check engine light MERCEDES-BENZ E-CLASS SALOON 2015 User Guide

Important safety notes
The reversing camera is only an aid. It is no
ta
substitut efor your attention to th eimmediate
surroundings. The responsibilit yfor safe
manoeuvrin gand parking remains wit hyou.
Mak esure that there are no persons, animals
or objects in range while manoeuvrin gand
parking.
Under th efollowin gcircumstances, the
reversing camera will no tfunction ,orwill
function in alimited manner:
R if th eboot lid or tailgat eisopen
R in heav yrain ,sno worf og
R at night or in ver ydark places
R if th ecamera is expose dtoveryb right light
R if th earea is lit by fluorescent bulbs or LED
lighting (the display may flicker)
R if there is asudde nchang eint emperature,
e.g. when driving int oaheated garag ein
winter
R if th ecamera len sisdirtyoro bstructed.
Observ ethe note sonc leaning
(Y page 390)
R if th erear of your vehicl eisdamaged. In this
case, have th ecamera position and setting
checke dataq ualified specialist workshop
The field of vision and other function softhe
reversing camera may be restricted due to
additional accessories on th erear of th evehi-
cle (e.g. licence plat eholder, bicycle rack).
On vehicles wit hheight-adjustable chassis,
leaving th estandard height can result in inac-
curacie sintheguide lines, depending on
technical conditions.
i The reversing camera is protected from
raindrops and dust by mean sofaflap.
When th ereversing camera is activated,
this flap opens.
The flap closes again when:
R you have finishe dthe manoeuvrin gproc-
ess
R you switch off th eengine
R you open th eboot Se
et he note sonc leaning (Y page 390).
Fo rtechn ical reasons, th eflap may remain
open briefly after th ereversing camera has
been deactivated.
Activating/deactivating th ereversing
camera X
To activate: makesure that th ekeyis in
position 2in th eignition lock.
X Mak esure that the ActivationbyR
Activatio nbyR
gear
gear function is selected in Audio 20 or
COMAND Online; see th eDigital Owner's
Manual.
X Engage revers egear.
The reversing camera flap opens. The area
behind th evehicl eiss hown wit hguide lines
in th eAudio 20 or COMAND Onlin edisplay.
The imag efromt hereversing camera is
available throughout th emanoeuvring
process.
X To switch th efun ction mod efor vehi-
cles with traile rtow hitch: usingthe con-
troller ,select symbol :for th e"Reverse
parking "function or symbol ;for "Cou-
plin gupat railer".
The symbol of th eselected function is high-
lighted.
To deactivate: ther eversing camera deacti-
vates if you shif tthe transmission to Por after
driving forwards ashort distance. Driving systems
245Driving and parking Z

spot monitoring range from behind or from
the side. When you overtake avehicle, the
warning only occurs if the difference in speed
is less than 12 km/h.
The yellow indicator lamp goes out if reverse gear is engaged. Blind Spot Assist is then
deactivated.
The brightness of the indicator or warning
lamps is adjusted automaticallya ccording to
the ambient light.
Collision warning
If av ehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal, adoublew arning
tone sounds. Red warning lamp :flashes. If
the turn signal remains on, detected vehicles
are indicated by the flashing of red warning
lamp :.There are no further warning tones.
Activating Blind Spot Assist X Make sure that Blind Spot Assist is activa-
ted in the on-board computer
(Y page 288).
X Turn the key to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors
light up red for approximately 1.5 seconds
and then turn yellow.
Towing atrailer
If you couple up atrailer, make sure that you
have correctly established the electrical con- nection. This can be accomplished by check-
ing the trailer lighting. Blind Spot Assist is
then deactivated. The indicator lamps in the
exterior mirrors light up yellow and the
Blind
Blind Spot SpotAssist
Assist not
notavailable
available when
when
towing atrailer See Owner's Manual
towing atrailer See Owner's Manual
message appears in the multifunction dis-
play.
i You can deactivate the indicator lamps in
the exterior mirrors. To do so, you will need to deactivate Blind
Spot Assist if:
R the key is in position 2in the ignition lock
R the engine is not running
R the electrical connection to the trailer
has been established
Lane Keeping Assist General notes
Lane Keeping Assist monitors the area in
front of your vehicle by means of camera
:
at the top of the windscreen. Lane Keeping
Assist detects lane markings on the road and
can warn you before you leave your lane unin-
tentionally.
This function is available within aspeed range
between 60 km/h and 200 km/h.
Aw arning may be given if afront wheel
passes over alane marking. It will warn you by
means of intermittent vibration through the
steering wheel for up to 1.5 seconds.
Important safety notes G
WARNING
Lane Keeping Assist cannot always clearly
identify lane markings.
In these cases, Lane Keeping Assist may:
R give an unnecessary warning
R not give awarning
There is arisk of an accident.
Always pay particular attention to the traffic
situation and keep in lane, especiallyifL ane
Keeping Assist alerts you. Driving systems
259Driving and parking Z

Display messages
Possible causes/consequences and
M
MSolutions J
Check brake fluid Check brake fluid
level level There is insufficien
tbrak efluidint hebrak efluidr eservoir.
In addition ,the red J warnin glamp lights up in th einstrument
cluster and awarnin gtones ounds.
G WARNING
Braking efficiency may be impaired.
There is ariskofana ccident.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions. Do no tcontinu edriving
under any circumstances.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Consult aqualified specialist workshop.
X Do no ttop up th ebrak efluid. This does no tcorrect thef ault. #
Check brake pad Check brake pad
wear wear The brak
epads/lining shaver eached their wear limit.
X Consult aqualified specialist workshop. G
inoperative inoperative On
eorm orem ain features of th eMercedes-Ben zConnect system
are malfunctioning.
X Hav ethe system checke dataqualified specialist workshop. Collision Preven‐
Collision Preven‐
tio
nA ssist Plus
tio nA ssist Plus
currently unavail‐ currently unavail‐
abl eS ee Owner's
abl eS ee Owner's
Manual Manual COLLISION PREVENTION ASSIST PLU
Sistemporarily inoperative.
Possibl ecauses:
R ther ada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion soro ther source sofelectromagnetic radiation
R thes ystem is outside th eoperating temperature range
R theo n-bo ardv oltag eistoolow
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
COLLISION PREVENTION ASSIST PLU Sisoperational again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Restart th eengine. Collision Preven‐
Collision Preven‐
tio
nA ssist Plus
tio nA ssist Plus
inoperative inoperative COLLISION PREVENTION ASSIST PLU
Sistemporarily inoperative
due to amalfunction .Adaptive Brake Assis tmay also hav efailed.
X Consult aqualified specialist workshop. Display
messages
303On-boardcomputer an ddisplays Z

Problem
Possible causes/consequences and
M
MSolutions ֌
The yellow ESP
®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. ESP
®
,B AS ,BAS PLUS with Cross-Traffic Assist ,COLLISION PRE-
VENTION ASSIST PLUS, PRE-SAFE ®
,P RE-SAFE ®
PLUS,
PRE‑SA FE®
Brake, the HOLD function, hill start assist, ESP ®
trailer
stabilisation and the adaptive brake lights are unavailabl edue to a
malfunction.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above.
The braking distanc emay thus increase in an emergenc ybraking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Consult aqualified specialist workshop. 6
The red restraint sys-
tem warning lamp is lit
while the engine is run-
ning.
The restraint system is faulty.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident ,may not be triggered.
This poses an increased risk of injury.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Have the restraint system checked immediately at aqualified
specialist workshop.
Observe the additional information on the restraint system
(Y page 44). Warning and indicator lampsint
he instrument cluster
335On-board computer and displays Z

Engine
Problem
Possible causes/consequences and
M
MSolutions ;
The yellow engin
ediag-
nostics warning lamp
light supw hile the
engin eisrunning. Ther
emay be afault ,for example:
R in th eenginem anagement
R in th efuel injection system
R in th eexhaust system
R in th eignition system (for vehicle swith petrol engines)
R in th efuel system
The emission limit values may be exceeded and th eenginem ay be
runnin ginemergency mode.
X Hav ethe vehicle checked as soon as possible at aqualified
specialist workshop. Vehicle
swithadiese leng ine: th efuel tan khas been run dry
(Y page 204).
X Afte rrefuellin gstart th eenginet hree to four times.
If th eyellow engin ediagnostics warning lamp goes out ,emer-
gency runnin gmode is cancelled. The vehicle need no tbe
checked. 8
The yellow reserv
efuel
warning lamp is on
while th eengineisr un-
ning. The fuel leve
lhas dropped int othe reserv erange.
Operatio noftheauxiliar yheating is deactivate difthefuel level
drops int othe reserv erange.
X Refuel at th eneares tfillin gstation. ?
The red coolant warn-
ing lamp light
supwhile
th ee ngineisr unning
and th ecoolant tem-
perature gauge is at the start of th escale. The temperatur
esensor for th ecoolant temperatur egauge is
faulty.
The coolant temperatur eisnolonger bein gmonitored. Ther eisa
risk of engin edamage if th ecoolant temperatur eistoohigh.
X Stop th evehicle immediately, paying attentio ntoroad and traf-
fic conditions, and switch off th eengine. Do no tcontinue driving
unde rany circumstances.
X Safeguard th evehicle against rolling away (Y page 205).
X Consult aqualifie dspecialist workshop. 336
Warning and indicator lamps in th
einstrumen tclusterOn-boar dcomputer and displays

Problem
Possible causes/consequences and
M
MSolutions X
Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
warning notes (Y page 382).
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid putting the engine under heavy load as you do so, e.g.
driving in mountainous terrain and stop-start traffic. Driving systems
Problem
Possible causes/consequences and
M MSolutions ·
The red distance warn-
ing lamp lights up while
the vehicle is in motion. The distance to the vehicle in front is too small for the speed
selected.
X Increase the distance. ·
The red distance warn-
ing lamp lights up while
the vehicle is in motion. Aw arning tone also
sounds. You are approaching
avehicle, apedestrian or astationary obsta-
cle in your line of travel at too high aspeed.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
Observe the additional information on PRE‑ SAFE®
Brake
(Y page 87).
Observe the additional information on the distance warning func-
tion of COLLISION PREVENTION ASSIST PLUS (Y page 80).338
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Opening the bonnet
G
WARNING
Certain componentsint he engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is arisk of injur ywhen accessin gthe
engin ecompartment.
As far as possible, allow the engine to cool
down and only touch the componentsd escri-
bed in the following. G
WARNING
When the bonnet is open, and the windscreen wipers are set in motion ,you can be injured by
the wiper linkage. There is arisk of injury.
Always switch off the windscreen wipers and
the ignition before opening the bonnet.
! Make sure that the windscreen wipers are
not folded away from the windscreen. Oth-
erwise, you could damage the windscreen
wipers or the bonnet. X
Make sure that the windscreen wipers are
switched off.
X Pull release lever :on the bonnet.
The bonnet is released. X
Reach intot he gap, pull bonnet catc hhan-
dle ;up and lift the bonnet.
If you lift the bonnet by approximately
40 cm, the bonnet is opened and held open automatically by the gas-filled strut.
Closing the bonnet X
Lower the bonnet and let it fall from a
height of approximately 20 cm.
X Check that the bonnet has engaged prop-
erly.
If the bonnet can be raised slightly, it is not
properly engaged. Open it again and close
it with alittle more force. Radiator
Vehicles with adiesel engine: do not cover
the radiator. Do not use thermal mats, insect
protection cover soranythin gsimilar. Doing
so can cause the Onboard Diagnostics Sys-
tem to display inaccurate values. Some of
these values are legally required and must
alway sbec orrect. Engine oil
General notes G
WARNING
Hybrid vehicles: ensure that you read the
"HYBRID "supplement .You could otherwise
fail to recognise dangers. 380
Engine compartmentMaintenance and care