2010 MERCEDES-BENZ E-CLASS CABRIOLET check engine

Problem Possible causes/consequences and
M Solutions
8
The yellow reserve fuel
warnin
glamp lights up
while the engine is run-
ning. The fuel level has fallen below the reserve range.
The fuel tank must be filled at least to the reserve fuel level to
prevent impairment to the running of the engine.
X Refuel at the nearest filling station. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature senso
rfor the coolant temperatur egauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Engage the parking brake.
X Consult aqualified specialist workshop. ?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
The coolant level is too low.
If the coolant level is correct, the airflow to the radiator may be
blocked or the electric radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Allow the engine and coolant to cool.
X Check the coolant level and top up the coolant (Y page 261).
Observe the warning notes.
X If the coolant needs topping up more often than usual, have the
engine coolant system checked.
X Make sure that the air suppl ytot he radiator is not blocked, e.g.
by snow, slush or ice.
X If the coolant temperature is less than 12 0†,you can con tinue
driving to the neares tqualified specialist workshop.
X Avoid subjecting the engine to heavy loads ,e.g. driving in moun-
tainous terrain, and stop-s tart driving. ?
Th
er ed coolan twarn-
ing lamp comes on
while the engine is run-
ning. Awarning tone
also sounds. The coolant temperature has exceeded 120 †. The airflow to the
radiator may be blocked or the coolant level may be too low.
The engine is not being cooled sufficiently and may be damaged.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Allow the engine and coolant to cool. Warnin
gand indicator lam psin th einstru ment cluster
241On-board computer and displays
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Vehicl
eequipment
i Thismanua ldesc ribe sallthe standard
and optional equipment of your vehicle
which wa savailable at th etime of pur-
chase. Countr y-specif ic differences are
possible. Bear in mind tha tyour vehicle
ma ynot featur eall function sdescribed
here. Engine comp
artment Bonnet
Active bonnet (pedestrian protection) Operating principle
i
The activ ebonnet is only available in cer-
tain coun tries.
The activ ebonnet can reduce the risk of injury
to pedestrian sincertain acciden tsituations.
Raising the bonnet increases the clearanc eto
har dcomponents, such as the engine. If active bonnet
:has been triggered, it is
raised at the back by about 50 mm .Then,
lids ;no longer rest on housings =.
You can reset atriggere dbonnet yourself.
! Do not tr ytopressdown the raised bon-
net at the back .Otherwi se,the bonnet
could be damaged.
If the act iveb onnet is triggered, yo ucan also
continue driving and have it reset at aquali-
fied specialis tworkshop. If you pull the bon- net release lever, you must reset the bonnet
befor edriving on. G
Ris
kofa ccident
If you pull the bonnet release lever and then
neglect to reset the bonnet, it will not lock at
the front when closed. The bonnet can then
open when the vehicle is in motion and
obscure your field of vision. If you pull the
bonnet release lever, you must reset the bon-
net before driving on.
Resetting G
Risk of injury
There is arisk of injur yifthe bonnet is open,
even if the engin eisnot running.
Som eengine compone ntsc an become very
hot.
To avoid the risk of burns, only touch those
components described in the Owner's Manual
and observe the relevant safety notes.
X Open the bonnet (Y page 259). Coupé (example)
X
Lift up the bonnet in centre Awith both
hands until the two lids of bonnet lifter ;
no longer move.
If you push the lids back, you will notice a
resistance.
X Releas ebonnet :.
X Check whether the lids of bonnet lifter ;
ar er estin gont he housings =(arrow). 258
Engine compartmentMaintenance and care
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X
Pull release lever :on the bonnet.
The bonnet is released.
! Make sure that the windscreen wiper sare
not folde daway from the windscreen .Oth-
erwise, yo ucould damage the windscreen
wipers or the bonnet. X
Reach int othe gap, pull bonnet catch han-
dle ;up and lift the bonnet.
Closin gthe bonnet G
Ris
kofi njury
Make sure tha tnobody can becom etrapped
as you close th ebonnet.
X Lower the bonnet and let it fal lfrom a
height of approximatel y20c m.
X Check that th ebonnet has engaged prop-
erly.
If the bonnet can be raised slightly ,itisn ot
properly engaged. Open it again and close
it with alittle more force. Engine oil
Notes on the oil level Depending on drivin
gstyle, the vehicle con-
sumes amaximum of 0.8 loil per 100 0km.
Th eo il consumption may be higher than this
when the vehicle is new or if you frequently
drive at high engine speeds.
When checking the oil level:
R park the vehicle on alevel surface.
R the engine should be switched off for at
least fiv eminutes if the engine is at normal
operating temperature.
R the engine should be switched off for at
least thirt yminutes if the engine is not at
normal operating temperature, e.g. if the
engine was only started briefly.
Checking the oil level using the oil dip-
stick Depending on the engine, the oil dipstick may
be installed at
adifferent location. E3
50 (example)
X Pull oi ldipstick :out of the oil dipstick
tube.
X Wipe off oil dipstick :.
X Slowly insert oil dipstick :into the oil dip-
stick tube to the stop, and take it out again.
The oil level is correc tifthe level is between
MIN mark =and MAX mark ;.
X Top up the oil if necessary. 260
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Adding engine oil
H
Environmenta
lnote
When toppin guptheoil, tak ecaren ot to spill
any .Ifo il enter sthe soil or waterways, it is
harmful to the environmen t.Engine oil cap (example)
X
Turn cap :anti-clockwise and remove it.
X Top up with the amount of oil required.
Fill carefully to the maximum mark on the oil
dipstick.
i Depending on the engine, the difference
between the minimum mark and the maxi-
mum mark is approximately 1.5 –2litres.
! Do not add too muc hoil. If the oil level is
above the "max "mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic con-
verter .Have excess oil siphoned off.
Further information on engin eoil
(Y page 315).
X Replac ecap : on the filler nec kand
tighten clockwise.
Ensure that the cap locks int oplace
securely. Checking and addin
gother service
products
Checking th ecoolan tlevel Only check th
ecoolant leve lwhen th evehicle
is on alevel surface and th eengine has cooled
dow n.
X Tur nthe ke ytop osition 2(Y page 135) in
th ei gnitio nlock.
On vehicles with KEYLESS -GO, press the
Star t/Stop butto ntwice (Y page 135).
X Check the coolant temperature display in
the instrument cluster. G
Risk of injury
The cooling system is pressurised. Therefore,
only unscrew the cap once the engine has
cooled down. The coolant temperature gauge
must display less than 70 †.Otherwi se,you
could be scalded if ho tcoolant escapes. X
Slowl yturn cap :half aturna nti-clock-
wis eand allo wexcess pressure to escape.
X Turn cap :further anti-clockwis eand
remove it.
If the coolant is at the level of marker bar
= in the filler neck when cold, ther eis
enough coolan tincoolant expansion
tank ;.
If the coolant is approximately 1. 5cm
higher when it is warm, ther eisenough
coolant in coolant expansion tank ;. Engin
ecompartment
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the
mtoa Mercedes-Benz Service Centre or
to as pecial collectio npoint for old batteries. G
Risk of inju
ry
Fo rs afety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. Thes ebatteries provide
increased impact protection to prevent vehi-
cle occupant sfrom suffering aci dburns
should the battery be damaged in the event
of an accident.
To prevent acid burns, observe the following
safety notes when handling batteries:
R do not lean over the battery.
R do not place any metal objects on abattery.
Otherwise ,you coul dcause ashort circuit
and the battery's gas mixtur ecould ignite.
R mak esure that you do not create an elec-
trostatic charge, e.g. by wearing synthetic
clothing or as aresult of friction on fabrics.
Therefore, you should not pull or slide the
batter yover carpets or other synthetic
materials.
R neve rtouch the battery first. To discharge
ap ossible electrostatic charge, step out of
the vehicle first and touc hthe bodywork.
R do not wipe the battery usin gacloth. The
battery may explode as aresult of electro-
static charge or due to flying sparks.
! Switc hoff th eengine and remove the key
before disconnectin gthe termi nalclamps
from the battery .Onvehicles with KEY-
LE SS -GO, make sure that the ignition is
switched off. Check that all the indicator
lamps in the instrument cluste rare off.
Otherwise, yo umay destroy electronic
components, such as the alternator.
i Remove the key if you park the vehicle
and do not require any electrical consum-
ers. The vehicle will then use very little
energy, thus conserving battery power.
Mercedes-Benz recommends that you do not
carr yout work on batteries yourself, e.g.
removing, charging or replacing. Always have this work performed at
aqualified specialist
workshop, e.g. aMercedes-Ben zService
Cent re. Installation location of the battery
Your vehicle is equippe dwithabatter yint he
engin ecompartmen t. Itis located on the front
bulkhea dunder the filter box on the right-
hand sid eofthe vehicle when viewed in the
direction of travel.
X Appl ythe parkin gbrake firml yand on vehi-
cles with automati ctransmission, shift the
transmission to position P.
X Switch off all electrica lconsumers, e.g.
radio, blower ,etc.
X Turn the key to position 0(Ypage 135) in
the ignition lock and remove it, or, with
KEYLESS-GO, make sure that the ignition
has bee nswitched off (Y page 135). All
indicator lamps must be off in the instru-
ment cluster.
X Open the bonnet (Y page 259). X
Release clamps ;on filter box :.
X Remove filter box :.
i Information on disconnecting the battery
(Y page 286). Disconnecting the battery
G
Risk of accident
If the battery is disconnected: 286
BatteryBreakdown assistance
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Position number
Bidentifie sthe charged batter yofthe other vehicle or an equivalen tjump-
starting device.
X Slide cover :of positive terminal ;in the direction of the arrow.
X Connec tpositiv eterminal ;on your vehicle to positiv eterminal =of donor battery B
using the jum plead, beginning with your own battery.
X Start the engine of the donor vehicle and run it at idling speed.
X Connect negative terminal ?of donor battery Bto eart hpoint Aof your vehicle using
the jum plead, connectin gthe jum plead to donor battery Bfirst.
X Start the engine.
X First remove the jum plead from eart hpoint Aand negative terminal ?,then from positive
terminal ;and positive terminal =,each time disconnecting from the battery on your own
vehicle first.
X Have the battery checked at aqualified specialist workshop, e.g. aMercedes-Ben zService
Cent re. Towin
gand tow-star ting Important safet
ynotes
When towing, observe the legal requirements
in all countries concerned. G
Risk of accident
If you tow the vehicle, you must use arigid
towing bar if: R
the engin eisnot run ning.
R there is abrake system malfunction.
R there is amalfunction in the voltage supply
or the vehicle's electrical system.
The power steering and the brake forc eboos-
ter do not work when the engin eisnot run-
nin g. Yo uwill then need considerably more
forc etos teer and to brake and the brake
peda ltrave lwill be longer. If necessary,
depress the brake pedal with maximum force. 290
Towing and tow-startingBreakdown assistance
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X
To open: pull outcover :slightly at the
bottom in the direction of arrow =.
X Pull cover :outwards in the direction of
arrow ;and remove it.
X To close: clip in cover :on the front of
the dashboard.
X Fold cover :inwards until it engages. Fuse box in th
eengine compartment
X Make sure that the windscreen wiper sare
turne doff. G
Ris
kofi njury
Make sure that the windscreen wipers are
turned off and the key is pulled out of the igni-
tion lock befor eyou open the cover of the fuse
box. Otherwise, the windscreen wiper sand
the wipe rrods abov ethe cover coul dbeset
in motion .This coul dlead to you or others
being injured by the wiper rods.
X Open the bonnet (Y page 259). X
Remov eany existing moisture from the
fuse box using adry cloth.
X Take lines ;from th eguides.
X Move aside lines ;.Route the lines behind
con nection =to do this.
X To open: open clamps :.
X Remove the fuse bo xcover forwards.
X To close: checkwhether the rubber seal is
lyin gcorrectly in the cover.
X Insert the cover at the rea rofthe fuse box
int ot he retainer.
X Fold down the cover and close clamps :.
X Secur elines ;in the guides.
! The cover must be fitted properly, other-
wise moisture or dirt could impair the func-
tion of the fuses.
X Close the bonnet (Y page 260). Fuse box in the boot
X Open the boot lid. Coupé
X
To open: turn rotarycatch :clockwise.
X Open cover ;downwards. 294
FusesBreakdown assistance
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