engine coolant MERCEDES-BENZ S-CLASS CABRIOLET 2018 Owner's Manual

1Speedom eter →
208
2 AIR BODY CONTROL malfunctioning →
454
3 #! Turn signal light →
109
4 Multifunction display →
211
5 Tach ome ter →
208
6 å ESP
®OFF →
447
÷ ESP
®→
447
7 K High beam →
109
L Low beam →
108
T Parking lights →
108
8 ? Coolant too hot/cold →
456
9 Coolant temp erature gauge →
208
A · Distance warning →
454
B Ð Steering assis tance malfunction →
455
C # Electrical malfunction →
456
D Brakes (red) →
447
$ USA only
J Canada only
E ü Seat belt is not fastened →
454
F Fuel le vel display
G 8 Fuelreser vewith fuel filler flap location
indicator →
456,
456
H R Rear fog light →
109
I 6 Restra int sy stem →
34
J % Indicator lamp has no function
K ; Check Engine →
456
L Elect ric park ing brake applied (red) →
447
F USA only
! Canada only
M h Tire pressure monitoring sy stem →
460
N ! ABS malfunction →
447
O ! Electric pa rking brake (yellow) →
447
At aglance – Warning and indicator lamps 11

Instrument Displayoverview
&
WARNING Risk of accident due toan
instrument display malfunction
If th e Instrument Display has failed or mal‐
functioned, you may not recognize function
re strictions applying tosaf etyre leva nt sys‐
te ms.
The operating saf etyof your vehicle may be
impaired.
#Drive on carefull y.
#Have theve hicle checked immediately
at a qualified specialist workshop.
Mercedes‑AMG vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognize dangers.
If th e operating saf etyof your vehicle is
impaired, park theve hicle safely as soon as pos‐
sible. Contact a qualified specialist workshop. Instrument display
1Speedome
ter
2Multifunction display
3Ta ch ome ter
4Coolant temp erature gage
5Fu el le vel and fuel filler flap location indica‐
to r
% This display is an example. Inst ead oftach ‐
ome ter3 other displa ysare also possible.
The segments in speedome ter1 indica tethe
sy stem status forth efo llowing:
RCruise control (→page 159) (→page 160)
RAc tive Dis tance Assist DISTRONIC
(→pa ge 162)
Ve hicles with Traf fic Sign Assis t:De tected
instructions and traf fic signs appear in the
speedome ter (
→page 197).
* NO
TEEngine damage duetoexc essively
high engine speeds
The engine will be damaged if you drive with
th e engine in theov errevving range.
#Do not drive wi th the engine in theove r‐
re vving range.
In tach ome ter3 theove rrev ving range is
shown in red. When theove rrev ving range is
re ached, the fuel supply is inter rupted toprotect
th e engine.
During normal operating conditions, coolant
te mp erature display 4may rise to248 °F
(120 °C).
208 Instrument Display and on-board computer

*NO
TEEngine damage causedbyan
incor rect oil filter, incor rect oil or addi‐
tives
#Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forth e
service inter vals.
#Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an prescri bed.
#Do not use additives.
#Follow the instructions in the service
inter val display rega rding the oil
ch ange.
* NO
TEDama gecaused bytopping up too
much engine oil
Ad ding too much engine oil can cause dam‐
age tothe engine or the catalytic con verter.
#Ha ve excess engine oil remo ved at a
qu alified specialist workshop.
#Tu rn cap 1counter-clockwise and remo ve
it.
#Ad d engine oil.
#Replace cap 1and turn it clockwise as far
as it will go.
#Check the oil le vel again (→page 331).
Checking coolant le vel
&
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem.
#Let the engine cool down and only
to uch the component parts described
as follo ws .
&
WARNING Risk of scalding from hot
coolant
The engine cooling sy stem is pressurized,
particularly when the engine is warm. If you
open the cap, you could be scalded byhot
coolant spr aying out.
#Let the engine cool down before open‐
ing the cap.
#When opening the cap, wearglove s and
saf etygl asses.
#Open the cap slowly torelease pres‐
sure.
332 Maintenance and care

#Park theve hicle on a le vel sur face.
#Check the coolant temp erature display in the
instrument clus ter.
The coolant temp erature must be below
15 8 °F (70 °C).
#Slowly turn cap 1counter-clockwise to
re lease overpressure.
#Continue turning cap 1counter-clockwise
and remo veit.
The coolant le vel is cor rect:
Rifth e engine is cold, up tomar ker bar 2
Rifth e engine is warm, up to0.6 in (1.5 cm)
ov er mar ker bar 2
#If necessar y,top up with coolant that has
been appr ovedby Mercedes-Benz.
RFurther information on coolant (→page 400)
Ad ding washer fluid tothe windshield
wa sher sy stem
&
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem.
#Let the engine cool down and only
to uch the component parts described
as follo ws .
&
WARNING Danger of burn s when open‐
ing the hood
If yo u open the hood when the engine has
ove rheated or during a fire inthe engine
compartment, you could come into contact
wit h hot gases or other escaping operating
fl uids.
#Before opening the hood, allow the
engine tocool down.
#Intheeve nt of a fire inthe engine com‐
partment, keep the hood closed and
call thefire service.
&
WARNING ‑ Risk of fire and injury from
windshield washer concentrate
Wi ndshield washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact wi thhot engine component parts or
th eex haust sy stem.
#Make sure that no windshield washer
concentrate spills out next tothefiller
opening.
Maintenance and care 333

Coolant
Notes on coolant
Obser vethe no tes on operating fluids
(
→page 396).
& WARNING ‑ Risk of fire and injury from
antifreeze
If antifreeze comes into con tact wi thhot
component parts in the engine compart‐
ment, it may ignite.
#Allow the engine tocool down before
adding antifreeze.
#Make surethat no antifreeze spills out
next tothefiller opening.
#Thoroughly clean off any antifreeze
from component parts before starting
th eve hicle.
* NO
TEDama gecaused byincor rect cool‐
ant
#Only add coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction.
Fu rther information on coolant:
RIn the Mercedes-Benz Specifications for
Operating Fluids 310.1, e.g. online at
http://be vo.mercedes-benz.com.
RAt aqu alified specialist workshop.
* NO
TEOverheating at high outside tem‐
peratures
If an inappro priate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐
te cted against overheating and cor rosion at
high outside temp eratures.
#Alw ays use coolant appr ovedby
Mercedes-Benz.
#Obser vethe instructions in the
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1.
Ha ve the coolant regularly changed at a qualified
specialist workshop.
The proportion of cor rosion inhibitor/antifreeze
concentrate in the engine cooling sy stem should
be:
Ra minimum of 50% (antifreeze pr otection
down toappr oximately -35 °F (-37 °C)).
Ra maximum of 55% (antifreeze pr otection
down to-49 °F (-45 °C)).
Coolant capacity
Mode lC apacity
S 560 4MATIC 15.0 US qt (14.2 l)
Note s on windshield washer fluid
Obser vethe no tes on operating fluids
(→page 396).
400 Tech nical da ta

Engine
Display messagesPossible causes/consequences and MSolutions
Check Coolant Level See
Operator's Manual *T
he coolant le vel is too lo w.
* NO
TEEngine damage duetoinsuf ficient coolant
#Av oid long journe yswith insuf ficient coolant.
#Ad d coolant .
?
Coolant Too Hot Stop Vehi-
cle Turn Engine Off *T
he coolant is too hot.
#Pull over and stop theve hicle safely and switch off the engine, paying attention toroad and traf fic conditions.
&
WARNING Danger of burn s when opening the hood
If yo u open the hood when the engine has overheated or during a fire inthe engine compartment, you could
come into contact with hot gases or other escaping operating fluids.
#Before opening the hood, allow the engine tocool down.
#Intheeve nt of a fire inthe engine compartment, keep the hood closed and call thefire service.
#Wa it until the engine has cooled down.
#Make sure that the air supply tothera diator is not obstructed.
#Av oiding high loads on the engine, drive on tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 248 °F (120 °C).
Display message s andwarning/indicator lamps 427

Displaymessages
Possible causes/consequences and MSolutions
?
*Thefan mo tor is defective.
#Av oiding high loads on the engine, drive on tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 248 °F (120 °C).
#
Stop Vehicle See Opera-
tor's Manual *T
he battery is no longer being charge d and the battery charge leve l is too lo w.
* NO
TEPossible engine damage if you continue dr iving#Do not continue dr iving under any circum stances.
#Consult a qualified specialist workshop.
#Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances.
#Switch off the engine.
#Consult a qualified specialist workshop.
#
Start Engine See Opera-
tor's Manual *T
he engine is off and the battery charge leve l is too lo w.
#Switch off electrical consumers that are not required.
#Leavethe engine running for a few minutes, or drive for a longer dis tance.
The battery charge s.
428
Display messages and warning/indicator lamps

Instrument Display intheWi descreen Co ck‐
pit
Prog ressive setting (Widescreen Cockpit)
Ifyo u select the progressive display setting in
ve hicles with a Widescreen Cockpit, the position
of the indicator lamps in the Instrument Display
ch anges.
Wa rning and indicator lamps:
L Low beam (
→page
108)
T Pa
rking lights (
→page 108)
K High beam
(
→page10 9)
#! Tu
rn signal light (
→page 109)
R Re
ar fog light (
→page 108)
ü Seat belt is not
fastened
(
→page 454)
$ USA: brakes (red) (
→page
447)
J Canada
: brakes (red) (
→page 447)
! ABS malfunction (
→page
447)
÷ ESP
®(→page 447)
å ESP
®OFF (→page 447)
F US
A: electric pa rking brake applied
(red) (
→page 447) !
Canada: electric parking brake
applied (red) (
→page
447)
! Electric pa
rking brake (yellow)
(
→page 447)
Ð St
eering assis tance malfunction
(
→pa ge 455)
# Electrical
fault (
→page 456)
6 Re
stra int sy stem (
→page 447)
; Che
ckEngine (
→page 456)
8 Fu
elreser vewith fuel filler cap loca‐
tion indicator (
→page 456)
(→page 456)
? Coolant
too hot/cold (
→page 456)
· Dis
tance warning (
→page 454)
h Ti
re pressure monitoring sy stem
(
→page 460)
44 6
Displ aymessage s andwarning/indicator lamps

Warning/indicator lamp
Possible causes/consequences and MSolutions
?
Coolantwarning lamp The
red coolant warning lamp is lit while the engine is running.
Po ssible causes are:RThe temp erature sensor is malfunctioning
RCoolant le velto o low
RThe air supply tothera diator is obstructed
RThe radiator fan is de fective
If th ere is an additional warning tone, the coolant temp erature has exceeded the maximum permissible temp erature.
&
WARNING Danger of burn s when opening the hood
If yo u open the hood when the engine has overheated or during a fire inthe engine compartment, you could come
into contact with hot gases or other escaping operating fluids.
#Before opening the hood, allow the engine tocool down.
#Intheeve nt of a fire inthe engine compartment, keep the hood closed and call thefire service.
#Pull over and stop theve hicle safely and switch off the engine, paying attention toroad and traf fic conditions. Do
not continue driving under any circums tances.
#Obser vethe messages in the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale:
#Consult a qualified specialist workshop.
458
Display messages and warning/indicator lamps

Warning/indicator lamp
Possible causes/consequences and MSolutions
Otherwise:
#Lea vetheve hicle and keep a safe dis tance from theve hicle until the engine has cooled down.
#Check the coolant le vel.
#Make sure that the air supply tothera diator is not obstructed.
#Av oiding high loads on the engine, drive on tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below there d area.
Display messages and warning/indicator lamps 459