2018 MERCEDES-BENZ SLC ROADSTER Owner's Manual

XMake sure that the ignition is switched off. All indicator lamps in the instrumentcluster must be
off. When using the SmartKey, turn the SmartKey to position uin the ignition lock and remove it
(
Ypage 116).
XSwitch off all electrical consumers, e.g. rear window defroster, lighting, etc.
XOpen the hood.
Position number Bidentifies the charged battery of the other vehicle or an equivalent jump-starting
device.
XSlide cover :of positive terminal ;in the direction of the arrow.
XConnect positive terminal ;on your vehicle to positive terminal =of donor battery Busing the
jumper cable, always begin with positive terminal ;on your own vehicle first.
XStart the engine of the donor vehicle and run it at idling speed.
XConnect negative terminal ?of donor battery Bto ground point Aof your vehicle using the
jumper cable, connecting the jumper cable to battery of other vehicle Bfirst.
XStart the engine.
XBefore disconnecting the jumper cables, let the engine run for several minutes.
XFirst, remove the jumper cables from ground point Aand negative terminal ?,then from pos-
itive terminal ;and positive terminal =.Begin each time at the contacts on your own vehicle
first.
XClose cover :of positive terminal ;after removing the jumper cables.
XHave the battery checked at aqualified specialist workshop.
Jump-starting is not considered to be anormal operating condition.
iJumper cables and further information regarding jump-starting can be obtained at any qualified
specialist workshop.
Jump-starting255
Breakdown assistance
Z

Towingand tow-starting
Important safety notes
GWARNING
When towing or tow-startin ganotherv ehicle
and its weight is greate rthant he permissible
gross weight of your vehicle, the:
Rthe towing ey ecould detach itself
Rthe vehicle/trailer combinatio ncould roll-
over.
There is ariskofana ccident.
When towing or tow-startin ganotherv ehicle,
its weight shoul dnot be greate rthant he per-
missibl egross weight of your vehicle.
Detail sonthe permissibl egross vehicl eweigh t
of your vehicl ecan be found on the vehicl eide n-
tification plate (
Ypage 289).
!When Activ eBrake Assist, Distance Pilot
DISTRONICort he HOLD functio nisa ctivated,
the vehicl ebrakes automaticall yincertain
situations.
To avoi ddamag etothe vehicle, deactivate
these system sinthe following or similar sit-
uations:
Rwhen towing the vehicle
Rin the car wash
!Onlys ecurethe tow rop eortow ba ratthe
towing eyes. Otherwise, the vehicl ecould be
damaged.
!Do not us ethe towing ey efor recovery, this
could damage the vehicle. If in doubt, recover
the vehicl ewithac rane.
!When towing ,pulla wa yslowly and
smoothly. If the tractiv epower is too high, the
vehicles could be damaged.
!Do not tow with sling-typ eequipment .This
could damage the vehicle.
!When towing away vehicles with KEYLESS-
GO ,use the key instea dofthe Start/Stop
button. The automatic transmission mayo th-
erwis eshift to position jwhen yo uopent he
driver's or front-passenge rdoor, which could
damage the transmission.
!Make sure thatt he electricparkin gb rake is
released .Ifthe electri cparkin gbrake is faulty,
visit aquali fied specialis tworkshop.
!The vehicl ecan be towed amaximum of
30 miles (50km). The towing spee dof30mph
(50 km/h )mustn ot be exceeded.
If the vehicl ehasto be towed mor ethan
30 miles (50km), the entire vehicl emustb e
raised and transported.
!If yo utow or tow-start anotherv ehicle, its
weight must not exceed the maximum per-
missibl egross vehicl eweigh tofy ourvehicle.
It is better to have the vehicl etransporte dthan
to have it towed away.
The automatic transmission must be in position
i when the vehicl eisbeing towed away.
The battery must be connected and charged.
Otherwise, you:
Rcanno tturnt he SmartKeytop osition 2in
the ignition lock.
Rcanno tshift the automatic transmission to
position i.
Deactivate the automatic locking featur ebef
o
re
the vehicl eistowed (Ypage 173).Y oucould
otherwis ebelocked ou twhenp ushing or towing
the vehicle.
Installing/removin gthe towin geye
Installing the towin geye
GWARNING
The exhaust tai lpipem aybe ver yhot. There is
ar iskofb urns when removing the rea rcover.
Do not touch the exhaust pipe .Tak ep articular
car ew henr emoving the rea rcover.
256Towin gand tow-starting
Breakdow nassistance

The bracketsfor the screw-in towing eye are
located in the bumpers. They are at the front and
at the rear, behind the covers.
XRemove the towing eye from the vehicle tool
kit (Ypage 245).
XPress the mark on cover :inwards in the
direction of the arrow.
XTake cover :off the opening.
XScrew in the towing eye clockwise as far as it
will go and tighten it.
Removing the towing eye
XUnscrew and remove the towing eye.
XAttach cover :to the bumper and press until
it engages.
XPlace the towing eye in the vehicle tool kit.
Towing avehicle with both axles on
the ground
GWARNING
You can no longer steer the vehicle if the
steerin gwheel lock has been engaged. There
is ar isk of an accident.
Always switch off the ignition when towing the
vehicle with atow cable or atow bar.
The automatic transmission shifts to position
j automatically when you open the driver's or
front-passenger door or when you remove the
SmartKey from the ignition lock. In order to ensure that the automatic transmis-
sion stays in position
iwhen towing away the
vehicle, you must observe the following points:
XSwitch on the hazard warning lamps
(Ypage 97).
XTurn the SmartKey to position 2in the igni-
tion lock.
On vehicles with KEYLESS-GO, use the Smart-
Key instead of the Start/Stop button
(
Ypage 116).
XDepress and hold the brake pedal.
XShift the transmission to position i.
XRelease the brake pedal.
XRelease the electric parking brake.
XLeave the SmartKey in position2in the igni-
tion lock.
In order to signal achange of direction when
towing the vehicle with the hazard warning
lamps switched on, use the combination switch
as usual. In this case, only the indicator lamps
for the direction of travel flash. When you reset
the combination switch, the hazard warning
flashers start flashing again.
It is important that you observe the safety
instructions when towing away your vehicle
(
Ypage 256).
Towing the vehicle with the rear axle
raised
!
The ignition must be switched off if you are
towing the vehicle with the rear axle raised.
Intervention by ESP
®could otherwise dam-
age the brake system.
!Vehicles with automatic transmission must
not be towed with the rear axle raised. The
vehicle/trailer combination may otherwise
swerve or even roll over.
Towing and tow-starting257
Breakdown assistance
Z

Transporting the vehicle
Vehicle switha utomatic transmission
!When the vehicl eisloaded for transport, the
front and rea raxles must be stationar yand on
the same transportatio nvehicle. Positioning
ove rthe connectio npoint of the transport
vehicl eisnot permitted .The drive train may
otherwis ebedamaged .
Allv eh icles
!Youm ayonl ysecur ethe vehicl ebythe
wheels ,not by parts of the vehicl esucha s
axl eors teerin gcomponents. Otherwise, the
vehicl ecould be damaged.
The towing ey ecan be used to pull the vehicle
onto atrailer or transporte rfor transporting pur-
poses.
XTurn the SmartKeytop osition 2in the igni-
tio nlock.
XShift the transmission to position i.
As soon as the vehicle has been loaded:
XPrevent the vehicl efromr olling away by
applying the electri cparkin gb rake.
XShift the transmission to position j.
XTurn the SmartKeytoposition uin the igni-
tio nlocka nd remove the SmartKeyf romthe
ignition lock.
XSecure the vehicle.
Tow-starting (emergency engine
starting)
!
Vehicles with automatic transmission must
not be tow-started .You could otherwis edam -
ag et he automatic transmission. Yo
uc an find informatio non"Jump-starting "at
(
Ypage 253).
Fuses
Important safety notes
GWARNING
If yo umanipulate or bridg eafaulty fuse or if
yo ur eplace it with afusew ithah ighe ramper -
age, the electri ccable scould be overloaded.
Thi scould resul tinafire. There is ariskofa n
accident and injury.
Alway sreplace faulty fuses with the specified
new fuses havin gthe correct amperage.
Blown fuses must be replaced with fuses of the
same rating ,which yo ucan recognize by the
color and value. The fuse rating sarelisted in the
fuse allocation chart.
The fuse allocation chart is locate dinthe vehicle
tool kit in the stowag ecompartment under the
trunk floor (
Ypage 245).
If an ewly inserte dfusea lsob lows ,havet he
cause traced and rectifie dataqualified special-
is tw orkshop ,e.g.ana uthorize dMercedes-Benz
Center.
!Onlyu sefuses thath aveb eena pproved for
Mercedes-Benz vehicles and which have the
correct fuse rating for the system concerned.
Otherwise, components or system scould be
damaged.
!Make sure thatnom oisture can enterthe
fuse bo xwhent he cove risopen.
!When closing the cover, make sure thatiti s
lying correctl yonthe fuse box. Moisture seep-
ing in or dirt could otherwis eimpai rthe oper-
atio
n of the fuses.
The fuses in your vehicl eserve to close down
faulty circuits. If afuseb lows ,allthe compo-
nents on the circui tand their functions stop
operating.
Before changin gafuse
XSwitch off the engine.
XSwitch off al lelectrical consumers.
258Fuses
Breakdow nassistance

XMake sure that the ignition is switched off
(Ypage 116).
or
XWhen using the SmartKey, turn the SmartKey to position uin the ignition lock and remove
it (
Ypage 116).
XSecure the vehicle against rolling away
(Ypage 131).
All indicator lamps in the instrumen tcluster
must be off.
The fuses are located in various fuse boxes:
RFuse box in the engine compartmentont he
left-hand side of the vehicle, when viewed in
the direction of travel
RFuse box in the trunk
Fuse box in the engine compartment
i
Observe the "Important safety notes" sec-
tion (Ypage 258).
GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is arisk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
XMake sure that the windshield wipers are
turned off.
XOpen the hood.
XUse adry cloth to remove any moisture from
the fuse box.
XTo open: open clamps ;.
XRemove fuse box cover :forwards.
XTo close: check whether the seal is lying cor-
rectly in cover :.
XInsert cover:at the rear of the fuse box into
the retainer.
XFold down cover :and close clamps ;.
XClose the hood.
Fuse box in the trunk
i
Observe the "Important safety notes" sec-
tion (Ypage 258).
The fuse box is located in the trunk behind the
partition covering.
XOpen the trunk lid.
XTo open: release cover :on the right and
left-hand sides with aflat object.
XOpen cover :downwards in the direction of
the arrow.
Fuses259
Breakdown assistance
Z

Important safety notes
GWARNING
If wheels and tires of th ewrong siz eare used,
th ew hee lbrakes or suspension component s
may be damaged. Ther eisariskofana cci-
dent.
Always replace wheels and tires wit hthose
that fulfill th especification softheoriginal
part .
When replacing wheels, mak esuretou se the
correct:
Rdesignation
Rmodel
When replacing tires ,makes uretou se the
correct:
Rdesignation
Rmanufacturer
Rmodel
GWARNIN G
Af lat tire severely impairs th edriving ,steer -
ing and braking characteristics of th evehicle.
Ther eisar iskofa ccident.
Tires without run-flat characteristics :
Rdo notdrivew ithaf lat tire.
Rimmediately replace th eflat tire wit hyour
emergenc yspar ew hee lors parew heel, or
consult aqualified specialist workshop.
Tires wit hrun-flat characteristics :
Rpay attention to theinformation and warn -
ing notice sonMOExtended tires (tire swith
run-flat characteristics).
Accessories that are no tapprove dfor your vehi-
cle by Mercedes-Ben zorare notbein gused cor-
rectl ycan impair th eoperating safety.
Before purchasing and usin gnon-ap proved
accessories, visit aqualified specialist work-
sho pand ask about :
Rsuitability
Rlegal stipulation s
Rfactory recommendation sFurther information regarding wheels and tires
can be foun
dunder "Wheel/tire combinations"
(
Ypage 284).
You can ask for information regarding permitte d
wheel-tire combination satanauthorized
Mercedes-Ben zCenter.
Information on tire pressur ecan be found:
Ron th eTirea nd Loading Information placard
on th eB-pillar on th edriver' sside
(
Ypage 271)
Rin th etirep ressur etable in th efuel filler flap
(Ypage 130)
Rin th e"Tirep ressure" section
Operation
Information on driving
Chec kthe tire pressur ewhen th evehicl eis
heavily laden and adjust prio rtoatrip.
While driving ,pay attention to vibrations, noises
and unusual handlin gcharacteristics ,e.g.p ull-
ing to on eside .This may indicat ethatthe
wheels or tires are damaged. If you suspec ttha t
at ireisd efective, reduce your spee dimmedi-
ately. Stop th evehicl eass oonasp ossible to
chec kthe wheels and tires for damage. Hidden
tire damag ecould also be causing th eunusual
handlin gcharacteristics .Ifyou fin dnos ignsof
damage, hav ethe tires and wheels checke data
qualified specialist workshop.
When parking your vehicle, mak esuret hatthe
tires do no tget deformed by th ecurboro ther
obstacles. If they canno tbeavoided, driv eover
obstacles suc hascurbs slowly and at an obtuse
angle. Otherwise, you may damag ethe wheels
or tires .
Regula rchecking of wheels and tires
GWARNIN G
Damaged tires can caus etirei nflation pres-
sur eloss .Asar esult,you could lose control of
your vehicle. Ther eisariskofa ccident.
Chec kthe tires regularly for sign sofdamage
and replace any damaged tires immediately.
260Operation
Wheels and tires

Checkwheelsand tires for damag eatleast once
am onth .Checkw heelsa nd tires after driving
off-road or on roug hroads. Damaged wheels
can caus ealoss of tir epressure. Pay particular
attentio ntodamagesucha s:
Rcutsint hetires
Rpunctures inthet ires
Rtears inthet ires
Rbulges on tires
Rdeformatio norsevere corrosiononw heels
Regularly check thetiret read dept hand the
conditio nofthetread across th ewhole widthof
th et ire(
Ypage 261). Ifnecessary, tur nthe
frontw heelstof ull lockino rder to inspectt he
inner sideof thetires urface.
All wheelsm ust haveavalvec ap to protect the
valv eagainst dirtand moisture. Do no tmount
anythingo ntot he valv eother than th estandard
valv ecap or other valv ecaps approved by
Mercedes-Ben zfor your veh icle.Don otuse any
other valv ecaps or systems ,e.g.t irep ressure
monitorin gsystems.
Regularly check thepressureofa llth et ires par-
ticularly priortol ongt rips. Adjus tthe tirep res-
sure as necessary (
Ypage 263).
Observ ethe note sont heemergenc yspare
wheel (
Ypage 285).
The servic elife of tires depends, amon gother
things, on th efollowin gfactors:
Rdriv ing style
Rtirep ressure
Rdist ancecovered
Notes on tir etread
GWAR NING
In suff icient tir etread will reduce tir etraction.
The tir eisnol ongerabletodissipat ewater.
This mean stha tonw et road surfaces ,the risk
of hydroplaning increases, inparticular where
speedisn otadapted to suit th edriving con-
dit ions. Thereisar iskofa cciden t.
If th et irep ressureist oohigh or to olow, tires
may exhibit different leve lsof wear at differ-
entl ocations on th etiret read. Thus,y ou
should regularly check th etread dept hand
th ec onditio noft hetread across th eentire
widt hofa lltires.
Minimum tir etread depthf or:
RSummer tires: âin(3 mm)
RM+S tires: ãin(4 mm)
For safety reasons, replace th etires before
th el egally prescribe dlimit for th eminimum
tir et read depthisr eached.
Marking:shows wheret hebar indicator for
tread wear (arrow) is integrate dintot he tire
tread.
Treadwear indicators (TWI)a re required by law.
Six indicators are positione donthetiret read.
They are vis ibleonce atread depthofa pprox-
imately áin (1. 6mm) has been reached. If this
is th ecase, th etireissow orn that it must be
replace d.
Selecting, mounting and replacing
tires
ROnly moun ttires and wheelsoft hesame type
and make.
Exception: itis permissible to moun tadiffer-
entt ype or mak eintheevent of aflat tire.
Observ ethe "MOExtended tires (tires with
run-flat characteristics)" section
(
Ypage 247).
ROnly moun ttires of th ecorrec tsizeo ntot he
wheels.
RBreak inne wt ires at moderat espeeds for the
first 60 mile s(10 0k m). The ne wtires only
reac htheirfull performance after this dis-
tance.
RDo no tdrivew itht ires whic hhave to olittle
tread depth. This significantly reduces the
traction on wet road s(hydroplaning).
RReplacet hetires after six years at th elatest,
regardless of wear.
Operation261
Wheels and tires
Z

MOExtended tires (tires with run-flat
characteristics)
With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive you rvehi-
cle even if there is atotal loss of pressure in one
or more tires.
MOExtended tires may only be use dinconjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor
and on wheels specifically tested by Mercedes-
Benz.
Notes on driving with MOExtended tires with a
flat tire (
Ypage2 47).
Vehicles equipped with MOExtended tires are
not equipped with aTIREFIT kit at the factory. It
is therefore recommendedt hat you additionally
equip you rvehiclew ithaTIREFIT kit if you mount
tires that do not feature run-fla tcharacteristics,
e.g. winter tires. ATIREFIT kit can be obtained
from aqualified specialist workshop.
Winter operation
General notes
Have you rvehiclew inter-proofed at aqualified
specialist workshopatt he onset of winter.
Observe the notes in the "Changing awheel"
section (
Ypage2 80).
Driving with summer tires
At temperatures below 45 ‡(+7 †), summer
tires lose elasticity and therefore traction and
braking power. Change the tires on you rvehicle
to M+S tires .Using summe rtires at very cold
temperatures coul dcaus ecracks to form,
thereby damaging the tires permanently.
Mercedes-Benz cannot accept responsibility for
this type of damage.
GWARNING
Damaged tires can caus etire inflation pres-
sure loss. As aresult, you coul dlose control of
you rvehicle. There is arisk of accident.
Check the tires regularl yfor signs of damage
and replace any damaged tires immediately.
M+S tires
GWARNING
M+S tires with atire tread depth of less than
ã in (4 mm) are not suitable for use in winter
and do not provide sufficient traction. There is
ar isk of an accident.
M+S tires with atread depth of less than ãin
(4 mm) must be replaced immediately.
At temperatures below 45 ‡(+7 †), use winter
tires or all-season tires. Both type softire are
identified by the M+S marking.
Only winter tires bearing the isnowflake
symbol in addition to the M+S marking provide
the best possibleg rip in wintry road conditions.
Only these tires wil lallow driving safety systems
such as ABS and ESP
®to function optimally in
winter. Theset ires have beend eveloped specif-
ically for driving in snow.
Use M+S tires of the same make and tread on all
wheels to maintain safe handling characteris-
tics.
Always observe the maximu mpermissible
speeds pecified for the M+S tires you have
mounted.
When you have mounted the M+S tires:
XCheck the tire pressures (Ypag e266).
XVehicles for Canada: restart the tire pres-
sure loss warning system (Ypag e267).
XRestart the tire pressure monitor
(Ypag e267).
Information about driving with an emergency
spare wheel (
Ypag e285).
Snowc hains
GWARNING
If snow chains are installed to the front
wheels, they may drag against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tires.
There is arisk of an accident.
262Wintero peration
Wheels and tires