check engine MERCEDES-BENZ E-CLASS CABRIOLET 2018 User Guide

00BBMake surethat no engine oil is spilled
next tothefiller opening.
00BBAllow the engine tocool off and thor‐
oughly clean the engine oil from compo‐
nent parts before starting theve hicle.
0075 NO
TEEngine damage causedbyan
incor rect oil filter, incor rect oil or addi‐
tives
00BBDo not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forth e
service inter vals.
00BBDo not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an prescri bed.
00BBDo not use additives.
00BBFollow the instructions in the service
inter val display rega rding the oil
ch ange.
0075 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.
00BBHa ve excess engine oil remo ved at a
qu alified specialist workshop.
00BBTu rn cap 1counter-clockwise and remo ve
it.
00BBAd d engine oil.
00BBReplace cap 1and turn it clockwise as far
as it will go.
00BBCheck the oil le vel again (→page 318).
Checking coolant le vel
0071
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.
00BBLet the engine cool down and only
to uch the component parts described
as follo ws .
0071
WARNING Danger of burn s from hot
coolant
The engine cooling sy stem is pressurized,
particularly when the engine is warm. If you
Maintenance and care 31
9

openthe cap, you could bescalded byhot
coolant spr aying out.
00BBLet the mo tor cool down before opening
th e cap.
00BBWhen opening the cap, wearglove s and
pr otective eyew ear.
00BBSlowly turn the cap half a turn toallow
pressure toescape.
00BBPark theve hicle on a le vel sur face.
00BBCheck the coolant temp erature display in the
instrument clus ter.
The coolant temp erature must be below
15 8 °F (70 °C).
00BBSlowly turn cap 1counter-clockwise to
re lie ve ove rpressure.
00BBContinue 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.
00BBIf necessar y,top up with coolant that has
been appr ovedby Mercedes-Benz.
RFurther information on coolant (→page 391)
Ad ding washer fluid tothe windshield
wa sher sy stem
0071
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.
00BBLet the engine cool down and only
to uch the component parts described
as follo ws .
0071
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.
00BBBefore opening the hood, allow the
engine tocool down.
320
Maintenance and care

00BBWhen givingstarting assis tance, al ways
make sure that you only connect bat‐
te ry term inals with identical polarity.
00BBDuring starting assis tance, you must
observ eth e described order for con‐
necting and disconnecting the jumper
cables.
00BBDo not connect or disconnect the bat‐
te ry cla mp s while the engine is running.
0071
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture.
00BBAv oid fire , open flames, creating spar ks
and smoking.
00BBMake sure that there is suf ficient venti‐
lation du ring thech arging process and
during starting assis tance.
00BBDo not lean over a batter y.
Ifth e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen.
0071 WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, batte rygas may be released.
00BBAlw aysth aw a frozen batte ryout firs t
before charging it or per form ing start‐
ing assis tance.
The service li feof a battery that has been
th awe d may be dramatically shor tened.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop. All
vehicles
0075 NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine
Nume rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel.
00BBAv oid numerous and extended attem pts
to start the engine.
Obser vethefo llowing points during starting
assis tance and when charging the battery:
ROnly use undamaged jumper/charging
cables with a suf ficient cross-section and
insula tedte rm inal clamps.
RNon- insulated parts of thete rm inal clamps
must not come into con tact wi thother me tal
parts while the jumper/charging cable is
connected tothe battery/jump-s tart connec‐
tion point.
RThe jumper/charging cable must not come
into contact wi thany parts which may mo ve
when the engine is running.
Breakdown assist ance34
1

00BBTurn clip 2on co ver1 aqu arter-turn to
th e left.
00BBPull co ver1 upwards in the direction of the
ar row .
00BBRemo veany existing moisture from the fuse
box using a dry clo th.
00BBLoosen scr ews4, remo vefuse box lid 3
from theto p.
Closing
00BBCheck whe ther the seal is positioned cor‐
re ctly in the lid.
00BBInsert the lid into the brac ket at there ar of
th e fuse box.
00BBFo ld down lid of the fuse box and tighten
scr ews4.
00BBInsert co ver1 on bo thsides and engage
th e saf etyclips.
00BBTu rn clip 2on co ver1 one quarter-turn to
th eright.
00BBClose the engine hood.
Dashboard fuse box
The fuse box is on the side of the dashboard
under a co ver.
00BBConta ct an au thorized Mercedes-Benz Cen‐
te rfo r fur ther information.
Fu se box in the front-passenger foot we ll
Obser vethe no tes on electrical fuses
(→page 348).
350 Breakdown assis tance

Displaymessages
Possible causes/consequences and 0050Solutions
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heradar sensor sy stem is malfunctioning. Possible causes are:
RSoiling of the sensors
RHeavy rain
REx tended country driving wi thout moving traf fic, e.g. in the desert
Driving sy stems and driving saf etysy stems may be malfunctioning or temp orarily una vailable.
Once the cause of the problem is no longer present, driving sy stems and driving saf etysy stems are available again.
If th e display message does not disappear:
00BBPull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
00BBClean all sensors .
00BBRestart the engine.
0075
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he cor responding head air bag is malfunctioning.
0071
WARNING Risk of injury or death duetomalfunctions in the head air bag
If th e head air bag is malfunctioning, it might be triggered unintentionally or might not be triggered at all in the
eve nt of an accident wi tha high rate ofvehicle deceleration.
00BBHa ve the head air bag checked and repaired immediately at a qualified specialist workshop.
00BBConsult a qualified specialist workshop immediatel y.
Displaymessage s andwarning/indicator lamps 407

Displaymessages
Possible causes/consequences and 0050Solutions
00B2
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he engine oil le vel has dropped tothe minimum le vel.
0075 NO
TEEngine damage causedbydriving with insuf ficient engine oil00BBAv oid long journe yswith insuf ficient engine oil.
00BBCheck the engine oil le vel when next refueling.
To p up the engine oil (
→page 318).
No tes on engine oil (
→page 389).
00B6
)XHO /HYHO /RZ *T
he fuel supply has dropped into there ser verange.
00BBRe fuel.
00B6
*DV &DS /RRVH *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.
00BBClose the fuel filler cap.
00BBIf th e fuel filler cap was already proper lyclosed: consult a qualified specialist workshop.
00AC
*T hefan mo tor is defective.
00BBAv 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 there d marking.
424
Display messages and warning/indicator lamps

Displaymessages
Possible causes/consequences and 0050Solutions
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The transmission is malfunctioning. The transmission shifts toposition 005Cautomaticall y.
00BBPullover and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
00BBSwitch the transmission toposition 005D.
00BBConsult a qualified specialist workshop.
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he transmission is malfunctioning. Reversege ar can no longe r be engaged.
00BBVisit a qualified specialist workshop.
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he transmission is overheating. Pulling away may be temp orarily impaired or not possible.
00BBPull 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.
00BBLea vethe engine running.
00BBWa it until the display message disappears before pulling away.
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he auxiliary batteryforth e transmission is no longer being charge d.
00BBVisit a qualified specialist workshop.
00BBUn tilthen, alw ays manually set the transmission toposition 005Dbefore youswit choff the engine.
00BBBefore leaving theve hicle, apply the electric parking brake.
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peration of the climate control sy stem is temp orarily restricted. Air flow and fresh air supply are set toautomatic
mode.
00BBHa ve the climate control sy stem checked at a qualified specialist workshop.
434
Display messages and warning/indicator lamps

Warning/indicator lamp
Possible causes/consequences and 0050Solutions
0025
ABSwarning lamp The
yellow ABS warning lamp is lit while the engine is running.
ABS is malfunctioning.
If th ere is an additional warning tone, EBD is malfunctioning.
Other driving and driving safe ty systems may also be faulty.
0071
WARNING Thereisrisk of skidding if EBD or ABS is malfunctioning
If EBD or ABS is malfunctioning, the wheels could lock when braking
The steering capability and braking characteristics are thus se verely impaired .Th ebr aking dis tance in an emer‐
ge ncy braking situation can increase. In addition, other driving saf etysy stems are switched off.
00BBDrive on carefull y.
00BBHave the brake sy stem checked immediately at a qualified specialist workshop.
00BBDrive on carefully.
00BBObser vethe messages in the multifunction displa y.
00BBVisit a qualified specialist workshop.
00E5
ESP®wa rning lamp flashes The
yellow ESP
®wa rning lamp flashes while theve hicle is in motion.
ESP
®is inter vening.
00BBAd apt your drivin gst yle to suit thero ad and weather conditions.
44 8
Displ aymessage s andwarning/indicator lamps

Warning/indicator lamp
Possible causes/consequences and 0050Solutions
00E5
ESP®warning lamp lights
up The
yellow ESP
®wa rning lamp is lit while the engine is running.
ESP
®is malfunctioning.
Other driving and driving safe ty systems may also be malfunctioning.
0071
WARNING Risk of skidding if ESP®is malfunctioning
If ESP
®is malfunctioning, ESP®cannot car ryout vehicle stabilization. In addition, other driving saf etysy stems are
switched off.
00BBDrive on carefull y.
00BBHave ESP®checked at a qualified specialist workshop.
00BBDrive on carefully.
00BBObser vethe messages in the multifunction displa y.
00BBConsult aqualified specialist workshop.
Display messages and warning/indicator lamps 44
9

Warning/indicator lamp
Possible causes/consequences and 0050Solutions
00BB
ESP®OFFwarning lamp The
yellow ESP
®OFF warning lamp is lit while the engine is running.
ESP
®is deacti vated.
0071
WARNING Risk of skidding when driving wi thESP®deacti vated
If ESP
®is deactivated, ESP®cannot car ryout vehicle stabilization. The availability of fur ther driving saf etysy stems
is also limited.
00BBDrive on carefull y.
00BBOnly deactivate ESP®for as long as the situation requ ires.
If ESP
®cannot be activated, ESP®is malfunctioning.
00BBHa ve ESP®checked immediately at a qualified specialist workshop.
00BBObser vethe no tes on deactivating ESP®.
450
Display messages and warning/indicator lamps