2019 MERCEDES-BENZ S-CLASS CABRIOLET Owner's Manual

Ac
tivating/deactivating volume adjustment
in the Bu rmester ®
high-end Sur round sound
sy stem
Multimedia sy stem:
, Media .
00BB Sound .
Automatic Vol-
ume Adjustment
Au tomatic volume adjustment compensates for
dif fering volumes when changing between audio
sources. #
Activate 0073or deacti vate 0053 the function.
Ad justing the balance/ fader in the
Burmes ter®
high-end Sur round sound sys‐
tem
Multimedia sy stem:
, Media .
00BB Sound .
Balance and
Fader #
Adjust the balance and fader. #
Toexitth e menu: pressthe0038 button. Ad
justing the seat-based sound optimization
in the Burmes ter®
high-end Sur round sound
sy stem
Multimedia sy stem:
, Media .
00BB Sound .
VIP Seat
This setting optimizes the sound playback forthe
selected seat position. #
Activate the function 0073. #
Select a seat position.
Selecting the sound profile in the
Bu rm ester ®
high-end Sur round sound sys‐
tem
Multimedia sy stem:
, Media .
00BB Sound .
Sound Profiles
The following profiles are available:
R Pure
R Easy Listening
R Live
R Surround #
Select a sound profile. Multimedia sy
stem 335

ASS
YST PLUS se rvice inter val display Fu
nction of the ASS YST PLUS se rvice inter val
displ ay The ASS
YST PLUS service inter val display on the
Instrument Display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hide this service message using the
back button on the left-hand side of thesteering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may
shor tenth e service inter val, e.g. in thefo llowing
cases:
R Mainly short-dis tance driving
R When the engine is of ten le ftidling for long
periods
R Intheeve nt of frequent cold start phases
Mercedes-Benz recommends avoiding such
operating conditions.
Yo u can obtain fur ther information concerning
th e servicing of your vehicle from a qualified specialist
workshop, e.g. an authorized
Mercedes-Benz Center. Displaying
the service due da te On-board computer:
, Service .
ASSYST PLUS
The next service due date is displa yed. #
Toexitth e displa y:press the back button
on the left-hand side of thesteering wheel.
Make sure toobser vethefo llowing fur ther rela‐
te d subjec t:
R Operating the on-board computer
(→ page 211). Information on
regular main tenance work *
NO
TEPremature wearthro ugh failure to
obser veservice due dates Service
workwhich is not car ried out at the
ri ght time or incomple tely can lead to
inc reased wear and damage totheve hicle. #
Alw ays obser vethe prescribed service
inter vals. #
Alw ays ha vethe prescribed service
wo rkcar ried out at a qualified specialist
wo rkshop. Special service
requ irements The prescribed service inter
val is based on nor‐
mal operation of theve hicle. Maintenance work
will need tobe per form ed more of ten if theve hi‐
cle is operated under arduous conditions or
increased loads.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsi‐
bility as rega rdsto whe ther maintenance work
needs tobe per form ed more of tenth an speci‐
fi ed based on the actual operating conditions
and/or loads.
Examples of arduous operating conditions:
R regular city driving with frequent intermedi‐
ate stops
R mainly short-dis tance driving 336
Maintenance and care

R
frequent operation in mountainous terrain or
on poor road sur faces
R when the engine is of ten le ftidling for long
periods
R operation in particula rly dusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, ha vethe
interior air filter, engine air cleaner, engine oil
and oil filter etc. changed more frequent ly. The
tires must be checked more frequently if the
ve hicle is operated under increased loads. Fur‐
th er information can be obtained at a qualified
specialist workshop. Battery disconnection periods
The ASS
YST PLUS se rvice inter val display
can only calculate the service due da tewhen
th e bat tery is connected. #
Notedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (→ page 336). Engine compartment
Ac
tive hood (pedestrian pr otection) Operation of
the active hood (pedestrian pro‐
te ction)
In cer tain accident situations, therisk of injury
to pedestrians can be reduced bythe actuation
of the active hood. The rear area of the hood is
ra ised byappr oximately 80 mm.
Fo rth e drive tothewo rkshop, reset the trig‐
ge red active hood yourself. Af terth e active hood
has been triggered, pedestrian pr otection may
be limited.
A qu alified specialist workshop must re-ins tate
th e full functionality of the active hood.
The active hood is not available in all countries.
Re setting the active hood &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. #
With your hand flat, push down active hood
1 inthe area around the hinges on bo th
sides (ar rows).
The hood must engage in position. #
Ifth e active hood can be raised slightly at
th ere ar in the area of the hinges, repeat the
st ep until it engages cor rectl y. Maintenance and care
337

Opening/closing
the hood &
WARNING Risk of accident if the engine
hood is unlatched while driving
An unloc ked engine hood may open up when
th eve hicle is in motion and block your vie w. #
Never unlatch the engine hood while
driving. #
Before every trip, ensure that the
engine hood is latched. &
WARNING Risk of accident and inju ry
when opening and closing the engine
hood
When opening or closing the engine hood, it
may suddenly drop into the end position.
There is a risk of injury for an yone in the
engine hood's range of mo vement. #
Only open or close the engine hood
when there are no persons in the
engine hood's range of mo vement. &
WARNING Danger of bu rns 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
with 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 inju rydue tomoving
parts
Cer tain components in the engine compart‐
ment may continue tomo veor suddenly
mo veagain even af terth e ignition has been
switched off, e.g. the cooler fan.
Ma kesure of thefo llowing before per form ing
ta sks in the engine compartmen t: #
Switch the ignition off. #
Neverto uch the danger zone sur round‐
ing moving co mponent parts, e.g. the
ro tation area of thefa n. #
Remo vejewe lry and watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of inju ryfrom touching
co mp onent parts under voltage
The ignition sy stem and the fuel injection
sy stem workunder high voltage. If youto uch
co mp onent parts which are under voltage,
yo u could recei vean electric shoc k. #
Neverto uch co mponent parts of the
ignition sy stem or the fuel injection sys‐
te m when the ignition is switched on. &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. 338
Maintenance and care

#
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. &
WARNING Risk of inju ryfrom using the
windshield wipers while the engine hood
is open
When the engine hood is open and the wind‐
shield wipers are set in motion, you can be
trapped bythe wiper linkage. #
Alw ays switch off the windshield wipers
and ignition before opening the engine
hood. #
Toopen: pull lever1 torelease the hood. #
Push handle 1ofthe hood catch upwards
and lift the hood byappr oximately 15in
(40 cm). #
Toclose: lowe rth e hood and let it fall from a
height of appr oximately 8 in (20 cm). #
Ifth e hood can still be lif ted slightl y,open
th e hood again and close it with a little more
fo rc e until it engages cor rectl y. Maintenance and care
339

Engine oil
Checking
the engine oil le vel with an on-
board computer
Re quirements:
The engine oil le vel is de term ined during driving.
De term ining the engine oil le vel can take up to
30 minutes with a normal driving style and even
longer with an active driving style.
In order torecei veare sult as quickly as possi‐
ble:
R Warm upthe engine.
R Park theve hicle on a le vel sur face.
R Lea vethe engine running at idle speed.
On-board compu ter:
, 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
of the 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": add
1. 1 US qt (1 liter) 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 inse rted. Consult a qualified
specialist workshop. #
Engine Oil Level System Currently Unavail.:
close the hood. Ad
ding engine oil &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. &
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. 340
Maintenance and care

*
NO
TEEngine dama gecaused byan
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 forthe
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Follow the instructions in the service
inter val display rega rding the oil
ch ange. *
NO
TEDama gecaused byadding too
much engine oil To
o much engine oil can damage the engine
or the catalytic con verter. #
Have excess engine oil remo ved at a
qu alified specialist workshop. #
Turn cap 1counter-clockwise and remo ve
it. #
Add engine oil. #
Replace cap 1and turn it clockwise as far
as it will go. #
Check the oil le vel again . Checking coolant le
vel &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. &
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, wear pr otective
gl ove s and saf etygl asses. #
Open the cap slowly torelease pres‐
sure. Maintenance and care
341

#
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). #
If necessa ry,re mo vethe co ver. #
Slowly turn cap 1counter-clockwise to
re lie ve ove rpressure. #
Continue turning cap 1counter-clockwise
and remo veit.
The coolant le vel is cor rect:
R Ifth e engine is cold, up tomar ker bar 2.
R Ifth e engine is warm, up to0.6 in (1.5 cm)
ov er mar ker bar 2. #
If necessar y,add coolant that has been
appr ovedby Mercedes-Benz.
R Further information on coolant:
(→ page 414) Ad
ding washer fluid tothe windshield
wa sher sy stem &
WARNING Risk of bu rns 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 bu rns 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
with 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. 342
Maintenance and care