2017 MERCEDES-BENZ SLC check engine

G WARNING
If engine oil comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is ar isk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck. Let the engine cool dow na nd
thoroughly clea nt he engine oil off the com-
ponents before starting the engine.
H Environmental note
When adding oil ,t ake care not to spil la ny. If
oil enters the soil or waterways, it is harmfu lt o
the environment.
! Only use engine oil sa nd oil filters that have
been approved for vehicles with as ervice sys-
tem. You can obtai nal ist of the engine oils
and oil filters tested and approved in accord-
ance with the Mercedes-Benz Specifications
for Service Products at any Mercedes-Benz
Service center.
Damag etot he engine or exhaust system is
caused by the following: R
using engine oil sa nd oil filters that have not
been specifically approved for the service
system R
replacing engine oil and oil filters after the
interval for replacement specified by the
service system has been exceeded R
using engine oil additives.
! Do not add too much oil .Ift he oil leve li s
above the "max" mark on the dipstick, too
much oil has been added. This can lea dt o
damage to the engine or the catalytic con-
verter. Have excess oil siphoned off.
Example :e ngine oil cap X
Turn cap C counter-clockwise and remove it. X
Add engine oil.
If the oil leve lisatorb elow the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 liter) of
engine oil. X
Replace cap C on the filler neck and turn
clockwise.
Ensure that the cap locks into place securely. X
Check the oil leve la gain with the oil dipstick
( Y
pag e2 32).
Further information on engine oil ( Y
pag e2 86).
Checkin ga nd adding other service
products
Checkin gc oo lan tl evel
G WARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible ,l et the engine cool dow na nd
touch only the components described in the
following.
G WARNING
The cooling system is pressurized, particularly
when the motor is warm .Ify ou open the cap,
you coul dbes calded if hot coolant sprays out.
There is ar isk of injury.
Let the engine cool dow nb efore you open the
cap. Wea rg love sa nd eye protection. Slowly
open the cap to relieve pressure.
ExampleEngine compartment 233
Maintenance and care Z

X
Park the vehicle on al evel surface.
Only check the coolant level when the vehicle
is on al evel surface and the engine has cooled
down. X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 115).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice ( Y
page 115).X
Check the coolant temperature gauge in the
multifunction display.
The coolant temperature must be below
158 ‡( 70 †).X
Turn the SmartKey to position 0 ( Y
page 115)
in the ignition lock. X
Slowly turn cap D half at urn counter-clock-
wise to allow excess pressure to escape. X
Turn cap D further counter-clockwise and
remove it.
If the coolant is at the level of marker bar

X
If possible, bring the front wheel si nto the
straight-ahea dp osition.X
Switch off the engine. X
Vehicles without KEYLESS-GO: remove the
SmartKey from the ignition lock. X
Vehicles with KEYLESS-GO: open the driv-
er's door.
The on-board electronics now have status 0 .
This is the same as the SmartKey having been
removed. X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
( Y
page 115).X
Make sure that the passengers are not endan-
gered as they do so. Make sure that no one is
near the danger area whil eaw heel is being
changed. Anyone who is not directly assisting
in the wheel change should, for example,
stand behind the barrier. X
Get out of the vehicle .P ay attention to traffic
conditions when doing so. X
Clos et he driver's door.
MOExtended tires (tires with run-flat
properties)
General notes With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive you rv ehi-
cle even if there is at otal loss of pressure in one
or more tires. The affected tire must not show
any clearl yv isible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You wil lf ind this marking
next to the tire size designation, the load-bear-
ing capacity and the speed index ( Y
page 269).
MOExtended tires may only be used in conjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor.
If ap ressure loss warning message appears
in the multifunction display: R
observe the instructions in the display mes-
sages ( Y
page 196).R
check the tire for damage. R
if driving on, observe the following notes.
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the vehi-
cle is partially laden and approximately 19 miles
(30 km) when the vehicle is full yl aden. In addition to the vehicle load ,t he driving dis-
tance possible depends upon: R
vehicle speed R
road condition R
outsid et emperature
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-flat mode is
counted from the moment the tire pressure loss
warning appears in the multifunction display.
You must not exceed am aximum speed of
50 mph (80 km/h).
When replacing one or all tires, please observe
the following specifications for you rv ehicle's
tires: R
size R
type and R
the "MOExtended" mark
If at ire has gone flat and cannot be replaced
with aM OExtended tire, as tandard tire may be
used as at emporary measure. Make sure that
you use the proper size and type (summe ro r
winter tire).
Vehicle se quipped with MOExtended tires are
not equipped with aT IREFIT kit at the factory. It
is therefore recommended that you additionally
equi py ou rv ehicle with aT IREFIT kit if y ou mount
tires
that do not feature run-flat properties, e.g.
winter tires. AT IREFIT kit is available, for exam-
ple, from aq ualifie ds pecialist workshop.
Important safety notes
G WARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is ar isk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacle s( curbs, potholes,
off-road). This applies in particular to al aden
vehicle.
Stop driving in emergency mode if: R
you hear banging noises. R
the vehicle starts to shake.242
Flat tire
Breakdow na ssistance

The vehicle will then use very little energy, thus
conserving battery power.
If the power supply has been interrupted, e.g. if
you reconnect the battery, you will have to: R
reset the function for automatically folding
the exterior mirrors in/out by folding the mir-
rors out once ( Y
page 89)R
set the clock (see the Digital Operator's Man-
ual)
On vehicles with am ultimedia system, the
time is set automatically.
Charging the battery
G WARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a
risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean over ab attery.
G WARNING
Battery acid is caustic. There is ar isk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion.
G WARNING
Ad ischarged battery can freeze at tempera-
tures below freezin gp oint. When jump-start-
ing the vehicle or charging the battery, gases
can escape from the battery. There is ar isk of
an explosion.
Allow the frozen battery to thaw out before
charging it or jump-starting.
! Only use battery chargers with am aximum
charging voltage of 14.8 V.
! Only charge the battery using the jump-
starting connection point.
The jump-starting connection point is in the
engine compartment. If the indicator/warning lamps do not light up at
low temperatures, it is very likely that the dis-
charged battery has frozen. In this case, you
may neither charge the battery nor jump-start
the vehicle. The service life of at hawed-out bat-
tery may be shorter .T he starting characteristics
can be impaired, particularly at low tempera-
tures. Have the thawed-out battery checked at a
qualified specialist workshop.
Read the battery charger's operating instruc-
tions before charging the battery. X
Open the hood. X
Connec tt he battery charger to the positive
terminal and ground point in the same order
as when connectin gt he donor battery in the
jump-starting procedure ( Y
page 249).248
Battery (vehicle)
Breakdown assistance

Jump-starting For the jump-starting procedure, use only the jump-starting connection point in the engine com-
partment ,c onsisting of ap ositive terminal and ag round point.
G WARNING
Battery acid is caustic. There is ar isk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
G WARNING
During charging and jump-starting, explosive gases can escape from the battery. There is ar isk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over ab attery.
G WARNING
During the charging process, ab attery produces hydrogen gas. If as hort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is ar isk of an explosion.R
Make sure that the positive terminal of ac onnected battery does not come into contact with
vehicle parts. R
Never place metal objects or tools on ab attery.R
It is important that you observe the described order of the battery terminals when connecting
and disconnecting ab attery.R
When jump-starting, make sure that the battery poles with identical polarity are connected. R
It is particularly important to observe the described order when connecting and disconnecting
the jumper cables. R
Never connect or disconnec tt he battery terminals while the engine is running.
G WARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is ar isk 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 could be
damaged by the non-combusted fuel.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the dis-
charged battery has frozen .Int his case, you may neither charge the battery nor jump-start the
vehicle. The service life of at hawed-out battery may be shorter. The starting characteristic sc an be
impaired, particularly at low temperatures. Have the thawed-out battery checked at aq ualified
specialist workshop. Jump-starting 249
Breakdown assistance Z

Before changin gaf useX
Switch off the engine. X
Switch off al le le ctrical consumers.X
Make sure tha tt he ignition is switched off
( Y
page 115).
or X
Whe nu si ng the SmartKey, turn the SmartKey
to position 0 in the ignition lock and remove it
( Y
page 115).X
Secure the vehicl ea gain st rolling away
( Y
page 131).
All indicator lamps in the instrument cluster
must be off.
The fuses are locate dinv arious fus eb ox es:R
Fus eb ox in the engine compartment on the
left-hand side of the vehicle, when viewe di n
the direction of travel R
Fus eb ox in the trunk
Fuse bo xint he engine compartment
i Observ et he "Important safety notes "s ec-
tio n( Y
page 253).
G WARNING
Whe nt he hoo diso pe na nd the windshield
wipers are set in motion, yo uc an be injured by
the wipe rl in kage. There is ar is kofi njury.
Alway ss wi tch off the windshield wipers and
the ignition before opening the hood.
X
Make sure tha tt he windshield wipers are
turne do ff.X
Ope nt he hood.X
Use ad ry cloth to remove any moisture from
the fus eb ox . X
To open: open clamps D .X
Remove fus eb ox cover C forwards.X
To close: check whethe rt he sea lisl yi ng cor-
rectl yinc over C .X
Insert cover C at the rea roft he fus eb ox into
the retainer. X
Fol dd ow nc over C and close clamps D .X
Close the hood.
Fuse bo xint he trunk
i Observ et he "Important safety notes "s ec-
tio n( Y
page 253).
The fus eb ox is locate dint he trunk behind the
partition covering. X
Ope nt he trunk lid. X
To open: release cover C on the right and
left-hand side sw it haf la to bj ect.X
Ope nc over C downward sint he direction of
the arrow.254
Fuses
Breakdo wn assis tance

The antifreeze/corrosion inhibitor concentra-
tion in the engine cooling system should: R
be at least 50%. This will protec tt he engine
cooling system against freezin gd own to
approximately -35 ‡( -37 †).R
not exceed 55% (antifreez ep rotection down
to -49 ‡[ -45 †]). Otherwise, heat will not be
dissipated as effectively.
If the vehicle has lost coolant, add equal
amounts of water and antifreeze/corrosion
inhibitor.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in accordance
with MB Specifications for Servic eP roducts
310.1.
i When the vehicle is first delivered, it is filled
with ac oolant mixture that ensures adequate
antifreeze and anti-corrosion protection.
i The coolant is checked with every mainte-
nanc ei nterval at aq ualified specialist work-
shop.
Fillin gc apacitiesMissing values were not availabl eatt ime of
going to print.
Model Capacity
SLC 300
Approx .8 .5 US qt
(8.0 l)
Mercedes ‑ Benz
SLC 43 AMG
Windshield washer system
Important safety notes
G WARNING
Windshield washer concentrate could ignite if
it comes into contact with hot engine compo-
nent sort he exhaust system. There is ar isk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
! Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or MB
WinterFit. Unsuitable washer fluid could dam-
age the plastic lenses of the headlamps. ! Only MB SummerFit and MB WinterFit
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
Do not use distilled or de-ionised water. Other-
wise, the level sensor may give af alse reading.
When handling washer fluid, observe the impor-
tant safety notes on service products
( Y
page 284).
At temperatures above freezing: X
Fill the washer fluid reservoir with am ixture of
water and windshield washer fluid, e.g. MB
SummerFit. X
Add 1p art MB SummerFit to 100 parts water.
At temperatures below freezing: X
Fill the washer fluid reservoir with am ixture of
water and washer fluid, e.g. MB WinterFit.
For the correc tm ixing ratio refer to the infor-
mation on the antifreeze reservoir.
i Add windshield washer fluid, e.g. MB Sum-
merFit or MB WinterFit, to the washer fluid all
year round.
Climate control system refrigerant
Important safety notes The climate control system of your vehicle is fil-
led with refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
! Only the refrigerant R ‑ 134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved for
R-134a refrigerant .O therwise, the climate
control system may be damaged.
Servic ew ork, such as refilling with refrigerant or
replacing component parts, may only be carried
out by aq ualified specialist workshop. All appli-
cable regulations, as well as SAE standard J639,
must be adhered to.
Always have work on the climate control system
carried out at aq ualified specialist workshop.288
Service products and filling capacities
Technical data