2018 MERCEDES-BENZ SLC ROADSTER heating

Problems with the transmission
ProblemPossible causes/consequences andMSolutions
The transmission has
problems shifting gear.The transmission is losing oil.
XHave the transmission checked ataqualified specialist workshop
immediately.
The acceleration ability
is deteriorating.
The transmission no lon-
ger changes gear.The transmission is in emergency mode.
It is only partly possible to engage the gears, or the transmission is in
position i.
XStop the vehicle.
XShift the transmission to position j.
XSwitch off the engine.
XWait at least ten seconds before restarting the engine.
XShift the transmission to positionhork.
XHave the transmission checked at aqualified specialist workshop
immediately.
Refueling
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is arisk of fire and explo-
sion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is arisk of injury.
You must make sure that fuel does not come into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
RIf fuel is swallowed, seek medical assis-
tance without delay.Don ot induce vomit-
ing.
RImmediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildupc an create sparks and
ignite fuel vapors. There is arisk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildupi s
thereby discharged.
Do not get into the vehicle again during the refu-
eling process. Otherwise, electrostatic charge
could build up again.
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system. Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify aqualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
Refueling129
Driving and parking
Z

In addition to driving style, the actual consump-
tion is affected by other factors, such as:
Rload
Rtire pressure
Rcold start
Rchoice of route
Ractive electrical consumers
These factors are not includedint he ECO dis-
play.
An economical driving style specially requires
driving at moderate engine speeds.
Achieving ahigher valueint he categories
"Acceleration" and "Constant":
Robserve the gearshift recommendations.
Rdrive the vehicle in drive program Cor E.
In urbant raffic and stop-start traffic, drive pro-
gram Cis recommended.
On long journeys at aconstant speed,e .g. on the
highway, only the outer area for "constant" will
change.
The ECO display summarizes the driving style
from the start of the journey to its completion.
Therefore, there are more marked changes in
the outer areasatt he start ofajourney. On lon-
ger journeys, there are fewer changes. For more
marked changes, perform amanua lrest
(
Ypage 167).
Further information on the ECO display
(
Ypage 166).
Braking
Important safety notes
GWARNING
If you shift down on aslippery road surface in
an attempt to increase the engine's braking
effect, the drive wheelsc ould lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on aslippery road surface.
Downhill gradients
!On long, steep gradients, you must reduce
the load on the brakes. To use engine braking,
shift to alowerg ear in good time. This helps you to avoid overheating the brakes and wear-
ing them out excessively.
When making use of the engine braking
effect, it is possible that
adrive wheel may not
turn for some time, e.g. in the case of sud-
denly changing or slippery road surface con-
ditions. This could cause damage to the drive
train. This type of damage is not covered by
the Mercedes-Benz warranty.
Change into alowerg ear in good time on long
and steep downhill gradients. This is especially
important if the vehicle is laden.
This also applies if you have activated cruise
control or Distance PilotD ISTRONIC.
Heavy and light loads
GWARNING
If you rest you rfoot on the brake pedalw hile
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail.T here is a
risk of an accident.
Never use the brake pedalasaf ootrest. Never
depresst he brake pedala nd the accelerator
pedalatt he same time.
!Depressing the brake pedalc onstantly
results in excessive and premature weart o
the brake pads.
If the brakes have been subjected to aheavy
load,don ot stop the vehicle immediately,b ut
drive on for ashort while. This allows the airflow
to cool the brakes more quickly.
Wet roads
If you have driven for along time in heavy rain
withoutb raking, there may be adelayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You then have to depresst he brake pedalmore
firmly.M aintainagreater distance from the
vehicle in front.
After driving on awet road or having the vehicle
washed, brake firmly whilep aying attention to
the traffic conditions. This willw arm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.
136Driving tips
Driving and parking

legal speed limitspermit. Otherwise, sudden
and unexpected acceleration or deceleration
of the vehicle could cause an accident and/or serious injury to you and others.
XTo adjust th eset speed in 1mphincre-
ment s(1k m/hincrements): briefly press
the cruis econtrol lever up :to the pressure
point for ahigher speed, or down ?for a
lower speed.
Every tim ethe cruis econtrol lever is pressed
up or down, the last speed stored is increased
or reduced.
XTo adjust th eset speed in 5mphincre-
ment s(10 km/h increments): briefly press
the cruis econtrol lever up :past the pres-
sure point for ahigher speed, or down ?for
al ower speed.
Every tim ethe cruis econtrol lever is pressed
up or down, the last speed stored is increased or reduced.
iThe speed indicated in the speedometer
may differs lightly fromt he speed stored.
iCruise control is not deactivate difyou
depresst he accelerator pedal. For example, if
you accelerateb riefly to overtake, cruis econ-
trol adjust sthe vehicle's speed to the last
speed stored after you have finished overtak-
ing.
Deactivating cruise control
There are several ways to deactivate cruis econ-
trol:
XBriefly press the cruis econtrol lever for-
wards :.
or
XBrake. Cruise control is automatically deactivated if:
Ryou engag
ethe electric parking brake
Ryou are drivingatl ess than 20 mph (3 0km/ h)
RESP®intervenes or you deactivateE SP®
Ron vehicles with manual transmission,y ou
shift to agear that is too high, and as aresult
the engin espeed is too low
RBrak eAssist intervenes
Ryou move out of transmission position h
If cruis econtrol is deactivated, you will hear a
warnin gtone. You will see the Cruise Con‐
trol Offmessage in the multifunction display
for approximately five seconds.
iWhen you switc hoff the engine, the last
speed stored is cleared.
Distance Pilot DISTRONIC
General notes
Distanc eAssist DISTRONIC regulates the speed
and automatically helps you maintain the dis-
tance fromt he vehicle detected in front .Vehi-
cles are detected with the aid of the radar sen-
sor system. Distanc eAssist DISTRONIC brakes
automatically to avoid exceeding the set speed
or to maintain the designated distanc efromt he
vehicle in front.
Change int oalower gear in good tim eonlong
and steep downhill gradients. This is especially
importan tifthe vehicle is laden. By doing so, you
will make use of the braking effect of the engine.
This relieves the load on the brakes ystem and
prevent sthe brakes fromo verheatingand wear-
ing too quickly.
If Distanc eAssist DISTRONIC detect sthat there
is ar isk of acollision with the vehicle in front,
you will be warne dvisually and audibly. Distance
Assist DISTRONIC cannot prevent acollision
without your intervention. An intermitten twarn-
ing ton ewill the nsound and the distanc ewarn-
ing lamp will light up in the instrumentc luster.
Brak eimmediately in order to increase the dis-
tance fromt he vehicle in front ,ortakee vasive
action, provided it is safe to do so.
For Distanc eAssist DISTRONIC to assist you
when driving, the radar sensor system must be
operational.
Distanc eAssist DISTRONIC operates in the
speed rang ebetwee n0mph (0 km/h) and
120 mph (200 km/h).
140Driving systems
Driving and parking

Reversible floor panelinthe trunk
The trunk floor is level when yo uusethe outer
sid eoft he reversibl efloor panel.Ify outurn the
floor panel over, yo ucan transpor tobjects such
as ab everage crate on the undersid eofthe
panel.
Twof lexible straps ;are attached to the rever-
sible floor panel,u sethesetos ecure objects,
such as wind screen =,whenr eversibl efloor
panel :hasb eent urne dover.
Roo fcarrier
!
Thisv ehicleisn ot designed to transport
item sont he roof. Roof carriers and other
device swhich are mounted on the rooft hat
have not bee nspecifically approved for this
model by Mercedes-Benz mus tnot be used as
they could damag ethe vehicl eand the
retractable hardto p(vario-roof).
At the time of going to print, Mercedes-Benz
doe snot offera ny roofcarrieroro therr oof-
installed device sfor this model.
!Thisv ehicleisn ot designed to transpor tany
item sont he trunk li dortoallowluggage car-
riers or equipment of any kind to be installed to the trunk lid. Otherwise the vehicl
eand the
retractable hardto pcould be damaged.
Features
Cup holder
Important safety notes
GWARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
throwna round and hit vehicl eoccupants. In
addition, cup holders, ope nstowag espaces
and mobil ephone brackets canno talway s
retain al lobjects they contain. There is arisk
of injury, particularly in the event of sudden
braking or asudde nchange in direction.
RAlway sstow objects so that they canno tbe
throwna round in such situations.
RAlwaysmake sure that objects do not pro-
trud efrom stowag espaces, parcel nets or
stowag enets.
RClose the lockable stowag espaces before
starting ajourney.
RAlway sstow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
GWARNING
The heating elements of the cup holder can
become very hot. Yo ucould burn yourselfo n
them.
There is ariskofi njury.
Do not touch the hot heating elements of the
cup holder .Alway smake sure that children
canno taccess the hot heating elements of the
cup holder .Neverl eave children unsuper-
vised in the vehicle.
!Only us ethe cup holder sfor containers of
the right size and which have lids. The drinks could otherwise spill.
!Do not expose drinks bottles in the cup
holder in the center console to continuous,
strong and direct sunlight. The passenger
compartment in the are aofthe center con-
Features221
Stowage and features
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

Observe the notes in the section on the care and
treatment of matt paintwork (Ypage 240);
these notes also apply to decorative film.
To clean, use plenty of water and amild cleaning
agent without additional or abrasive products,
e.g. acar shampoo approved by Mercedes-
Benz.
XRemove bird droppings, tree resin or fuel as
soon as possible.
The decorative film may be irreparably dam-
aged.
XDry vehicles covered with film using asoft,
absorbent cloth after every wash.
Water marks could otherwise form.
Scratches, corrosive deposits, areas affected by
corrosion and damage caused by inadequate
care cannot always be completely repaired. In
such cases, visit aqualified specialist workshop.
The cleaning product Paint Cleaner, which has
been approved and recommended by
Mercedes-Benz,s hould be used when dirt has
penetrated the decorative film surface or the
decorative film has become dull.
The manufacturer can provide you with infor-
mation on special care and cleaning products.
Surfaces covered with film may appears hinier
after the decorative film has been removed.
iHave work or repairs on decorative film car-
ried out at aqualified specialist workshop.
Mercedes-Benz recommends that you use an
authorized Mercedes-Benz Center for this
purpose.
Cleaning the vehiclep arts
Cleaning the wheels
GWARNING
The water jet from acircular jet nozzle (dirt
blasters) can cause invisible exterior damage
to the tires or chassis components. Compo-
nentsd amaged in this way may fail unexpect-
edly.T here is arisk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged
tires or chassis componentsr eplaced imme-
diately.
!Do not use acidic wheel cleaning products
to remove brake dust. This could damage
wheel bolts and brake components.
!Do not park your vehicle for along period of
time directly after cleaning, particularlya fter
cleaning the wheel rim with wheel cleaner.
Wheel cleaner can lead to the increased cor-
rosion of the brake discs and pads. Therefore,
drive for afew minutes after cleaning. By
heating up the brakes, the brake discs and
pads dry. The vehicle can then be parked for a
long period of time.
Cleaning the windows
GWARNING
You could become trapped by the windshield wipers if they start moving while cleaning the
windshieldorw iper blades. There is arisk of
injury.
Alwayss witch off the windshieldw ipers and
the ignition before cleaning the windshieldo r
wiper blades.
!Do not use dry cloths, abrasive products,
solvents or cleaning agents containing sol-
vents to clean the inside of the windows. Do
not touch the insides of the windows with
hard objects, e.g. an ice scraper or ring. There
is otherwise arisk of damaging the windows.
!Cleant he water drainage channels of the
windshielda nd the rear window at regular
intervals. Deposits such as leaves, petals and pollen may under certain circumstances pre-
vent water from draining away. This can lead
to corrosion damage and damage to elec-
tronic components.
XCleant he inside and outside of the windows
with adamp cloth and acleaning product that
is recommended and approved by Mercedes-
Benz.
Cleaning wiper blades
GWARNING
If the windshieldw ipers are set in motion
while you are cleaning the windshield, you can be trapped by the wiper arm. There is arisk of
injury.
Care241
Maintenance and care
Z

Other identifications, for example:
R0W-30
R5W-30
R5W-40
Fuel
Important safety notes
GWARNING
Fuel is highly flammable. Improper handling of
fuel creates arisk of fire and explosion.
Avoid fire, open flames, smoking and creating
sparks under all circumstances. Switch off the
engine and, if applicable, the auxiliary heating
before refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is arisk of injury.
You must make sure that fuel does not come into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel awayf rom children.
If you or others come into contact with fuel,
observe the following:
RWash awayf uel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
RIf fuel is swallowed, seek medical assis-
tance without delay.Don ot induce vomit-
ing.
RImmediately change out of clothing which
has come into contact with fuel.
Tank capacity
ModelTotal capa- city
SLC 30018.5 US gal(70.0 l)
Mercedes‑AM Gvehicles15.8 US gal
(60.0 l)
ModelOf which
reserve
SLC 300Approx.
2.4 US gal (9.0 l)
Mercedes‑AM GvehiclesApprox.
2.1 US gal (8.0 l)
Gasoline
Fuel grade
!Do not use diesel to refue lvehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refue lwith the wrong fuel.
Otherwise, the fuel wille nter the fuel system.
Even smal lamounts of the wrong fuel could
resul tind amage to the fuel system and the
engine. Notify aqualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
!Only refue lusing unleaded premium grade
gasoline with at least 91 AKI/95 RON.
iE10 fuel contains up to 10% bioethanol.
Yourv ehicleisE 10-compatible. You can
refue lyou rv ehicleu sing E10 fuel.
!Only use the fuel recommended. Operating
the vehiclew ith other fuelscan leadtod am-
age to the fuel system, engine and exhaust
system.
!Do not use the following:
RGasoline with more than 10% ethanol
RE100 (100% ethanol)
RGasoline with methanol
RM100 (100% methanol)
RGasoline with metalliferous additives
RDiesel
Service products and fillingc apacities291
Technical data
Z

ModelMB-Freigabe orMB-Approval
All models229.5
iMB approval is indicated on the oil contain-
ers.
Fillingc apacities
The following values refer to an oil change
including the oil filter.
ModelCapacity
SLC 3006.7 US qt (6.3 l)
Mercedes-AMG
SLC 436.9 US qt (6.5l)
Additives
!Do not us eany additive sinthe engine oil.
Thisc ould damag ethe engine.
Brake fluid
GWARNING
The brake fluid constantly absorbsm oisture
from the air. Thisl owersthe boiling point of
the brake fluid .Ifthe boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. Thisw ouldimpai rbraking efficiency.
There is ariskofana ccident.
Yo us houl dhavet he brake fluid renewe dat
the specified intervals.
Whe nhandling brake fluid ,observe the impor-
tant safety notes on service products
(
Ypage 290).
The brake fluid change interval scan be found in
the Maintenance Booklet.
Only us ebrake fluid approved by Mercedes-
Benz in accordance with MB-Freigab eorMB-
Approval3 31.0.
Information abouta pproved brake fluid can be
obtaine datany qualified specialist workshopo r
on the Interneta t
http://bevo.mercedes-benz.co m.
iHave the brake fluid regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Coolant
Importan tsafety notes
GWARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is arisk of fire and injury.
Let the engine cool downb efore youadd anti-
freeze.M ake surethat antifreeze is not spilled
next to the filler neck. Thoroughly clea nthe
antifreeze from components before starting
the engine.
!Only ad dcoolant that has beenp remixed
with the desire dantifreeze protection. You
coul dotherwise damag ethe engine.
Furthe rinformatio noncoolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB BeVo 310.1, e.g. on the
Internet at
http://bevo.mercedes-benz.com.Orc on-
tact aqualifie dspecialist workshop.
!Always use asuitabl ecoolant mixture, even
in countries where hig htemperatures prevail.
Otherwise ,the engine cooling system is not
sufficiently protected from corrosion and
overheating.
iHave the coolant regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Comply with the important safety precautions
for service products whe nhandling coolant
(
Ypage 290).
The coolant is amixture of water and anti-
freeze/corrosion inhibitor. It is responsible for
the following:
Ranti-corrosion protection
Rantifreeze protection
Rraising the boiling point
If the coolant has antifreeze protection downt o
-35 ‡(-37† ), the boiling point of the coolant
during operation is approximatel y266 ‡
(130 †).
Service products and filling capacities293
Technical data
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