2010 MERCEDES-BENZ E-CLASS CABRIOLET coolant level

Problem Possible causes/consequences and
M Solutions
Vehicles with
apetrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is
amalfunction in the engine electronics or amechanical
componen tofthe engin emanagement system.
X Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at aqualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be lit and a
warning tone may
sound. (Y
page 192). The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soo naspossible and allow the engin eand the coolant
to cool down.
X Check the coolant level (Y page261). Observe the warning
notes as you do so and top up the coolan tifnecessary. If the coolan
tlevel is correc t,the radiator fan may be faulty. The
coolant is too hot and the engine is no longe rbeing cooled suffi-
cien tly.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop/start driving. Manual transmission
Gear lever
Gear lever
!
Whe nshifting between 5thand 6thgear,
you should always push the gear lever all
the way to the right. Otherwise, you could
shift uninte ntionally into 3rdor4th gear
and damage the transmission. Do not exceed the maximum speed for the
individual gears.
Shiftin
gdown at too high aspeed (trans-
mission braking) can cause the engine to
overrev ,leading to engine damage.
! On long and steep downhill gradients,
especiall yifthe vehicle is laden or towing
at railer, yo umust shift into gear 1, 2or3
in good time. This uses the engine's braking
effect .This relieves the load on the brake
system and prevents the brakes from over-
heating and wearing too quickly. Neutral
Nwhen the ECO start/stop
functio nisactive
In neutral N,the engin eisswitched off when
the vehicle speed is below acertain threshold
and the clut chpedal is not depressed. Manual transmission
141Driving and parking
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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. Important safet
ynotes
You will find an illustration of the instrument
cluster in the "At aglance" section
(Y page 24). G
Risk of accident
Only use the on-board computer when road
and traf ficc ondition spermit .You would oth-
erwise be distracted and unable to concen-
trate properly on driving, and coul dcause an
accident. G
Risk of accident
If the instrument cluster or multifunc tion dis-
play fails, no messages can be displayed.
This means that you will not see information
about the driving situation ,such as the speed,
outside temperature, warning/indicator
lamps, display message sorsystem failures.
Handling characteristics may be affected.
Adapt your driving style and speed accord-
ingly.
Immediately consult aqualified specialist
workshop which has the necessary specialist
knowledg eand tool stocarry out the work
required. Mercedes-Benz recommends that
you use aMercedes-Benz Servic eCentr efor
this purpose. In particular ,work relevant to
safet yorons afety-related systems must be
carried out at aqualified specialist workshop. G
Risk of accident
The on-board computer only records and dis-
plays malfunctions and warnings from certain
systems. For this reason, you should always make sure that your vehicle is safe to use. You
could otherwis
ecause an accident by driving
an unsafe vehicle. G
Risk of accident and injury
The operating safety of your vehicle could be
jeopardise difmaintenance work is carried
out incorrectly. As aresult, you could lose
control of the vehicle and cause an accident.
In addition ,the safety system smay no longer
be able to protec tyou or other sasthey are
designe dtodo.
Always have maintenanc ework carried out at
aq ualified specialist workshop .The qualified
specialist workshop must hav ethe necessary
specialist knowledge and tools to carry out
the wor krequired. Mercedes-Benz recom-
mends that you use aMercedes-Benz Service
Centr efor this purpose. In particular ,work
relevant to safet yoronsafety-related sys-
tems must be carried out at aqualified spe-
cialist workshop. Displays and operation
Coolant temperature gauge
The coolant temperature gauge is in the
instrument cluster on the right-hand side.
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 120 †.
The coolant temperature may rise to the top
end of the scale at high outsid etemperatures
and on long uphill stretches. Rev counter
The red band in the rev coun terindicate sthe
engine' soverrevving range.
! Do not drive in th eoverrevving range.
Doing so wil ldamage the engine.
The fuel supply is interrupted to protec tthe
engin ewhen the red band is reached. 192
Displays and operationOn-boar
dcompu tera nd displays
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Displa
ymessages Possible causes/consequences and
M Solutions
? The fan motor is faulty.
X
If th ecoolant tem perature is less than 12 0†,you can
continue drivin gtothe nearest qual ified specialist work-
shop.
X Avoid subjecting th eenginetoh eavy loads, e.g. driving in
mountainous terrain, and stop-star tdriving. # Th
eb attery is not being charged.
Aw arning ton ealso sounds.
Possible causes are:
R af ault yalternator
R at orn poly-V-belt
R am alfunction in the elect ronics
X Pul lover and stop the vehicle safel yand switch off the
engine ,payin gattentio ntoroad and traffic conditions.
X Open the bonnet.
X Check whether the poly-V-belt is tor n.
If the poly-V -belt is torn:
! do not continue driving. The engine could otherwise over-
heat.
X Consult aqualified specialist workshop.
If the poly-V-belt is OK:
X Visit aqualified specialist workshop. 4 Check
eng. oil
lev. when
next refu‐
elling The engine oil level has dropped to
acriticallevel.
Aw arning ton ealso sounds.
X Chec kthe oil level (Y page 260).
X If necessary, top up the engin eoil (Y page 261).
X Hav ethe engin echecked for leak sifthe engin eoil needs
topping up more often than usual. C There is only
asmall amount of fue linthe fuel tan k.
X Refuel at the nearest filling station. 8 Reserve
fue
llevel Th
ef uel 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. Display messages
223On-board computer and displays
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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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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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X
If necessary ,top up with coolant which has
been tested and approved by Mercedes-
Benz.
X Replace cap :and tur nitclockwise as far
as it wil lgo.
For further information on coolant, see
(Y page 317).
Windscreen washer system/headlamp
cleaning system The washer fluid reservoir is used for both the
windscreen washer system and the headlamp
cleaning system. G
Risk of fire
Windscreen washe rfluid is highly flam mable.
Fir e, naked flam es and smoking are prohibi-
ted when handlin gwasher fluid concentrate.
! Only use washe rfluid concentrate which
is suitable for plastic lamp lenses. Unsuit-
able washer fluid concentrate could dam-
age the plastic lamp lenses of the head-
lamps.
! Do not used distilled or de-ionised water
in the washer fluid container. Otherwise,
the fluid level measurin ggauge could be
damaged.
i Add windscreen washe rconcentrate, e.g.
MB Sum merFit, to th ewasher fluid all year
round. Washer fluid reservoir (example) X
Mix the windscreen washe rfluid in acon-
tainer beforehand.
X At temperatures above freezing: fillt he
washer fluid reservoi rwith am ix of water
and windsc reen washer concentrate (e.g.
MB Sum merFit).
X At temperatures belo wfreezing: fill the
washer fluid reservoir with amix of water,
antifreeze additiv eand windscreen washer
concentrate, e.g. MB WinterFit. Adapt the
mixing ratio to the outside temperatures.
X To open: pull cap:upward sbythe tab.
X Top up with the pre mixed washer fluid.
X To close: presscap : ontothe filler neck
until it engages. Service
ASSYST PLUS service interval display
Service messages Informa
tion on the type of service and service
intervals (see separat eServic eBooklet).
You can obtain further information fr om a
Mercedes-Ben zServic eCentre.
The ASSYS TPLUS service interva ldisplay
inform syou of the nex tservice due date.
If as ervic edue date has been exceeded, you
also hear an acoustic signal.
The multifunction display shows aservice
message for afew seconds, e.g.
Next servic eAin..km
Service Adue
Service Aoverdue by .. km
Th eletter indicates which servic eisdue.A
stands for aminor servic eand Bfor am ajor
service. Anumber or another letter may be
displayed after the letter. This figure indicates
any necessary additional maintenanc ework
to be performed.
If you repor tthis displayed information to a
qualified specialist workshop, for example a
Mercedes-Ben zService Cent re,they can
infor myou of the cost sthe service will incur. 262
ServiceMaintenance and care
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numb
er (VIN) is also stamped onto th evehicle
body.
It is located on the floor in front of the right-
hand front seat. X
Slide the right-hand front seat to its rear-
most position.
X Slightl yraise front floor covering =and
fold floor covering flap :upwards.
You will see vehicle identification number
(VIN) ;. Engine number
The engine number is stamped on the crank-
case. More information can be obtained from
any Mercedes-Benz Service Centre. Servic
eproducts and capacities Important safety notes
Service products include the following:
R fuels (e.g. petrol, diesel)
R lubricants (e.g. engine oil, transmission oil)
R coolant
R brake fluid
R windscreen wash erfluid Mercedes-Ben
zrecom mends that you use
product swhich hav ebeen tested and spe-
ciall yapproved by Mercedes-Ben zfor your
vehicle and ar elisted in this Mercedes-Benz
Owner' sManual in the relevant section as:
R parts and service products are matched.
R damage caused by the use of non-approved
service products is not covered by the
implied warranty
You can recognise service products approved
by Mercedes-Benz by the following inscrip-
tion on the containers:
R MB-Freigabe (e.g. MB-Freigabe 229 .51)
R MB Approval (e.g. MB Approval 229.51)
Othe rdesignations or recommendations that
relate to alevel of quality or aspecification in
accordan cewith an MB Sheet number (such
as MB 229 .5)h ave not necessarily been
approved by Mercedes-Benz.
You can obtain further information from any
Mercedes-Benz Servic eCentre. G
Risk of inju
ry
When handling, storin gand disposing of any
service products, please observe the relevant
regulations ,asyou coul dotherwis eendanger
yourself and others.
Keep service products away from children.
To protect your health, do not allo wservice
products to com einto contact with your eyes
or ope nwounds. See adoctor immediately if
any service product is swallowed. H
Environmental note
Dispose of service products in an environ-
men tally-responsible manner. Fuel
Important safety notes G
Risk of explosion
Fuel is highly flammable. Fire, naked flames
and smokin gare therefore prohibited when
handling fuels. Servic
eprodu cts and capacities
313Technical data
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