2018 MERCEDES-BENZ S-CLASS COUPE open hood

#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

RThe jumper/charging cable must not come
into contact with any parts which may move
when 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 oved byMercedes-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 transmis‐
sion 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 anti-
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/charging cable. Alw ays begin with
positive clamp 4onyour ow nve hicle firs t.
Breakdown assist ance351

inthe fuse assignment diagram. The fuse assign‐
ment diagram is in theve hicle document wallet.
* NO
TEDama geor malfunctions caused
by moisture
Moisture may cause dama getothe electrical
sy stem or cause it tomalfunction.
#When the fuse box is open, make sure
th at no moisture can enter the fuse
box.
#When closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box.
Ifth e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop, e.g. an authorized Mercedes-Benz
Center.
Ensure thefo llowing before replacing a fuse:
RThe vehicle is secured against rolling away.
RAll electrical consumers are switched off.
RThe ignition is switched off. The electrical fuses are located in
thefo llowing
fuse bo xes:
RFu se box in the engine compartment on the
driver's side (→page 358)
RFu se box on the driver's side of the dash‐
board (→page 359)
RFu se box in the front-passen gerfo ot we ll
(→page 360)
Opening and closing the fuse box in the
engine compa rtment
Requ irements:RObser vethe no tes on electrical fuses
(→page 357).
RHa ve thefo llowing tools readily available:
-A dry clo th
-A screwdriver 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.
358 Breakdown assis tance

#Release 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 lid 3.
#Insert lid3into the brac ket at there ar of
th e fuse box.
#Fo ld down lid 3ofthe fuse box and tighten
scr ews4.
#Insert co ver2 on bo thsides and engage
re taining clips 1.
#Closethe hood.
Opening and closing the fuse box in the
da shboard
The fuse box is on the side of the dashboard
under a co ver.
Breakdown assis tance 359

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).
426
Display message s andwarning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
Active Hood Malfunction
See Operator's Manual *T
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 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 hood.
C
*A t least one door is open.
#Close all doors.
440
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.
460
Display messages and warning/indicator lamps

Synchronizingthero lling code ............ .144
Gas station sear ch
St arting an automatic gasst ation
sear ch................................................. 256
Switching the automatic gasst ation
sear chon/off ...................................... 261
Gasoline ................................................... 396
Gearshift paddles see Steering wheel paddle shif ters
Gearshift recommendation ....................139
Genuine parts ............................................ 21
Glasses compartment .............................100
Glo vebox
Air vent ................................................ 126
Locking/unlocking .............................. 100
H
Handbrake see Electric parking brake
Handling characteristics (unusual) ........361
HANDS-FREE ACCESS ................................ 68
Haza rdwa rning lamps ............................ .111 Head air bag
.............................................. 40
Head le vel heating (AIRSCARF) ................ 93
Head restra int ............................................ 87
Fr ont (adjusting manually) ..................... 87
Re ar (extending and retracting) ............. 88
Re ar (extending from the front) ............ .88
Head-up Display ....................................... 213
Ad justing brightness (on-board com‐
pu ter) ................................................... 213
Ad justing display elements (on-board
compu ter) ............................................ 213
Fu nction ............................................... 214
Menu (on-board computer) .................. 213
Setting the position (on-board com‐
puter) ................................................... 213
Switching on/off ................................. 215
Using the memory function .................. .96
Headliner (care) ....................................... 338
High-beam flasher ................................... 110
High-beam flasher see Combination switch
High-beam headlamps Activating/deactivating .......................1 10Ad
aptive Highbeam Assist .................. .112
High-beam headlamps see Combination switch
Hill star t assist
........................................ 173
HOL

D function ......................................... 174
Ac tivating/deactivating .......................1 74
Fu nction/no tes .................................... 174
Hood Function (active hood) .........................3 24
Opening/closing ................................. 324
Re setting (active hood) ........................ 324
Hotspot Setting up (Wi-Fi) ................................. 242
I
Identification pla te
Engine ................................................. 393
Re frigerant .......................................... 400
Ve hicle ................................................ 393
Ignition Switching on (S tart/S top button) ........ 128
Ignition key
see SmartK ey
Index47
9