2018 MERCEDES-BENZ SLC ROADSTER ECU

Vehicles withaTIREFI Tkit
:Tire sealant fille rbottle
;Fus ealloc ation chart
=Tire inflation compressor
?Towing eye
XLiftthe trunk floor up.
XUse the TIREFIT kit (Ypage 247).
iExample :equipment and country-specific
variations possible.
Vehicles with acolla psibl espare wheel
The collapsibl espare whee lcan be found in the
stowag ewellu nder the trunk floor (Ypage 221).
:Folding whee lchock
;Fus ealloc ation chart
=Jack
?Shee tfor faulty wheel
AAlignment bolt
BLugw rench
CTowing eye
DValve extractor
ETire inflation compressor
XRemove the collapsibl espare wheel
(Ypage 286).
Flat tire
Preparin gthe vehicle
Your vehicl emaybe equipped with:
Rtire sw ithr un-fla tcharacteristics
(MOExtended tires) (Ypage 247)
Vehicl epreparation is not necessary on vehi-
cle sw ithM OExtende dtires
Ran emergency spare whee l(Ypage 285)
Vehicles with the Mercedes-Benz emer-
genc ycalls ystem: in the event of aflatt ire ,you
can contact the Mercedes-Benz emergency call
system customerc enter.
Vehicles equipped with MOExtende dtiresa re
not equipped with aTIREFIT kit at the factory .It
is therefore recommende dthaty ouadditionally
equi pyourvehicl ewithaT IREFIT kit if yo umount
tire sthatd onot feature run-fla tcharacteristics,
e.g .winter tires. ATIREFIT kit maybeo btained
from aquali fied specialist workshop.
Informatio nonchanging and mounting wheels
(
Ypage 280).
XStop the vehicl eonsolid,non-slippery and
level ground ,asfar away as possibl efrom
traffic.
XSwitch on the hazard warning lamps.
XSecure the vehicl eagain st rolling away
(Ypage 131).
XIf possible, bring the front wheels into the
straight-ahea dposition.
XSwitch off the engine.
XVehicles withou tKEYLESS -GO:remove the
SmartKey from the ignition lock.
XVehicles with KEYLESS-GO: open the driv-
er' sd oor.
T he vehicl eelectronics now have status 0.
Thi sist he same as the SmartKey having been
removed.
XVehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(
Ypage 116).
XMake sure thatt he passengersare not endan-
gered as they do so. Make sure thatnoo ne is
nea rthe danger are awhile awheel is being
changed .Anyone wh oisnot directlya ssisting
in the whee lchange should, for example,
stand behind the barrier.
XGe toutof the vehicle. Paya ttentiontotraffic
conditions when doing so.
XClose the driver'sd oor.
246Flat tire
Breakdo wn assis tance

rubbish. They must be col-
lected separately and dis-
posed of in an environmen-
tallyresponsible recycling
system.
Dispose of batterie sinan
environmentally responsi-
ble manner. Take dis-
charge dbatterie stoaq uali-
fied specialist workshop or
to ac ollection point for
used batteries.
!Have the battery checked regularl yata
qualified specialist workshop.
Observe the service interval sinthe Mainte-
nance Booklet or contact aqualified specialist
workshop for more information.
!Always have work on batterie scarrie dout at
aq ualified specialist workshop.
Shoul dit, in exceptionalc ircumstances, be
absolutel ynecessary to disconnect the 12-
volt battery yourself, please observe the fol-
lowing:
RSecure the vehicletop revent it from rolling
away.
RSwitch off the ignition.
RDisconnect the negative terminal first and
then the positive terminal.
The transmission is locked in position j
after disconnecting the battery.
After the work has been done, install the bat- tery and replace the cover of the positive ter-
minal clamp firmly.
Comply with safety precautions and take pro-
tective measures when handling batteries.
Ris kofe xplosion.
Fire, open flame sand smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
Battery acid is caustic. Avoid contact
with skin, eye sorclothing.
Wears uitable protective clothing,
especially gloves, apro nand face-
guard. Rinse any acid spills immediately
with clearw
ater. Contact aphysician
if necessary.
Weare ye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batterie swhich have
been tested and approved for you rvehicleb y
Mercedes-Benz. These batterie sprovide
increase dimpact protection to prevent vehicle
occupants from suffering acid burns should the
battery be damaged in the event of an accident.
In order for the battery to achieve the maximum
possible service life,itm ust alwaysbesuffi-
ciently charged.
Like other batteries, the vehicleb attery may
discharge over time if you do not use the vehicle.
In this case, have the battery disconnected at a
qualified specialist workshop.Y ou can also
charge the battery with acharge rrecommended
by Mercedes-Benz. Contact aqualified special-
ist workshop for further information.
Have the battery condition of charge checked
more frequently if you use the vehiclem ainlyfor
short trips or if you leave it standing idlef or a
lengthy period. Consult aqualified specialist
workshop if you wis htoleave you rvehicle
parked for along periodoft ime.
Remove the SmartKey if you park the vehicle
and do not require any electricalc onsumers.
The vehiclew illt hen use very little energy,t hus
conserving battery power.
If the powers upply has been interrupted ,e.g. if
you reconnect the battery ,you wil lhave to:
Rreset the function for automatically folding
the exterior mirrors in/out by folding the mir-
rors out once (
Ypag e91)
Rset the clock
On vehicles with amultimedia system, the
time is set automatically.
252Battery (vehicle)
Breakdown assistance

GWARNING
During the charging process,ab attery produces hydrogen gas. If ashort circui toccurs or sparks
are created ,the hydrogen gas can ignite. There is arisk of an explosion.
RMake sure that the positive terminal of aconnected battery does not come into contact with
vehiclep arts.
RNever place metal objects or tools on abattery.
RIt is important that you observe the described order of the battery terminal swhen connecting
and disconnecting abattery.
RWhen jump-starting, make sure that the battery polesw ith identical polarity are connected.
RIt is particularlyimportant to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnect the battery terminal swhile the engine is running.
GWARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting the
vehicleorc harging the battery,g asescan escap efrom the battery.T here isarisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
!Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter coul dbe
damaged by the non-combusted fuel.
If the indicator/warning lamp sdonot light up at low temperatures, it is very likelyt hat the dis-
charge dbattery has frozen. In this case, you may neither charge the battery nor jump-start the
vehicle. The service life of athawed-out battery may be shorter. The starting characteristics can be
impaired,p articularlyatlow temperatures. Have the thawed-out battery checked at aqualified
specialist workshop.
Do not start the vehicleu singarapi dc harging device. If you rvehicle's battery is discharged, the
engine can be jump-started from another vehicleorf romasecond battery using jumper cables.
Observe the following points:
RThe battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,j ump-
start the vehicleu singasecond battery or ajump-starting device.
RYou may only jump-start the vehiclew hen the engine and exhaust system are cold.
RDo not start the engine if the battery is frozen. Let the battery thaw first.
ROnly jump-start from batterieswitha12Vv oltagerating.
ROnly use jumper cables which have asufficient cross-section and insulated terminal clamps.
RIf the battery is full ydischarged, leave the battery that is being used to jump-start connected for
af ew minutes before attempting to start. This charge sthe battery slightly.
RMake sure that the two vehicles do not touch.
Make sure that:
RThe jumper cables are not damaged.
RBare parts of the terminal clamp do not come into contact with other metal parts while the jumper
cables are connected to the battery.
RThe jumper cables cannot come into contact with parts which can move when the engine is
running, such as the V-belt pulley or the fan.
XSecure the vehiclebyapplying the electric parking brake.
XShift the transmission to position j.
254Jump-starting
Breakdown assistance

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

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

Important notes on tire pressure
GWARNING
If th etirep ressur edrops repeatedly, th e
wheel, valv eortirem ay be damaged. Tir e
pressur ethatist oolow may result in atire
blow-out .Ther eisar iskofana ccident.
RCheckthe tire for foreign objects .
RCheckwhether th ewhee lislosing air or th e
valv eisl eaking .
If you are unable to rectify th edamage, con-
tac taq ualified specialist workshop.
GWARNIN G
If you fit unsuitable accessories onto tire
valves, th etirev alves may be overloaded and
malfunction ,whic hc an caus etirep ressur e
loss .Due to their design ,retrofitte dtirep res-
sur em onitors keep th etirev alveo pen .This
can also result in tire pressur eloss .Ther eisa
ris kofana ccident.
Only screw th estandard valv ecap or other
valv ecapsa pprove dbyMercedes-Ben zfor
your vehicl eontot he tire valve.
Use asuitable pressur egauge to chec kthe tire
pressure. The outer appearanc eofatired oes
no tp ermit any reliable conclusio nabout th etire
pressure. On vehicles equipped wit hthe elec -
tronic tire pressur emonitor, th etirep ressur e
can be checke dintheon-board computer.
The tire temperature and pressur eincreas e
when th evehicl eisinm otion.This is dependen t
on th edriving spee dand th eload.
Therefore, you should only correc ttirep res-
sures when th etires are cold.
The tires are cold:
Rif th evehicl ehas been parked wit hthe tires
out of direct sunligh tfor at least three hour s
and
Rif th evehicl ehas no tbeen driven further than
1m ile (1. 6km)
The tire temperature changes depending on th e
outside temperature, th evehicl espee dand th e
tire load. If th etiret
em p
erature changes by
18 ‡(10 †), th etirep ressur echanges by
approximately 10 kP a(0.1b ar/1.5 psi) .Take
this int oaccoun twhen checkin gthe pressur eof
warm tires .Onlyc orrect thet irep ressur eifitisto
ol ow for th ecurren toperating conditions. If
you chec kthe tire pressur ewhen th etires are
warm ,the resulting value will be higher than if
th et ires were cold. This is normal. Do no t
reduce th etirep ressur etothevalue specifie d
for cold tires .The tire pressur ewould otherwise
be to olow.
Observ ethe recommended tire pressures for
cold tires :
Ron theTirea nd Loading Information placard
on th eB-pillar on th edriver' sside
Rin th etirep ressur etable on th einside of th e
fuel filler flap
Rprinte dinyellow on th erim of th eemer-
gency/collapsible spar ewhee l(dependin gon
vehicl eequipment)
Underinflated or overinflated tires
Underinflated tires
GWARNIN G
Tires wit hpressur ethatist oolow can over-
heat and burs tasaconsequence .Inaddition ,
they also suffer from excessiv eand/o rirreg-
ular wear, whic hcan severely impair th ebrak -
ing properties and th edriving characteristics .
Ther eisar iskofana ccident.
Avoid tire pressures that are to olow in all th e
tires ,includin gthe spar ewheel.
Underinflated tires may:
Roverheat, leadin gtotired efects
Radversely affec thandlin g
Rwear excessively and/o runevenly
Rhav eana dverse effec tonfuel consumption
Overinflated tires
GWARNIN G
Tires wit hexces sively high pressur ecan burs t
because they are damaged mor eeasil yby
road debris, pothole setc.Ina ddition ,the y
also suffer from irregular wear ,whic hc an
severely impair th ebraking properties and th e
driving characteristics .Ther eisar iskofa n
accident.
Tire pressure265
Wheels and tires
Z