2018 MERCEDES-BENZ S-CLASS SEDAN engine overheat
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The probability of a serious oreven fata l acci‐
dent greatly inc reases if youdriv e when
under the influence of alcohol or drugs.
#Do not drink alcohol or take drugs while
driving, and do not allow an yone to
drive who has been drinking alcohol or
ta king drugs.
&
WARNING Risk of accident due tothe
brake sy stem overheating
If yo u lea veyour foot on the brake pedal
when driving, the brake sy stem may over‐
heat.
This increases the braking dis tance and the
brake sy stem may evenfa il.
#Ne ver use the brake pedal as a foot re st.
#Do not depress the brake pedal and the
accelerator pedal at the same time
while driving.
* NO
TEWearing out the brake linings by
continuously dep ressing the brake pedal
#Do not depress the brake pedal contin‐
uously whilst driving.
#To use the braking ef fect of the engine,
shift toa lo werge ar in good time.
* NO
TEDama getothe driv etra in and the
engine when pulling away
#Do not warm upthe engine when the
ve hicle is stationar y.Pull away immedi‐
atel y.
#Avoid high engine speeds and driving at
full thro ttle until the engine has reached
operating temp erature.
#Do not allow the wheels tospin.
* NO
TEDama getothe catalytic con verter
due tonon-combu sted fuel
The engine is not running smoot hly and is
misfiring.
Non-combus ted fuel may get into the cata‐
lytic con verter.
#Only depress the accelera tor pedal
slightl y.
#Have the cause rectified immediately at
a qu alified specialist workshop.
Limited braking ef fect on salt-treate dro ads:
RDue tosalt build-up on the brake discs and
brake lining, the braking dis tance can
increase conside rably or result in braking
only on one side.
RMaintain a much greater dis tance totheve hi‐
cle in front.
To preve nt salt build-up:
RBrake occasionally while paying attention to
th e tra ffic conditions.
RCarefully depress the brake pedal at the end
of the journey and when starting the next
journe y.
170
Driving and pa rking
Page 199 of 562
Cruise cont rol is operated using the cor respond‐
ing steering wheel buttons. You can store any
ro ad speed abo ve15 mp h (20 km/h).
If yo ufa ilto adapt your drivin gst yle, cruise con‐
trol can neither reduce therisk of an accident
nor override the la wsof ph ysics. It cannot take
into account road, weather or traf fic conditions.
Cruise control is only an aid. You are responsible
fo rth e dis tance totheve hicle in front, forve hi‐
cle speed, for braking in good time and forst ay ‐
ing in lane.
Displa ysinthe multifunction display
The status of cruise control and thestored
speed are shown in the multifunction displa y.
1Cruise control is selecte d
2Speed is sa ved, cruise control is deactivated
3Speed is sa ved, cruise control is activated
% The segments between thestored speed and
th e end of the segment display light up in
th e speedome ter.
Sy stem limitations
Cruise control may be unable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lo werge ar in good time on long
and steep downhill gradients. Take particular
no te ofthis when driving a laden vehicle. By doing so,
youwill make use of the braking ef fect
of the engine. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Do not use cruise control in thefo llowing situa‐
tions:
RIn traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads
ROn slippery roads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid
RWhen visibility is poor
Operating cruise control
& WARNING Risk of accident due tostored
speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates.
#Ta ke into account the tra ffic situation
before calling up thestored speed.
Driving and parking 19
7
Page 453 of 562
Notes on brake fluid
Obser vethe no tes on operating fluids
(→page 447).
&
WARNING Risk of an accident due to
va por poc kets form ing in the brake sys‐
te m
The brake fluid cons tantly absorbs moist ure
from the air. This lo wersthe boiling point of
th e brake fluid. If the boiling point is too lo w,
va por poc kets may form inthe brake sy stem
when the brakes are applied hard.
This causes the braking ef fect to be
impaired.
#Ha ve the brake fluid rene we d at the
specified inter vals.
Ha ve the brake fluid regularly changed at a quali‐
fi ed specialist workshop.
Only use brake fluid appr ovedby Mercedes-Benz
according toMB-F reigabe or MB-Appr oval 33 1.0. Fu
rther information on brake fluid:
RIn the Mercedes-Benz Specifications for
Operating Fluids at http://be vo.mercedes-
benz.com
RAt aqu alified specialist workshop
Coolant
Note s on coolant
Obser vethe no tes on operating fluids
(
→page 447).
&
WARNING ‑ Risk of fire and injury from
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite.
#Allow the engine tocool down before
adding antifreeze.
#Make surethat no antifreeze spills out
next tothefiller opening.
#Thoroughly clean off any antifreeze
from component parts before starting
th eve hicle.
* NO
TEDama gecaused byincor rect cool‐
ant
#Only add coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction.
Fu rther information on coolant:
RIn the Mercedes-Benz Specifications for
Operating Fluids 310.1, e.g. online at
http://be vo.mercedes-benz.com.
RAt aqu alified specialist workshop.
* NO
TEOverheating at high outside tem‐
peratures
If an inappro priate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐
te cted against overheating and cor rosion at
high outside temp eratures.
Tech nical da ta451
Page 484 of 562
Engine
Display messagesPossible causes/consequences and MSolutions
& K H F N & R R O D Q W / H Y H O 6 H H
2 S H U D W R U
V 0 D Q X D O *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 .
?
& R R O D Q W 7 R R + R W 6 W R S 9 H K L
F O H 7 X U Q ( Q J L Q H 2 I I *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
Page 496 of 562
Displaymessages
Possible causes/consequences and MSolutions
6 W R S 9 H K L F O H / H D Y H ( Q J L Q H
5 X Q Q L Q J : D L W 7 U D Q V P L V V L R Q
& R R O L Q J *T
he transmission has overheated. Pulling away can be temp orarily impaired or not possible.
#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.
#St art the engine.
#Wa it until the display message disappears before pulling away.
$ X [ L O L D U \ % D W W H U \ 0 D O I X Q F
W L R Q *T
he auxiliary batteryforth e transmission is no longer being charge d.
#Visit a qualified specialist workshop.
#Un tilthen, manually set the transmission toposition jbefore you switch offthe engine.
#Before leaving theve hicle, apply the electric parking brake.
$ L U & R Q G L W L R Q L Q J 0 D O I X Q F
W L R Q 6 H H 2 S H U D W R U
V 0 D Q X D O *O
peration of the climate control sy stem is temp orarily restricted. Air flow and fresh air supply are set toautomatic
mode.
#Ha ve the climate control sy stem checked at a qualified specialist workshop.
494
Display messages and warning/indicator lamps
Page 517 of 562
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
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