2018 MERCEDES-BENZ SL CLASS engine overheat

In addition to driving style, the actual consump-
tion is affected by other factors, such as: R
load R
tire pressure R
cold start R
choice of route R
active electrical consumers
These factors are not include dint he ECO dis-
play.
An economical driving style specially requires
driving at moderate engine speeds.
Achieving ah igher valu eint he categories
"Acceleration" and "Constant": R
observe the gearshift recommendations. R
drive the vehicle in drive program C or E .
In urba nt raffic and stop-start traffic, drive pro-
gram C is recommended.
On long journeys at ac onstant 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 area satt he start of aj ourney. On lon-
ger journeys, there are fewer changes. For more
marked changes, perform am anua lr est
( Y
page 167).
Further information on the ECO display
( Y
page 166).
Braking
Important safety notes
G WARNING
If you shift down on as lippery road surface in
an attempt to increase the engine's braking
effect, the drive wheel sc ould lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on as lippery road surface.
Downhill gradients
! On long, steep gradients, you must reduce
the load on the brakes. To use engine braking,
shift to al owe rg 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 ad rive 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 al owe rg 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 Pilo tD ISTRONIC.
Heavy and light loads
G WARNING
If you rest you rf oot on the brake peda lw 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 peda lasaf ootrest. Never
depres st he brake peda la nd the accelerator
peda latt he same time.
! Depressing the brake peda lc onstantly
results in excessive and premature wea rt o
the brake pads.
If the brakes have been subjected to ah eavy
load ,don ot stop the vehicle immediately ,b ut
drive on for as hort while. This allows the airflow
to cool the brakes more quickly.
Wet roads If you have driven for al ong time in heavy rain
withou tb raking, there may be ad elayed 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 depres st he brake peda lm ore
firmly .M aintai nag reater distance from the
vehicle in front.
After driving on aw et road or having the vehicle
washed, brake firmly whil ep aying attention to
the traffic conditions. This wil lw arm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.136
Driving tips
Driving and parking

Coolan tt emperatur eg auge
G WARNING
Opening th eh ood when th ee ng in eiso ver-
heated or when there is af ir eint he engine
compartmen tc oul de xp ose you to hot gases
or other servic ep roducts. Ther eisar is ko f
injury.
Let an overheate de ng in ec oo ld own before
opening th eh ood .Ift he re is af ir eint he
engin ec ompartment, keep th eh ood closed
and contac tt he fir ed epartment.
! Ad isplay message is shown if th ec oolant
temperatur eist oo high.
If th ec oolant temperatur eiso ve r2 48 ‡
(12 0† ), do no tc ontinue driving .T he engine
will otherwise be damaged.
The coolant temperatur eg age is in th ei nstru-
men tc luste ront he right-han ds ide ( Y
page 32).
The H markin gint he coolant temperatur eg auge
corresponds to ac oolant temperatur eo f
approximately 24 8‡ (12 0† ).
Under normal operatin gc ondition sa nd at the
correc tc oolant level, th ec oolant temperature
gauge may ris etot he H marking. Operatin gt he on-boar dc omputer
Overview
C
Multifunction display D
Right control panel

Display messages
Possible causes/consequences and P Solutions
Onl yS elect Par k
(P) Whe n Vehicl e is
Stationar y The vehicl eism oving .X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions.X
Shift th et ra nsmission to position ] .
Apply Brake to
Select R You hav ea ttempte dtos hift from position [ to position ^ .X
Depress th eb rak ep edal .X
Shift th et ra nsmission to position ^ .
Servic e Required Do
Not Shift Gears
Visit Dealer You canno tc ha ng et he transmission position due to am alfunction .
Aw arning tone also sounds.
If transmission position [ is selected:X
Drive to aq ualified specialist workshop without shifting th et ra ns -
mission from position [ .
If position ^ , \\ or ] is selected:X
Notify aq ualified specialist workshop or breakdown service.
Reversing Not Possi‐
ble Servic e Required You can no longer shift to transmission position ^ due to am alfunc -
tion .
Transmission position s ] , \\ or [ continu etobea vailable.
Aw arning tone also sounds. X
Visit aq ualified specialist workshop .
Transmission Mal ‐
function Sto p Am alfunction has occurred in th em echanical transmission compo -
nents.
Aw arning tone also sounds. The transmission shift sa utomatically to
position \\ . X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions.X
Shift th et ra nsmission to position ] .X
Secur et he vehicl ea gainst rollin ga way ( Y
page 131).X
Notify aq ualified specialist workshop or breakdown service.
Sto pV ehicl eL eave
Engine Runnin g Wai t
Transmission Cool‐
ing The transmission has overheated. Pullin ga way can be temporarily
impaire dorn ot possible.X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions. Do no tc ontinue drivin g
under any circumstances. X
Wait until th ed isplay message disappear sb efore pullin ga way.
Auxiliary Batter y
Malfunction The auxiliary battery for th ea utomatic transmission is no longer bein g
charged. X
Visit aq ualified specialist workshop at th en ex to pportunity.X
Unti lt hen, always shift th et ra nsmission to position ] before you
switch off th ee ng ine.X
Befor el eaving th ev ehicle, apply th ee lectric parking brake.Display messages 19 9
On-boar dc omputer an dd isplays Z

Engine compartment
Hood
Important safety notes
G WARNING
If th eh ood is unlatched, it may open up when
th ev ehicle is in motion and bloc ky our view.
Ther eisar isk of an accident.
Never unlatch th eh ood while driving .B efore
ever yt ri p, ensure that th eh ood is locked.
G WARNING
When opening and closin gt he hood ,itm ay
suddenly fall int ot he closed position .T her ei s
ar isk of injury to person sw ithin range of
movemen toft he hood.
Open and close th eh ood only when no on ei s
within its range of movement.
G WARNING
Opening th eh ood when th ee ngine is over-
heated or when there is af ir eint he engine
compartmen tc oul de xpose you to hot gases
or other servic ep roducts. Ther eisar isk of
injury.
Let an overheate de ngine coo ld own before
opening th eh ood .Ift he re is af ir eint he
engine compartment, keep th eh ood closed
and contac tt he fir ed epartment.
G WARNING
The engine compartmen tc ontain sm oving
components. Certain components, suc ha s
th er adiator fan ,m ay continue to run or start
again suddenly when th ei gnition is off .T here
is ar isk of injury.
If you nee dtodoa ny work inside th ee ngine
compartment: R
switch off th ei gnitionR
never reac hi nt ot he area wher et he re is a
risk of danger from moving components,
suc hast he fan rotatio na rea R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
Opening th eh ood
G WARNING
Certain component sint he engine compart-
ment, suc hast he engine ,r adiator and parts
of th ee xhaust system, can become ver yh ot.
Workin gint he engine compartmen tp ose sa
risk of injury.
Wher ep ossible, let th ee ngine coo ld own and
touch only th ec omponent sd escribe dint he
following.
G WARNING
When th eh ood is open and th ew indshield
wiper sa re set in motion ,y ou can be injured by
th ew iper linkage. Ther eisar isk of injury.
Always switch off th ew indshield wiper sa nd
th ei gnition before opening th eh ood.
! Mak es ure that th ew indshield wiper sa re
no tf olded away from th ew indshield. You
coul do th erwise damag et he windshield wip-
ers or th eh ood.
X
Mak es ure that th ew indshield wiper sa re
turned off. X
Pull release lever C on th eh ood.
The hood is released.Engine compartment 233
Maintenance and care Z

Model MB-Freigabe or
MB-Approval
All models
229.5
i MB approval is indicated on the oil contain-
ers.
Fillin gc apacitiesThe following values refer to an oil change
including the oil filter.
Model Capacity
SLC 300
6.7 US qt (6.3 l)
Mercedes-AMG
SLC 43 6.9 US qt (6.5 l)
Ad ditives
! Do not us ea ny additive sint he engine oil.
Thi sc ould damag et he engine.
Brake fluid
G WARNING
The brake fluid constantly absorb sm oisture
from the air. Thi sl owers the boiling point of
the brake fluid .Ift he boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. Thi sw ould impai rb raking efficiency.
There is ar is kofana ccident.
Yo us houl dh av et he brake fluid renewe da t
the specified intervals.
Whe nh an dling brake fluid ,o bserve the impor-
tant safety notes on service products
( Y
page 290).
The brake fluid change interval sc an be found in
the Maintenance Booklet.
Only us eb rake fluid approved by Mercedes-
Benz in accordance with MB-Freigab eorM B-
Approva l3 31.0.
Information abou ta pp roved brake fluid can be
obtaine data ny qualified specialist worksho po r
on the Interne ta t
http://bevo.mercedes-benz.co m. i Have the brake fluid regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Coolant
Importan ts afety notes
G WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is ar isk of fire and injury.
Let the engine cool dow nb efore yo ua dd anti-
freeze .M ake sur et hat antifreeze is not spilled
next to the filler neck. Thoroughly clea nt he
antifreeze from components before starting
the engine.
! Only ad dc oolant that has bee np remixed
with the desire da ntifreeze protection. You
coul do therwise damag et he engine.
Furthe ri nformatio nonc oolants 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 aq ualifie ds pecialist workshop.
! Always use as uitabl ec oolant mixture, even
in countries where hig ht emperatures prevail.
Otherwise ,t he engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have 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 nh andling coolant
( Y
page 290).
The coolant is am ixture of water and anti-
freeze/corrosion inhibitor. It is responsible for
the following: R
anti-corrosion protection R
antifreeze protection R
raising the boiling point
If the coolant has antifreeze protection dow nt o
-35 ‡( -3 7† ), the boiling point of the coolant
during operation is approximatel y2 66 ‡
(130 †).Service products and filling capacities 293
Technical data Z