2018 MERCEDES-BENZ S-CLASS COUPE Owner's Manual

Engine oil
Checkingthe engine oil le vel with an on-
board computer
The engine oil le vel is de term ined during driving.
The oil le vel display is only available af ter a driv‐
ing time of up to30 minutes and if the ignition is
switched on, depending on the driving profile.
It is not possible tocor rectly measure the oil
le ve l if:
Rtheve hicle is not le vel during the measure‐
ment process.
Rth e hood was pr eviously opened.
The engine must be restar ted and the engine oil
le ve l will be de term ined again when driving.
On-board computer:
,Service.Engine Oil Level
Yo u will see one of thefo llowing messa ges in
th e multifunction displa y:
#Measuring Engine Oil Level...: measurement
ofthe oil le vel is not yet possible. Repeat the
requ est af ter a maximum of 30 minutes' driv‐
ing.
#Engine Oil Level OK andthe bar display for
indicating the oil le vel in the multifunction
display is green and is between "min" and
"max": the oil le vel is cor rect.
#Engine Oil Level Add 1.0 l andthe bar display
fo r indicating the oil le vel in the multifunction
display is orange and is below "min": top up
with 1.1 US qt (1 l) of engine oil.
#Reduce Engine Oil Level andthe bar display
fo r indicating the oil le vel in the multifunction
display is orange and is abo ve"max ":drain
off theex cess engine oil. Consult a qualified
specialist workshop.
#For Engine Oil Level Switch Ignition On:
switch on the ignition tocheck the engine oil
le ve l.
#Engine Oil Level System Inoperative: sensor
defective or not connec ted. Consult a quali‐
fi ed specialist workshop.
#Engine Oil Level System Currently Unavail.:
close the hood. Ad
ding engine oil
&
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 offire and injury from
engine oil
If engine oil comes into con tact wi thhot
component parts in the engine compart‐
ment, it may ignite.
#Make sure that no engine oil is spilled
next tothefiller opening.
#Allow the engine tocool off and thor‐
oughly clean the engine oil from compo‐
nent parts before starting theve hicle.
Maintenance and care 327

*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 327).
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.
328 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 399)
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 329

#Remo vecap 1bytheta b, place on the edge
of thefiller opening and engage in place.
#Ad dwa sher fluid.
Cleaning and care
Inf ormation onwashing theve hicle in a car
wa sh
&
WARNING Risk of accident due to
re duced braking ef fect af terwa shing the
ve hicle
The braking ef fect is reduced af terwa shing
th eve hicle.
#Afterth eve hicle has been washed,
brake carefully while paying attention to
th e traf fic conditions until the braking
ef fect has been ful lyrestored.
To avo id damage to yourvehicle when using a
car wash, ensure thefo llowing beforehand:
Rto avoid possible water ingress in theve hicle,
it is preferable touse car washes which allow
th e high-pressure pre-cleaning tobe deacti‐
va ted (specification forth e con vertible pro‐
gram).
Rit is imperative toavo id a subsequent hot-
wa x treatment.
Rremo vethe SmartK eyin order toensure that
th e wind deflector on the windshield retracts.
RAc tive Dis tance Assist DISTRONIC and the
HOLD function are deactivated.
Rth e 360° Camera or there ar view camera is
switch ed off.
Rthe side windo wsand soft top are closed
comple tely.
Rth e blo werfo rth eve ntilation/heating is
switched off.
Rth e windshield wiper switch is in position g.
Rin carwashes with a con veyo r sy stem: neu‐
tral iis engaged.
Rthe SmartK eyis at a dis tance of at least 10ft
(3 m) away from theve hicle, otherwise the
trunk lid could open unintentionally.
% Ifyo uwo uld like tolea vetheve hicle while it
is being washed, make sure the SmartK eyis
located in theve hicle. The jgear is other‐
wise automatically engaged.
330 Maintenance and care

%If, af terth e car wash, youre mo vethewa x
from the windshield and wiper rubbers, this
will pr event smearing and reduce wiper
noise.
Information on using a high-pre ssure cleaner
&
WARNING Risk of accident when using
high-pressure cleaning equipment wi th
ro und-s pray nozzles
The wate r jet from a round-s pray nozzle (dirt
grinder) may cause damage totires and sus‐
pension components that is not visible.
Components damaged in this wa yma yfa il
unexpec tedly.
#Do not use high-pressure cleaning
equipment wi thround-s pray nozzles to
clean your vehicle.
#Damaged tires or suspension compo‐
nents must be replaced immediatel y.
Toavo id damage to yourvehicle, obser vethefo l‐
lowing when using a high-pressure cleaner:
RKe ep the SmartK eyat least 10ft(3 m) away
from theve hicle. Otherwise the trunk lid
could open unintentionall y.
RMaintain a distance of at least 11.8 in
(30 cm) totheve hicle.
RVe hicles with deco rative foil: parts of your
ve hicle are co vered with a decorative foil.
Maintain a dis tance of at least 27.6 in
(70 cm) between thefo il-c ove red parts of the
ve hicle and the nozzle of the high pressure
cleaner. Mo vethe high-pressure cleaner noz‐
zle around whilst cleaning.
RObser vethe information on the cor rect dis‐
ta nce in the equipment manufacturer's oper‐
ating instructions.
RDo not point the nozzle of the high-pressure
cleaner directly at sensitive parts such as
tires, the soft top, the wind deflector net, slits, electrical component parts, batteries,
light sources and
ventilation slot s.
Washing theve hicle byhand
Obser vethe legal requirements, e.g. in a number
of countries, washing byhand is only permitted
in specially designated wash ba ys.
#Use a mild cleaning agent, e.g. car shampoo.
#Wa shtheve hicle with luk ewarmwate r using
a soft car sponge. When doing so, do not
ex pose theve hicle todirect sunlight.
#Carefully hose theve hicle off with water and
dry using a chamois. Take care not topoint
th ewate r jet directly towa rdsth e air inlet
grille.
Maintenance and care 331

Notes on paintwo rk/matt finish paintwork care
Observethefo llowing information:
Cleaning and car eA voiding paintwork damage
Pa intwork
RInsect remains: soak with insect remo ver and rinse off the
trea ted areas af terw ards.
RBird droppings: soak with water and rinse off af terw ards.
RCoolant, brake fluid, tree resins, oils, fuel and greases:
re mo veby gently rubbing with a clo thsoaked in petroleum
et her or lighter fluid.
RTa rst ains: use tarre mo ver.
RWa x: use silicone remo ver.
RDo not attach sticke rs,fi lms or similar.
RRe mo vedirt immediatel y,where possible.
Matt finish
ROnly use care products appr oved byMercedes-Benz.RDo not polish theve hicle and light-alloy wheels.
ROnly use car washes that cor respond tothe latest engi‐
neering standards.
RDo not use car wash programs with a final hot wax treat‐
ment.
RDo not use paint cleane rs, buf fing or polishing products,
gl oss preser vers, e.g. wax.
RAlw ays ha vepaintwork repairs car ried out at a qualified
specialist workshop.
332
Maintenance and care

Cleaning NightView Assist
Camera behind the windshield
* NO
TEDama getothe camera lens when
cleaning
If yo u clean the camera lens yourself or spray
gl ass cleaner on the camera lens, you could
damage the camera lens.
#When cleaning thefield of vision of the
driving sy stems, do not spr ayglass
cleaner on the camera lens.
#Ifth e camera lens is dirty, please con‐
ta ct a qualified specialist workshop.
#Fo ld down the camera co verby handle
re cess 1.
#Use a clo thtoclean the windshield in front of
th e camera. Camera in
thera diator grillCamera lens 2is cleaned at regular inter vals
by operating the windshield washer sy stem.
#Use clear water and a soft clo thtoclean
came ralens 2when it is very dirty.
Maintenance and care 333

Notes on cleaning and care of the soft top
Obser vethefo llowing information:
Note s on cleaning and car eA voiding soft- top damage
Light soiling
RClean the soft top when dr y.
RRinsewit hclean water.
RNever use gasoline, thinners, tarre mo ver or stain remo ver
or other or ganic sol vents.
RRe mo vebird droppings immediatel y,as they are cor rosive
and can therefore cause the soft- topfabric toleak.
RNe ver use a high-pre ssure cleaner.
RDo not use sharp-edged equipment toremo veice and
sno w.
Norm
alto heavy
soiling
RClean the soft top with a brush and clean water.
RClean stains and other dirt with a brush and soft-top
cleaning agents recommended and appr ovedby
Mercedes-Benz.
RAlw ays brush from front toback in the direction of the
fa bric.
Fr equent cleaning reduces the soft top's resist‐
ance todirt. Torestore the ef fect, clean the soft
to p with the care products and cleaning agents
re commended and appr ovedby Mercedes-Benz.
Incor rect cleaning and care, as well as aging,
can cause the soft- top seams toleak. Ha vethe
soft-top seams sealed at a qualified specialist
wo rkshop, e.g. at your Mercedes-Benz service
cen ter. %
Place a suitable co verove rth e soft top if you
plan tolea vetheve hicle outside for a long
period of time.
Cleaning AI RCAP
Cleaning the wind deflector
Re quirements:
RThe soft top is closed.
RApply the electric parking brake manually.
RThe ignition is switched on.
RNe ver use a po werwa sher toclean the net of
th e wind deflector.
334
Maintenance and care