2018 MERCEDES-BENZ S-CLASS CABRIOLET check oil

ASSYST PLUS serv ice interval display
Fu nction of the ASS YST PLUS serv ice interval
displ ay
The ASS YST PLUS service inter val display in the
instrument display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hidethis service message using the
back button on the left-hand side of thesteering
wheel.
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.
#To exitth 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:
ROperating the on-board computer
(→page 209).
Car rying out maintenance workatregular
inter vals
* 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.
Examples of arduous operating conditions:
Rre gular city driving with frequent intermedi‐
ate stops
Rmainly short-dis tance driving
Rfrequent operation in mountainous terrain or
on poor road sur faces
Rwhen the engine is of ten le ftidling for long
periods
Roperation in particula rly dusty condition s
and/o rif air-recirculation mod eis frequentl y
used
In these or similar operating conditions, ha vethe
interior air filter, engine air cleaner, engine oil
and oil filter etc. changed more frequently. 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.
Maintenance and care 327

Engine oil
Checkingthe engine oil le vel with the on-
board compu ter
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 331

*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

Displaymessages
Possible causes/consequences and MSolutions
#
Stop Vehicle Leave Engine
Running*T
he battery charge leve l is too low and must be charge d.
#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.
#Lea veengine running.
#Wa it until the display message disappears before pulling away.
4
Check Engine Oil At Next
Refue ling *T
he engine oil le vel has dropped tothe minimum le vel.
* NO
TEEngine damage causedbydriving with insuf ficient engine oil#Av oid long journe yswith insuf ficient engine oil.
#Check the engine oil le vel when next refueling.
To p up the engine oil (
→page 331).
No tes on engine oil (
→page 398).
8
Gas Cap Loose *T
here has been pressure loss in the fuel sy stem. The fuel filler cap is not closed cor rectly or the fuel sy stem is
leaking.
#Close the fuel filler cap.
#If th e fuel filler cap was already proper lyclosed: consult a qualified specialist workshop.
Display messages and warning/indicator lamps 429

Active Steering Assist Cur rently
Un available See Operator's Manual .....4 25
Ac tive Steering Assist Inoperative .......4 26
Ad aptive Highbeam Assist Camera
Vi ew Restricted See Ope rator's Man‐
ual ....................................................... 445
Ad aptive Highbeam Assist Cur rently
Un available See Operator's Manual ....445
Ad aptive Highbeam Assist Inopera‐
tive ...................................................... 444
App lyBrake toShift from 'P' ............... 436
ÀAT TENTION ASSIST Inoperative ... 420
ÀAT TENTION ASSIS T:Take a
Break! .................................................. 420
bAu toLamp Function Inoperati ve
............................................................. 444
Au xilia ryBattery Malfunction .............. 438
Blind Spot Assist Currently Una vaila‐
ble See Opera tor's Manual .................. 423
Blind Spot Assist Inoperative ............... 423$
Check Brake Fluid Le vel.............. 414
Check Coolant Le vel See Operator's
Manual ................................................ 427
4Check Engine Oil AtNext Refu‐
eling .................................................... 429
hChe ckTire s ................................. 431
¥Check Washer Fluid .................... 443
?Coolant Too Hot Stop Vehicle
Tu rn Engine Off .................................... 427
Cruise Control Canceled ..................... 426
Cruise Contro
l Inoperati ve.................. 426
!Cur rently Una vailable See Oper‐
ator's Manual ...................................... 406
÷Cur rently Una vailable See Oper‐
ator's Manual ...................................... 408
ÂDon't Forget Your Key................ .435
Driver's Door Open & Transmission
No t in P Risk of Vehicle Rolling Away .. 436
bExample: Check Left Low Beam ............................................................. 443 _Example:
Front Left Seat Back‐
re st Not Loc ked .................................. 442
Fr ont Passenger Airbag Disabled See
Operator's Manual ...............................4 19
Fr ont Passenger Airbag Enabled See
Operator's Manual ...............................4 18
8Fu el Level Low ............................ 430
8Gas Cap Loose ............................ 429
!Inoperative See Opera tor's
Manual ................................................4 05
÷Inopera tive See Operator's
Manual ................................................ 407
TInope rative See Operator's
Manual ................................................ 409
GInope rative ................................... 414
ÂKe yNo tDe tected (red displ ay
message )............................................ .435
ÂKe yNo tDe tected (white dis‐
play message ).... ...
.............................
.434
Index 47
1