKey immediately to position uin the ignition lock
(Ypage 116) and remove it.
XDo not restart the engine under any circumstances.
XConsult aqualified specialist workshop.
The fuel filler flap cannot
be opened.The fuel filler flap is not unlocked.
XUnlock the vehicle (Ypage 65).
The SmartKey battery is discharged or nearly discharged.
XUnlock the vehicle using the mechanical key (Ypage 67).
The fuel filler flap is unlocked, but the opening mechanism is jammed.
XConsult aqualified specialist workshop.
Parking
Important safety notes
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is arisk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstart the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is arisk 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.
!Always secure the vehicle correctly against
rolling away.O therwise, the vehicle or its driv-
etrain could be damaged.
To ensure that the vehicle is secured against
rolling away unintentionally:
Rthe electric parking brake must be applied.
Rthe transmission must be in position j.
Rthe SmartKey must be removed from the igni-
tion lock.
Rthe front wheels must be turned towards the
curb on steep uphill or downhill gradients.
Switching off the engine
GWARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away.T here isarisk of an
accident.
After switching off the engine, always switch
to parking position P.Prevent the parked vehi-
Parking131
Driving and parking
Z

Applyingautom atically
The electric parking brak eisautomatically
applie dwhen th etransmission is in position j
and :
Rthee ngineiss witched off or
Rthed river is no twearing aseat belt and th e
driver's door is opened
To preven tthe electric parking brak efromb eing
automatically applied, pull handle :.
The electric parking brak eisalso engage dauto -
matically if:
RDistanc ePilotD ISTR ONICbring sthe vehicl e
to as tandstill or
Rth eH OLDf unction is keepin gthe vehicl esta-
tionary
In addition ,atleast on eofthefollowin gcondi -
tion smustbef ulfilled :
Rthee ngineiss witched off
Rthed river is no twearing aseat belt and th e
driver's door is opened
Rthere is asystem malfunction
Rthep owe rsupply is insufficien t
Rthev ehicl eiss tationary for alengthy period
The red F(USAonly) or ! (Canada only)
indicator lamp in th einstrumen tcluste rlights
up.
The electric parking brak eisnotautomatically
engage diftheengin eisswitched off by th eECO
start/sto pfunction .
Releasing automatically
The electric parking brak eisrelease dautomat -
ically when all of th efollowin gconditi onsa re
fulfilled :
Rthee ngineisr unnin g
Rthes eat belt tongue is engage dinthebelt
buckl e
Rthet ransmission is in position hork and
you depress th eaccelerato rpedal or shif t
from position jtoh ork
Rif th etransmission is in position k,thetrunk
lid mus tbeclosed If th
eseat belt tongue is no tengage dint heseat
belt buckle, th efollowin gconditi onsm ustb e
fulfilled :
Rthed river's door is closed
Ryou mov ethe transmission out of position j
or you hav epreviously driven at aspee d
abov e2m ph (3 km/h)
Rif thetransmission is in position k,thetrunk
lid mus tbeclosed
When th eelectric parking brak eisreleased,
th e! indicator lamp goes out in th einstru-
men tcluster.
Eme rgency braking
The vehicl ecan also be braked during an emer-
gency by usin gthe electric parking brake.
XWhil edriving, push handle :of th eelectric
parking brake.
The vehicl eisbraked for as lon gasthehandle
of th eelectric parking brak eispressed. The
longer th eelectric parking brak ehandle is
depressed, th egreate rthe braking force .
During braking :
Rawarning tone sounds
RtheReleas eParkin gBrakemessage
appear s
Rther ed F (USAonly) or ! (Canada
only) indicator lamp in th einstrumen tcluste r
flashes
When th evehicl ehas been braked to astand -
still, th eelectric parking brak eisengaged.
Park ing th evehicle for along period
If you leav ethe vehicl eparked for longer than
four weeks, th ebattery may be damaged by
exhaustive discharging.
If you leav ethe vehicl eparked for longer than six
weeks, th evehicl emay suffer damag easa
result of lack of use.
XVisit aqualified specialist workshop and see k
advice .
iYou can obtain information about trickle
chargers from aqualified specialist work-
shop.
Parking133
Driving and parking
Z

Changing lanes
If when driving on multilane roads you wish to
change to theovertakin glane ,Distance Pilot
DISTRONIC support syou if:
Ryou are driving faster than 45 mph (70 km/h)
RDistance Pilo tDISTRONICi smaintaining the
distance to avehicl einf ront
Ryous witch on the appropriate tur nsignal
RDistance Pilo tDISTRONICd oesn ot currently
detect adangerofc ollision
If these conditions ar efulfilled ,you rv ehicl eis
accelerated .Acceleratio nwillbei nterrupte dif
changing lanes take stoo long or if the distance
between your vehicl eand the vehicl einfront
become stoo small.
iWhen yo uchange lanes ,Distance Pilot
DISTRONICm onitors the left lane (o nleft-
hand-driv evehicles) or the right lane (o nright-
hand-driv evehicles).
Stopping
GWARNING
If yo uleave the vehicl ewhenitiso nlyb eing
braked by Distance Pilo tDISTRONIC, it could
rol lawa yif:
Rthere is amalfunctio ninthe system or in
the voltag esupply.
RDistance Pilo tDISTRONICi sswitched off
using the cruis econtro llev er,e .g.b yav ehi-
cle occupant or fromo utside the vehicle
Rthe electrical system in the engine com-
partment, the battery or the fuses ar etam-
pered with.
Rthe battery is disconnected
Rthe vehicl eisaccelerated ,e.g.b yav ehicle
occupant.
There is ariskofana ccident.
Before leaving the vehicle, always deactivate
Distance Pilo tDISTRONICa nd securethe
vehicl eagain st rolling away.
Furtheri nformatio nondeactivating Distance
Pilo tDISTRONIC(
Ypage 146).
If Distance Pilo tDISTRONICd etects thatt he
vehicl einfront is stopping, it brakes your vehicle
unti litiss tationary. Once your vehicl
eisstationary, it remains sta-
tionar yand yo udon ot nee dtodepress the
brake.
iAfter atime ,the electri cparkin gb rake
secures the vehicl eand relieves the service
brake.
iDepending on the specifie dminimu mdis-
tance ,you rvehicl ewillc ome to astandstil lat
as ufficient distance behind the vehicl ein
front. The specifie dm
i
nimu mdistance is set
using the contro lonthe cruis econtro llev er.
When Distance Pilo tDISTRONICisa ctivated,
the transmission is shifted automaticall yto
position jif:
Rthe driver's sea tbeltisn ot fastened and the
driver's door is open.
Rthe engine is switched off ,unless it is auto-
maticall yswitched off by the ECO start/stop
function.
The electri cparkin gb rake secures the vehicle
automaticall yifDistance Pilo tDISTRONICi s
activated when the vehicl eisstationar yand:
Ras ystem malfunctio noccurs.
Rthe powe rsuppl yisn ot sufficient.
If am alfunctio noccurs, the transmission may
also shift to position jautomatically.
Settin gaspeed
Keepinm indt hatitm aytake abrief moment
unti lthe vehicl ehasaccelerated or braked to
the spee dset.
XTo adjustt he setspeed in 1mph incre-
ments (1 km/hi ncrements):briefly press
the cruise control lever up :to the pressure
point for ahigher speed, or down ;for a
lower speed.
Every time the cruise control lever is pressed
up or down, the last speed stored is increased
or reduced.
XTo adjust th eset speed in 5mph incre-
ment s(10 km/h increments): briefly
press the cruise control lever up :past the
pressurep oint forahigher speed, or down ;
for alower speed.
Every time the cruise control lever is pressed
up or down, the last speed stored is increased
or reduced.
144Driving systems
Driving and parking

HOLD function
General notes
The HOLD function can assist the driverint he
following situations:
Rwhen pulling away, especially on steep slopes
Rwhen maneuvering on steep slopes
Rwhen waiting in traffic
The vehicleisk ept stationary without the driver
having to depress the brake pedal.
The braking effect is cancele dand the HOLD
function deactivated when you depress the
accelerator pedaltop ulla way.
Important safety notes
GWARNING
When leaving the vehicle, it can still roll away despite being braked by the HOLD function if:
Rthere is amalfunction in the system or in
the voltag esupply.
Rthe HOLD function has been deactivated by
pressing the accelerator pedalort he brake
pedal, e.g. by avehicleo ccupant.
Rthe electrical system in the engine com-
partment, the battery or the fuse shave
been tampere dwith.
Rthe battery is disconnected
There is arisk of an accident.
If you wis htoexit the vehicle, alway sturn off
the HOLD function and secure the vehicle
against rolling away.
!When Distance Pilot DISTRONIC or the
HOLD function is activated, the vehicle
brakes automatically in certain situations.
To avoi ddamage to the vehicle, deactivate
Distance Pilot DISTRONIC and the HOLD
function in the following or similar situations:
Rwhen towing the vehicle
Rin the car wash
Deactivating the HOLD function (
Ypage1 48).
Activation conditions
You can activate the HOLD function if all of the
following conditions are fulfilled:
Rthe vehicleiss tationary.
Rthe engine is running or if it has been auto-
matically switched off by the ECO start/stop
function.
Rthe driver's door is closed or you rseat belti s
fastened.
Rthe electric parking brake is released.
Rthe transmission is in position h,kori.
RDistance Pilot DISTRONIC is deactivated
Activating the HOLD function
XMake sure that the activation conditions are
met.
XDepress the brake pedal.
XQuickly depress the brake pedalf urther
until :appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
iIf depressing the brake pedalt he first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivatin gthe HOLD function
The HOLD function is deactivated automatically
if:
Ryou depress the accelerator and the trans-
mission is in position hork.
Ryou shift the transmission to position j.
Ryou apply the brakes again withacertain
amount of pressure until HOLDdisappears
from the multifunction display.
Ryou secure the vehicleu sing the electric park-
ing brake.
Ryou activate Distance Pilot DISTRONIC.
iAfter atime, the electric parking brake
secure sthe vehiclea nd relieves the service
brake.
148Driving systems
Driving and parking