2018 MERCEDES-BENZ SLC ROADSTER engine

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
$J
֌
!N$ (USA only), J(Canada only): the red brake warning lamp and the yellow
ESP®,E SP®OFF and ABS warning lamp sare lit while the engine is running.
ABS and ESP®are malfunctioning.
Other driving systems and driving safety systems may als omalfunction.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels coul dtherefore lock if you brake hard ,for exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP
®is not operational ,ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additionald isplay messages in the multifunction display.
XDrive on carefully.
XVisitaqualified specialist workshopi mmediately.
÷NThe yellow ESP®warning lamp flashes while the vehicleisinm otion.
ESP®or traction control has intervened because there is arisk of skidding or at
least one wheelh as started to spin.
Cruise control or Distance Pilot DISTRONIC is deactivated.
XWhen pulling away, only depress the accelerator pedalasf ar as necessary.
XEase off the accelerator pedalwhile the vehicleisinmotion.
XAdapt yourdriving style to sui tthe road and weather conditions.
XDo not deactivate ESP®.
In rare cases (
Ypage6 1) it may be best to deactivate ESP®.
Observe the important safety notes on ESP®(Ypag e60).
÷åNThe yellow ESP®and ESP®OFF warning lamp sare lit while the engine is running.
ESP®is malfunctioning.
Other driving systems and driving safety systems may als omalfunction.
GWARNING
The brake system continues to function normally, but without the functions listed
above.
The braking distance in an emergency braking situation can thus increase.
If ESP
®is not operational ,ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additiona ldisplay messages in the multifunction display.
XDrive on carefully.
XVisitaq ualified specialist workshopi mmediately.
Warning and indicator lamps205
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
åNThe yellow ESP®OFF warning lamp is lit while the engine is running or the ECO
start/stop function is activated.
ESP
®is deactivated.
GWARNING
If ESP
®is switched off, ESP®is unable to stabilize the vehicle.
Further driving systems or driving safety systems are thus restricted.
There is an increased risk of skidding and an accident.
XReactivate ESP®.
In rare cases (
Ypage6 1) it may be best to deactivate ESP®.
Observe the important safety notes on ESP®(Ypage6 0).
XAdapt you rdriving style to sui tthe road and weather conditions.
If ESP
®cannot be activated:
XDrive on carefully.
XHave ESP®checked at aqualified specialist workshop.
MNOnly Mercedes-AMG SLC 43:
The yellow SPORT handling mode warning lamp is lit while the engine is running.
SPORT handling mode is activated.
GWARNING
When SPORT handling mode is switched on, ESP
®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XOnly switch to SPORT handling mode in accordance with the conditions descri-
bed in the "Activating/deactivating ESP" section (Ypage6 1).
F!NF (USA only), !(Canada only): the red indicator lamp for the electric
parking brake flashes or is lit and/or the yellow warning lamp for the electric
parking brake is lit.
XObserve the additiona ldisplay messages in the multifunction display.
6N The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
GWARNING
The air bagsorE mergency Tensioning Devices may either be triggeredu ninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
XObserve the additionald isplay messages in the multifunction display.
XDrive on carefully.
XContactaqualified specialist workshopa nd have the restraint system checked.
For further information about the restraint system, see (
Ypage3 8).
206Warning and indicator lamps
On-board computer and displays

Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system
Rin th efuel system
The emission limit values may be exceeded and th eengine may be in emergency
mode.
XVisitaq ualified specialist workshop immediately.
In somes tates, you must immediately visi taqualified specialist workshop as soon
as th eyellow CheckE nginew arning lamp lightsu p. This is due to thelegal require-
ments in effect in these states. If in doubt,c heck whether suchl egal regulations
apply in th estate in whichy ou are currently driving.
8NThe yellow reservef uel warning lamp lightsupw hile theengine is running.
The fuel leve lhas dropped int othe reserver ange.
XRefuel at th enearest gas station.
8NThe yellow reservef uel warning lamp flashes while th evehicle is in motion.
In addition,t he; CheckE nginew arning lamp may light up.
The fuel fille rcap is no tclosed correctly or th efuel system is leaking.
XCheckt hatthe fuel fille rcap is correctly closed.
XIf th efuelfiller cap is not correctly closed: close thefuel fille rcap.
XIf th efuelfiller cap is closed: visitaq ualified specialist workshop.
?NThe red coolant warning lamp lightsupw hile theengine is runnin gand the
coolant temperatur egauge is at th estart of th escale.
The temperatur esensor for th ecoolant temperatur egauge is malfunctioning.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XPull ove rand stop th evehicle safely and switch off th eengine ,payinga ttention
to road and traffic conditions. Do no tcontinue driving unde rany circumstances.
XSecure th evehicle against rolling away (Ypage 131).
XConsult aqualified specialist workshop.
Warning and indicator lamps207
On-boardc omputer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant levelist oo low.
If the coolant levelisc orrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooleds ufficiently.
XObserve the additionaldisplay messages in the multifunction display.
XPullover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage131).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 35).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked,e .g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature gauge is below the H
marking (Ypage1 64). Otherwise, the engine coul dbedamaged.
XDrive to the neares tqualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running.
The coolant temperature gauge has exceededt heHmarking (
Ypage1 64).The
airflow to the engine radiator may be blocked or the coolant levelm ay be too low.
GWARNING
The engine is not being cooleds ufficiently and may be damaged.
Do not drive when you rengine is overheated. This can caus esome fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can als ocaus eserious burns which can occur
just by opening the hood.
There is arisk of injury.
XObserve the additiona ldisplay messages in the multifunction display.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage131).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 35).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked,e .g. by snow,
slush or ice.
208Warning and indicator lamps
On-board computer and displays

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
XIf the coolant temperature gauge is below the Hmarking (Ypage1 64),drive on
to the next qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicleisinm otion.Awarning
tone als osounds.
You are approaching avehicle, apedestrian or astationary obstacl einyourline of
travel at too high aspeed.
XBe prepared to brake immediately.
XPay carefu lattention to the traffic situation. You may have to brake or take
evasive action.
Further information on Distance Pilot DISTRONIC (
Ypage1 40).
Further information on Active Brake Assist (
Ypag e58).
Warning and indicator lamps209
On-board computer and displays
Z

Ashtray
XTo open :push th elower section of cover :.
The cover opens.
XTo remove th einsert: lift insert =up; and
out .
XTo re-install th einsert: press insert =into
th eh older until it engages.
Cigarette lighter
GWARNIN G
You can burn yourself if you touch th ehot
heating elemen torthesocke tofthecigarette
lighter.
In addition ,flammabl ematerials can ignit eif:
Rtheh ot cigarette lighte rfall s
Rac hild hold sthe hot cigarette lighte rto
objects ,for exampl e
There is ariskoff irea nd injury.
Always hold th ecigarette lighte rbytheknob.
Always mak esuret hatthe cigarette lighte ris
out of reac hofchildren .Never leav echildren
unsupervised in th evehicle.
Your attention mus talways be focused on th e
traffic conditions. Only use th ecigarette lighte r
when road and traffic condition spermit .
XTurn th eSmartKey to position 2in th eigni-
tion loc k(Ypage 116).
XTo open :push th elower section of cover :.
The ashtray opens.
XPress in cigarette lighte r;.
Cigarette lighte r; will pop out automatically
when th eheating elemen tisred-hot .
12Vsocke ts
Gene raln otes
XTurn th eSmartKey to position 1in th eigni-
tion loc k(Ypage 116).
The sockets can be used for accessories wit ha
maximum draw of 18 0W(15 A) .Acces sorie s
include suc hitems as chargers for mobile
phones.
If you use th esockets for lon gperiods when th e
engin eisswitched off ,the battery may dis-
charge .
iAn emergenc ycut-out ensures that th eon-
boar dvoltag edoes no tdropt oo low. If th eon-
boar dvoltag eistoolow, th epowe rtot he
sockets is automatically cut .This ensures
that there is sufficien tpowe rtos tart th e
engine.
Socket in th efront center console
XTo open :push th elower section of cover :.
The stowage compartmen topens.
XLiftupt hecover of socke t;.
Features223
Stowage and features
Z

sage appears, follow the customer service
representative's instructions.
The message in the displaydisappears.
If you select Cancel
the remote malfunction
diagnosis is canceled completely.
The vehicle operating state check begins. You
will see the Vehicle
diagnosisactivatedmessage.
When the diagnosis is completed, the Trans‐
fer vehicle diagnostics data (Voiceconnection may be interrupted duringdatatransfer)message appears. The vehicle
data can now be sent to the Customer Assis-
tance center.
XPress OKto confirm the message.
The voice connection with the Customer
Assistance Center is terminated.
You will see the Vehicle diagnosis:
Transferring data...message.
The vehicle data is sent to the Customer
Assistance Center.
Depending on what the customer service rep-
resentative agreed with you, the voice connec-
tion is re-established after the transfer is com-
plete. If necessary, you will be contacted at a
later time by another means, e.g. by e-mail or
phone.
Another function of the Vehicle Health Check is
the transfer of service data to the Customer
Assistance Center. If aservice is overdue, the
COMAND displays howsamessage about vari-
ous special offers at your workshop.
USA only: this information can also be called up
under "Owners Online" at http://
www.mbusa.com.
Information on the data stored in the vehicle
(
Ypage 28).
Information on Roadside Assistance
(
Ypage 25).
Garage door opener
General notes
The HomeLink®garage door opener integrated
in the rear-view mirror allowsy ou to operate up
to three different door and gate systems.
Use the integrated garage door opener only on
garage doors that:
Rhave safety stop and reverse features and
Rmeet current U.S. federal safety standards Once programed, the integrated garage door
opener in the rear-view mirror will assume the
function of the garage door system's remote
control. Please also read the operating instruc-
tions for the garage door system.
When programming
agarage door opener, park
the vehicle outside the garage. Do not run the
engine while programming.
Certain garage door drives are incompatible
with the integrated garage door opener. If you
have difficulty programing the integrated garage door opener, contact an authorized Mercedes-
Benz Center.
Alternatively, you can call the following tele-
phone assistance services:
RUSA: Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
RCanada: Customer Service at
1-800-387-0100
RHomeLink®hotline 1-800-355-3515 (free of
charge)
More information on HomeLink
®and/or com-
patible products is also available online at
http://www.homelink.com.
Notes on the declaration of conformity
(
Ypage 26).
USA: FCC ID: CB2HMIHL4
Canada:I C: 279B-HMIHL4
Important safety notes
GWARNING
When you operate or program the garage door
with the integrated garage door opener, per-
sons in the range of movement of the garage
door can become trapped or struck by the
garage door. There is arisk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the garage
door.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
228Features
Stowage and features

Engine compartment
Hood
Important safety notes
GWARNING
If th ehood is unlatched, it may open up when
th ev ehicle is in motion and blocky our view.
Thereisar isk of an accident.
Never unlatch th ehood while driving .Before
ever ytrip, ensure that th ehood is locked.
GWARNING
When opening and closingt hehood,itm ay
suddenly fall int othe closed position.T hereis
ar isk of injury to personsw ithin range of
movementoft hehood.
Open and close th ehood only when no onei s
within its range of movement.
GWARNING
Opening th ehood when th eengine is over-
heated or when there is afireint heengine
compartmen tcoul de xpose you to hot gases
or other servic eproducts. Thereisar isk of
injury.
Let an overheate dengine coo ldown before
opening th ehood.Ift here is afireint he
engine compartment, keep th ehood closed
and contac tthe fired epartment.
GWARNING
The engine compartmen tcontain smoving
components. Certain components, sucha s
th er adiator fan ,may continue to run or start
again suddenly when th eignition is off .There
is ar isk of injury.
If you nee dtodoany work inside th eengine
compartment:
Rswitch off th eignition
Rnever reac hintot he area wheret here is a
risk of danger from moving components,
suchast hefan rotatio narea
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
Opening th ehood
GWARNING
Certain component sintheengine compart-
ment, suchast heengine ,radiator and parts
of th eexhaust system, can become ver yhot.
Workin gintheengine compartmen tposesa
risk of injury.
Wherep ossible, let th eengine coo ldown and
touch only th ecomponent sdescribe dinthe
following.
GWARNING
When th ehood is open and th ewindshield
wipersa re set in motion,y ou can be injured by
th ew iper linkage. Thereisar isk of injury.
Always switch off th ewindshield wipersa nd
th ei gnition before opening th ehood.
!Makes ure that th ewindshield wipersa re
no tfolded away from th ewindshield. You
coul dotherwise damag ethe windshield wip-
ers or th ehood.
XMakes ure that th ewindshield wipersa re
turned off.
XPull release lever :on th ehood.
The hood is released.
Engine compartment233
Maintenance and care
Z