engine MERCEDES-BENZ E-CLASS CABRIOLET 2011 Service Manual

Problems with the engine
Problem Possible causes/consequences and
M Solutions
The engine does not
start. The HOLD function or DISTRONIC PLUS is activated.
X
Deactivat ethe HOLD function (Y page 184) or DISTRONIC
PLUS (Y page 171).
X Try to start the engine again. The engine does not
start. The starter motor
can be heard. R
There is amalfunction in the engine electronics.
R There is amalfunction in the fuel supply.
X Before attempting to start the engine again, turn the key in the
ignition back to position 0or press the Start/Stop button
repeatedly until all indicator lamps in the instrumen tcluster go
out.
X Try to start the engine again (Y page 148). Avoid excessively
long and frequent attempt stostart the engine, as this will drain
the battery.
If the engine does not start after several attempts:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Servic eCentre. The engine does not
start
.The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge displays hows0. The fuel tank is empty.
X
Refuel the vehicle. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (Y page 309).
If the engine does not start despite attemptstoj ump-start it:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Service Centre. The starter motor was exposed to
athermal load that was too high.
X Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Service Centre. 152
DrivingDriving and parking

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 in amechanical
componentoft he engine management system.
X Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at aqualified specialist
workshop, e.g. aMercedes-Benz Service Centre.
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. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 283). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
At coolant temperatures under 120 †, drive on to the nearest
qualified specialist workshop, e.g. to aMercedes-Benz Service
Centre.
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
!
Only engage gear when the clutch pedal
is depressed.
! When shifting between 5thand 6thgear,
you should always push the gear lever all the way to the right. Otherwise, you could
shift unintentionally into
3rdor4th gear
and damage the transmission.
If you shift down at too high aspeed (trans-
mission braking), this can cause the engine
to overrev, leading to engine damage.
Do not use the clutch bite point to keep the
vehicle stationary on uphill gradients.
There is otherwise arisk of damaging the
clutch.
! On long and steep downhill gradients,
especially if the vehicle is laden or towing
at railer, you must shift into gear 1, 2or3
in good time. This uses the engine's braking
effect.T his relieves the load on the brake
system and prevents the brakes from over-
heating and wearing too quickly. Manual transmission
153Driving and parking Z

Neutral
NwithE CO start/sto pfunc-
tio na ctivated
In neutral N,the engine is switched off if the
vehicl espeed is belo wacertainthreshold and
the clutch pedal is not depressed.
For further information on the ECO start/stop
function, see (Y page 150). Engaging reverse gear
! Only shift into reverse gear Rwhen the
vehicle is stationary. Otherwise, you could
damage the transmission.
i The ECO start/stop function is not avail-
able when reverse gear is engaged.
For further information on the ECO start/
stop function, see (Y page 150).
X Move the gear lever firmly to the left
beyond the point of resistance and then
forwards. Shift recommendation
The gearshift recommendations assist you in
adopting an economical driving style. The rec-
ommended gear is shown in the multifunction
display. X
Shift gear according to gearshift recom-
mendation :shown in the multifunction
displayoft he instrumentc luster. Automatic transmission
Important safety notes
G
WARNING
The movemen tofthe pedals must not be
impaired in any way.Don ot keep any objects
in the driver's footwell. Make sure that floor-
mats or carpets are correctly secured and
that there is sufficient clearance for the ped-
als.
Do not place several floormats on top of one
another. G
WARNING
Do not change down for additional engine
braking on aslippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. This could cause you
to lose control of your vehicle and cause an
accident. Selector lever
Overview of transmission positions Selector lever
P
Park position with selector lever lock
R Reverse gear
N Neutral
D Drive 154
Automatic transmissionDriving and parking

X
Press program selector button :repeat-
edly until the letter for the desired gearshift
program appears in the multifunction dis-
play.
i The automatic transmission switches to
automatic drive program Eeach time the
engine is started. Steering wheel gearshift paddles
:
Left-hand steerin gwheel gearshift paddle
; Right-hand steerin gwheel gearshift pad-
dle
In the automatic drive program, you can
restrict or derestrict the shift range by using
the steerin gwheel gearshift paddles or the
selector lever (Y page 157).
In the manual drive program, you can change
gear using the steerin gwheel gearshift pad-
dles or the selector lever (Y page 158).
i You can only change gear with the steer-
ing wheel gearshift paddles when the trans-
mission is in position D.Automatic drive program
Drive program Eis characterised by the fol-
lowing:
R comfort-oriented engine settings.
R optimal fuel consumption resulting from
the automatic transmission shiftin gup
sooner. R
the vehicle pulling away more gently in
forward and reverse gears, unless the
accelerator pedal is depressed fully.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
R the automatic transmission shiftin gup
sooner. This results in the vehicle being
driven at lower engine speeds and the
wheels being less likely to spin.
Drive program Sis characterised by the fol-
lowing:
R sporty engine settings
R the vehicle pulling away in first gear
R the automatic transmission shiftin gup
later
R as aresult of the later automatic transmis-
sion shift points, the fuel consumption pos-
sibly being higher Shift ranges
Introduction When the automatic transmission is in posi-
tion
D,itisp ossible to restrict or derestrict
the shift range (Y page 157).
The shift range selected is shown in the mul-
tifunction display. The automatic transmis-
sion shifts only as far as the selected gear. Driving situations
=
To use the engine's braking effect.
5
To use the braking effect of the
engine on downhill gradients and
for driving:
R
on steep mountain roads
R in mountainous terrain
R in arduous conditions 4
To use the braking effect of the
engine on extremely steep downhill
gradients and on long downhill
stretches Automatic transmission
157Driving and parking Z

Restricting the shift range
X
Press the selector lever to the left towards
D–.
or
X Pull the left-hand steering wheel gearshift
paddle.
The automatic transmissio nshifts down
one gear and restrictst he shift range to the
relevant gear.
i If the engine exceeds the maximum
engine speed when shifting down, the auto-
matic transmission protectsa gainst engine
damage by not shifting down.
i If the maximum engine speed for the shift
range is reached and you continue to accel-
erate, the automatic transmission shifts up
in order to prevent the engine from over-
revving, even if the shift range is restricted.
Derestricting the shift range X
Briefly press the selector lever to the right
towards D+.
or
X Pull the right-hand steering wheel gearshift
paddle.
The shift range is derestricted.
Clearing the shift range restriction X
Press and hold the selector lever towards
D+ until Dis shown once more in the mul-
tifunction display.
or
X Pull and hold the right-hand steering wheel
gearshift paddle until Dis shown again in
the multifunction display.
The automatic transmission shifts from the
current shift range directly to D.
Selecting the ideal shift range X
Press the selector lever to the left towards
D– and hold it in position. or
X
Pull the left-hand steering wheel gearshift
paddle and hold it in position.
The automatic transmission shifts to the
gear which allowso ptimum acceleration
and deceleration. To do this, the automatic
transmission shifts down one or more
gears. Manual drive program
Switching on the manuald rive program Manual drive program
Mcan be selected
using the program selector button. You can
change gears using the steering wheel gear-
shift paddlesort he selector lever in manual
drive program Mif the transmission is in posi-
tion D.The gear selected is shown in the mul-
tifunction display.
X Press the program selector button
(Y page 156) repeatedly until Mappears in
the multifunction display.
Upshifting X
Briefly press the selector lever to the right
towards D+.
or
X Pull the right-hand steering wheel gearshift
paddle (Y page 157).
The automatic transmission shifts up to the
next gear.
Downshifting X
Briefly press the selector lever to the left
towards D–.
or
X Pull the left-hand steering wheel gearshift
paddle (Y page 157).
The automatic transmission shifts down to
the next gear.
i If you desire maximum acceleration, push
the selector lever to the left or pull and hold 158
Automatic transmissionDriving and parking

Problems with the transmission
Problem Possible causes/consequences and
M Solutions
The transmission has
problems shifting gear. The transmission is losing oil.
X
Have the transmission checked at aqualified specialist work-
shop, e.g. aMercedes-Benz Service Centre, immediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop the vehicle.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least 10 seconds before restarting the engine.
X Shift the transmission to position Dor R.
If D is selected, the transmission shifts into secondgear; ifRis
selected, the transmission shifts into reverse gear.
X Have the transmission checked at aqualified specialist work-
shop, e.g. aMercedes-Benz Service Centre, immediately. Releasing the parking lock manually
In the event of an electrical fault, it is possible
to release the selector lever lock manually to
move it out of position P,e.g. if you wish to
tow the vehicle away. !
Do not use any sharp-edged objectstol ift
up the selector lever cover in the centre
console. Otherwise, the selector lever
cover could be damaged.
X Engage the parking brake.
X Prise out selector lever gaiter :with aflat,
blunt object,( e.g.ascrewdriver wrappe dincloth
)from the right-hand edge, pulling it
up and out.
X Press release button ;dow nand simul-
taneousl ymovet he selecto rlever out of
position P.
The selector lever can now be moved freely
until it is returned to position P. Refuelling
Important safet
ynotes G
WARNING
Fuel is highly flammable. Fire, naked flames
and smoking are therefore prohibited when
handling fuels.
Switc hoff the engin eand the auxiliary heating
before refuelling. G
WARNING
Do not come into contact with fuels.
It is hazardous to your health if your skin
comes into direct contact with fuels or you
breathe in fuel vapours. 160
RefuellingDriving and parking

G
WARNING
Do not use petrol to refue lvehicles with adie-
sel engine. Do not mix diesel with petrol. This
would result in damage to the fuel system and
engine, which coul dleadtoav ehiclefire.
! Do not use petrol to refue lvehicles with a
diesel engine. Do not use diesel to refuel
vehicles with apetrol engine. Even small
amounts of the wrong fuel result in damage
to the fuel system and the engine.
! Do not switch on the ignitio nifyou acci-
dentally refue lwith the wrong fuel .Other-
wise ,the fuel will ente rthe fuel lines. Notify
aq ualified specialist workshop and have
the fuel tank and fuel lines drained com-
pletely. Petrol (EN 228, DIN 51626)
Fuel grade !
Only refuel using unleaded premium-
grade petrol with at least
95 RON/85 MON, which conforms to Euro-
pean standard EN 228 or an equivalent
specification.
! Do not use the following:
R E85 (petrol with 85% ethanol)
R E100 (100% ethanol)
R M15 (petrol with 15% methanol)
R M85 (petrol with 85% methanol)
R M100 (100% methanol)
R Diesel
Do not mix these fuels with petrol, and do
not use any additives. Otherwise, this can
lead to damage to the engine. This does not
include additives for the removal and pre-
vention of residue build-up. Only additives
recommended by Mercedes-Ben zmay be
added to petrol. Mor einformatio nabout
recommended additives can be obtained
from any Mercedes-Benz Service Centre. !
Use afilter when adding fuel from afuel
can. The fuel lines and/or the diesel injec-
tion system could otherwise be blocked by
particles from the fuel can.
i If the recommended fuel is not available,
but only as atemporary measure, you may
also use regular unleaded petrol,
91 RON/82.5 MON. This may reduce
engin eperformanc eand increase fuel con-
sumption .Avoid driving at full throttle.
In some countries, the fuel grad eavailable
may not be adequate and coul dcause
deposits to build up. In such cases, and in
consultation with aMercedes-Benz Service
Centre, the petrol may be mixed with the
additive recommende dbyMercedes-Benz
(part number A000989254510). You must
observe the notes and mixing ratios speci-
fied on the container.
For further information on "Fuel", see
(Y page3 34).
E3 00 BlueEFFICIENCY and E350 Blue-
EFFICIENCY !
Only refue lusing unleaded, sulphur-free
premium-grade petrol with at least
95 RON/85 MON, which conforms to Euro-
peans tandard EN 228 or an equivalent
specification.
You can otherwise impair engine outpu tor
damage the emission contro lsystem.
i In some countries, the available petrol
may not be sufficiently low in sulphur. This
fuel can temporarily produce unpleasant
odours, especially on short journeys. As
soon as sulphur-free fuel (sulphur content
<10p pm) is used for refuelling, the odours
are reduced. Refuelling
161Driving and parking Z

Diesel (EN 590)
Fuel grade !
Whe nrefuelling, only use diesel fuel that
conforms to the European standard EN 590
or is of equivalent quality. You can other-
wise impair engin eoutput or damage the
engine.
! Vehicles with diesel particle filters: in
countries outside the EU, only use low sul-
phur Euro diesel with asulphur contentof
under 50 ppm .Otherwise, the emission
control syste mcould be damaged.
! Vehicles without adiesel particle fil-
ter: in countries where only diesel fuels
with ahigher sulphur conten tare available,
the vehicle's oil change interval sare
shorter. More information about intervals
for changing the oil can be obtained from
any Mercedes-Benz Service Centre.
! Only use fuel that complies with the EN
590 European standard .Fuel that does not
comply wit hEN590can lead to increased
wear, engin edamag eand damag etothe
exhaust system.
Do not use the following:
R marine diesel
R heating oil
R bio-diesel
R vegetable oil
R petrol
R paraffin
R kerosene
Do not mix these fuels with diesel fuels and
do not use any special additives. Other-
wise, this can lead to damage to the engine.
This excludes flow improver; see "Low out-
side temperatures".
! Use afilter when adding fuel from afuel
can. Otherwise, the fuel lines and/or the
diesel injection system could be blocked by
particles from the fuel can. For further information on "Fuel", see
(Y
page 334).
Low outside temperatures Diesel fuel with improved cold flow qualities
is available during the winter months. In
Europe, various climate-dependent low-tem-
perature classes are defined in EN 590. Refu-
elling with diesel fuel which complies with the
climatic specification sofstandard EN 590
can help to prevent operating problems. At
exceptionally low temperatures, it is possible
that the flow properties of the fuel may be
inadequate. This also applies to fuel that has
not been adapted to suit the climatic condi-
tions, e.g. diesel fuel from warmer regions.
i Further information about country-spe-
cific fuel properties can be obtained from
oil companies, e.g. at filling stations.
Flow improver Flow improvers can be added to improve the
cold resistanc
eofdiesel fuel. The effective-
ness of aflow improver is not guaranteed with
every fuel.
Correct dosage and thorough mixing are deci-
sive factor sinensuring improvement in low-
temperature resistance. Under certain cir-
cumstances, an excessive dosage may
actually decrease low-temperature resist-
ance and should therefor ebeavoided. Follow
the manufacturer's dosing instructions.
Mix the additive with the diesel in good time,
before the flow properties of the diesel
become inadequate. Malfunction scan other-
wise only be rectified by heating the entire
fuel system, e.g. by parking the vehicle in a
heated garage.
Observe the information provided by the man-
ufacturer when using aflow improver. Only
use flow improvers that have been tested and
approved by Mercedes-Benz. You can obtain
further information from any Mercedes-Benz
Servic eCentre. 162
RefuellingDriving and parking

Refuelling
Fue lfille rflap The fuel filler flap is unlocked or locked auto-
matically when you open or close the vehicle
with the key or using KEYLESS-GO.
The position of the fuel filler cap is displayed
in the instrumen tcluster 8.T he arrow
next to the filling pump indicates the side of
the vehicle. Example: Coupé
:
To open the fuel filler flap
; To insert the fuel filler cap
= Tyre pressure table
? Fuel type
Opening X
Switch off the engine.
X Remove the key from the ignition lock.
KEYLESS-GO: open the driver's door. This
switches the ignition to position 0,which
corresponds to having removed the key.
The driver's door can be closed again.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.
X Open the fuel filler flap.
X Turn the fuel filler cap anti-clockwise and
remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap ;.X
Completely insert the pump nozzle into the
filler neck and refuel.
X Only fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damage the
fuel system.
Closing X
Replace the fuel filler cap and turn it clock-
wise. The fuel filler cap audibly engages.
X Close the fuel filler flap.
i Close the fuel filler flap before locking the
vehicle. Alockingp in otherwise prevents
the fuel filler flap from closing after the
vehicle has been locked. Refuelling
163Driving and parking Z

Problems with the fuel and fuel tank
Problem Possible causes/consequences and
M Solutions
Fuel is leaking from the
vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is faulty.
X Turn the key to position 0(Y page 147) in the ignition lock
immediately and remove it.
X Do not restart the engine under any circumstances.
X Consult aqualified specialist workshop. The engine does not
start. The fuel tank of
avehicle with adiesel engine has been run com-
pletely dry.
X Refuel the vehicle with at least five litres of diesel.
X Turn the ignition on for at least 10 seconds (Y page 147).
X Start the engine continuously for up to 10 seconds until it runs
smoothly.
or
X Start the engine via the touch-start function. To do this, turn the
key to position 3(Ypage 147) in the ignition lock and then
release it immediately.
If the engine does not start:
X Turn the ignition on again for approximately 10 seconds
(Y page 147).
X Start the engine again continuously for up to 10 seconds until
it runs smoothly.
or
X Start the engine again via the touch-start function.
If the engine does not start after three attempts:
X Consult aqualified specialist workshop. 164
RefuellingDriving and parking