2018 MERCEDES-BENZ S-CLASS SEDAN hood open

#Park theve hicle on a flat 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 lie ve ove rpressure.
#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)
ove r mar ker bar 2
#If necessar y,add coolant that has been
appr ovedby Mercedes-Benz.
RFurther information on coolant (→page 451)
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
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.
384 Maintenance and care

is connectedto the battery/jump-s tart con‐
nection point.
RThe jumper cable/charg ing cable must not
come into con tact wi thany parts which may
mo vewhen the engine is running.
RAlw ays make sure that nei ther you nor the
battery is elect rostatically charge d.
RKe ep away from fire and open flames.
RDo not lean overth e batter y.
RWhencharging: only use battery charge rs
te sted and appr ovedby Mercedes-Benz, and
please read the battery charge r's operating
instructions before charging the batter y.
Obser vethe additional following points during
st arting assis tance:
RSt arting assis tance may only be pr ovided
using batteries with a nominal voltage of 12
V.
RThe vehicles must not touch.
RGa soline engine: Onlyaccept starting assis‐
ta nce if the engine and exhaust sy stem are
cold.
#Secure theve hicle byapplying the electric
parking brake.
#Au tomatic transmission: Shiftthe trans‐
mission toposition B.
#Make sure that the ignition and all electrical
consumers are switched off.
#Open the hood.
#Ve hicles with ground point co ver:tur n
sc rews 2 from ground point co ver1 coun‐
te r-clockwise and remo veground point co ver
1.
#Slide co ver3 of positive clamp 4onthe
jump-s tarting connection point in the direc‐
tion of the ar row.
#Connect positive clamp 4onyour vehicle to
positive pole of the donor battery using the
jumper cable/charging cable. Alw ays begin
with positive clamp 4onyour ow nve hicle
fi rs t.
Breakdown assist ance403

Opening
&WARNING Risk of injury from usingthe
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.
#Re lease retaining clips 1.
Pull co ver2 up.#Remo veany existing moisture from the fuse
box using a dry clo th.
#Loosen scr ews4, remo vefuse box lid 3
from theto p.
Closing
#Check whe ther the seal is positioned cor‐
re ctly in the lid.
Breakdown assis tance 41
1

#Insertthe lid into the brac ket at there ar of
th e fuse box.
#Fo ld down lid of the fuse box and tighten
scr ews4.
#Insert co ver2 on bo thsides and engage
re taining clips 1.
#Closethe hood.
Dashboard fuse box
The fuse box is on the side of the dashboard
under a co ver.
#Open co ver1 inthe direction of the ar row
and remo veit.
Fuse box in the front-passenger foot we ll
Requirement:RObser vethe no tes on electrical fuses
(→page 410).
#Open cover1 inthe direction of the ar row
and remo veit.
Fuse box in the trunk
Re quirement:RObser vethe no tes on electrical fuses
(→page 410).
#Fo ld co ver1 down in the direction of the
ar row .
412
Breakdown assis tance

Engine
Display messagesPossible causes/consequences and MSolutions
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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 .
?
&RRODQW 7RR +RW 6WRS 9HKL
FOH 7XUQ (QJLQH 2II *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).
482
Display message s andwarning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
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he active hood (pedestrian pr otection) is malfunctioning or inoperative af ter having already been triggered.
#Vi sit a qualified specialist workshop.
M
*T he engine hood is open.
&
WARNING Risk of accident if the engine hood is unlatched while driving
An unloc ked engine hood may open up when theve 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.
#Pull over and stop theve hicle safely as soon as possible.
#Close the engine hood.
C
*A t least one door is open.
#Close all doors.
Displ aymessage s andwarning/indicator lamps 497

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.
#Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. Do not con‐
tinue 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.
Display messages and warning/indicator lamps 51
5

Rear (luxury head restra int) ................ .104
Re ar (setting the last position) ............ .103
Head-up Display ...................................... 253
Ad justing brightness (on-board com‐
pu ter) .................................................. 253
Ad justing display elements (on-board
compu ter) ............................................ 253
Fu nction .............................................. 254
Menu (on-board compu ter) .................. 253
Setting the position (on-board com‐
puter) .................................................. 253
Switching on/off ................................. 255
Using the memory function .................. 113
Headlamp flashing .................................. 144
Headliner (care) ....................................... 390
Headphones (Rear Seat Entertain‐
ment Sy stem)
Ac tivating/deactivating .......................3 65
Ad justing thevo lume .......................... .365
Overview ............................................. 364
Re placing batteries ............................ .365
Selecting a rear passenger compart‐
ment display ........................................ 365 High beam
Swit ching on/off ................................ .144
High-beam headlamps Adaptive Highbeam Assist .................. .146
Hill start assist ........................................ 210
HOLD function ......................................... 210
Fu nction/no tes ............ ........................
210
Sw

itching on/off ................................. 210
Hood Function (active hood) ......................... 378
Opening/closing ..................................3 78
Re setting (active hood) ........................ 378
Hotspot Setting up (Wi-Fi) ................................. 281
Hydropneumatic suspension see MAGIC BODY CONTROL
I
Identification plate Engine .................................................4 45
Re frigerant .......................................... 453
Ve hicle ................................................ 445 Ignition
Swit ching on (s tart/s top button) ........ .165
Ignition key
see SmartK ey
Immobilizer ................................................ 86
Indicator lamp see Warning/indicator lamps
Individual drive prog ram
Confi guring .......................................... 173
Selecting .............................................. 173
Instrument clus ter
see Instrument display
see Warning/indicator lamps
Instrument display .................................. 244
Ad justing the lighting ........................... 247
Fu nction/no tes ................................... 244
Overview ............................................. 244
Wa rning and indicator lamps (o verview) .. 8
Wa rning/indicator lamps .................... .501
Instrument lighting .................................247
Intelligent Light Sy stem
Cornering light function ...................... .146
Inter changing wheels .............................4 35
Index535