2011 MERCEDES-BENZ E-CLASS CABRIOLET engine

Warning and indicator lamps in the instrument cluster
Seat belt
Problem Possible causes/consequencesa
ndM Solutions
7
Only for certain coun-
tries: the red sea
tbelt
warning lamp lights up
for six seconds after
the engin estarts. The seat belt warning lamp reminds the driver and fron
tpassenger
to fasten their seat belts.
X Faste nyour seat belt (Y page 46). 7
Only for certain coun-
tries: the red seat belt
warning lamp lights up
after the engine starts.
In addition,
awarning
tones ounds for up to
six seconds. G
Risk of injury
The driver's seat belt is not fastened.
X Fasten your seat belt (Y page 46).
The warning tonec eases. 7
The red seat belt warn-
ing lamp lights up after
the engine starts, as
soon as the driver's or
the front-passenger
door is closed.
G
Risk of injury
The driver or front passenger has not fastened their seat belt.
X Fasten your seat belt (Y page 46).
The warning lamp goes out. G
Risk of injury
There are object sonthe front-passenger seat.
X Remove the object sfrom the front-passenger seat and stow
them in asecure place.
The warning lamp goes out. Warning and indicator lampsint
he instrument cluster
255On-board computer and displays Z

Safety systems
Problem Possible causes/consequences and
M Solutions
J
The red brake system
warning lamp comes on
while the engine is run-
ning.
Awarning tone
also sounds. G
Risk of accident
There is insufficient brake fluid in the fluid reservoir.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Apply the parking brake.
X Consult aqualified specialist workshop immediately.
X Observe the additional display messages in the multifunction
display.
Do not top up the brake fluid. This does not correctt he error.!
The yellow ABS warning
lamp is lit while the
engine is running.
G
Risk of accident
ABS (Anti-lock Brake System) has been deactivated due to afault.
For this reason, BAS (Brake Assist), BAS PLUS, ESP ®
(Electronic
Stability Program), PRE-SAFE ®
,P RE-SAFE ®
Brake ,the HOLD func-
tion, hill start assist, the adaptive brake lights and ESP ®
trailer
stabilisation are also deactivated, for example.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
ATTENTIONA SSIST is deactivated.
X Observe the additional displaym essages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. !
The yellow ABS warning
lamp is lit while the
engine is running. A
warning tone also
sounds.
G
Risk of accident
EBD (electronic brake force distribution) is faulty. Therefore, ABS,
BAS,B AS PLUS, ESP ®
,P RE-SAFE ®
,P RE-SAFE ®
Brake, the HOLD
function, hill start assist, the adaptive brake lights and ESP ®
trailer
stabilisation, for example, are not available either.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
ATTENTIONA SSIST is deactivated.
X Observe the additional displaym essages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. Warning and indicator lampsint
he instrument cluster
257On-board computer and displays Z

Problem Possible causes/consequences and
M Solutions
Jäå!
The red brake warning
lamp, the yellowE
SP®
and ESP ®
OFF warning
lamps and the yellow
ABS warning lamp are
lit while the engine is
running. G
Risk of accident
ABS and ESP ®
are malfunctioning. Therefore, BAS,B AS PLUS,
EBD,P RE-SAFE ®
,P RE-SAFE ®
Brake, the HOLD function, hill start
assist, the adaptive brake lights and ESP ®
trailer stabilisation, for
example, are not available either due to amalfunction.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
ATTENTION ASSIST is deactivated.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. ä
The yellowE
SP®
warn-
ing lamp flashes while
the vehicle is in motion. G
Risk of accident
ESP ®
or traction control has intervened because there is arisk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
X Only depress the accelerator pedal as far as necessary when
pulling away.
X Release the accelerator pedal while the vehicle is in motion.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
.
For exceptions: (Y page 64).å
The yellow ESP
®
OFF
warning lamp is lit while
the engine is running. G
Risk of accident
ESP ®
and ESP ®
trailer stabilisation are deactivated. ESP ®
will not
stabilise the vehicle if it starts to skid or if awheel starts to spin.
X Reactivate ESP ®
.
Exceptions: (Y page 64).
X Adapt your driving style to suit the road and weather conditions.
If ESP ®
cannot be activated:
X Have ESP ®
checked at aqualified specialist workshop. 258
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
äå
The yellowE
SP®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. G
Risk of accident
ESP ®
,B AS,B AS PLUS, PRE-SAFE ®
,P RE-SAFE ®
Brake, the HOLD
function, hill start assist, the adaptive brake lights and ESP ®
trailer
stabilisation are not available due to amalfunction .ESP ®
will not
stabilise the vehicl eifitstarts to skid or if awheel starts to spin.
The brake system continues to function normally, but without the
functions listed above.
ATTENTIONA SSIST is deactivated.
X Observe the additional displaym essages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. J
The red brake system
warning lamp comes on
while the vehicle is
moving.
Awarning tone
also sounds. You are driving with the parking brake applied.
X
Release the parking brake.
The warning lamp goes out and the warning tone ceases. 6
The red SRS warning
lamp is lit while the
engine is running.
G
Risk of injury
The restraint systems are malfunctioning. The airbags or belt ten-
sioners may either be triggered unintentionally or, in the event of
an accident, not be triggered at all.
X Drive on carefully.
X Visit aqualified specialist workshop immediately. Warning and indicator lampsint
he instrument cluster
259On-board computer and displays Z

Engine
Problem Possible causes/consequences and
M Solutions
;
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 ginemergenc ymode.
X Hav ethe vehicle checked as soon as possible at aqualified
specialist workshop. Vehicle
swithad ieseleng ine: th efuel tan khas been run dry
(Y page 164).
X Start th eenginet hree to four times after refuelling.
If th eyellow engin ediagnostics warning lamp goes out ,emer-
gency runnin gmodeisc ancelled. The vehicle need no tbe
checked. 8
The yellow reserve fuel
warning lamp lights up
whil
ethe engine is run-
ning. The fue
llev el ha sdroppe dinto the reserve range.
Operation of the auxiliary heating is deactivated when the fue llev el
drops into the reserve range.
X Refue latthe nearest filling station. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gaug
eisatthe
star toft he scale. The temperature sensor for the coolant temperature gauge 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
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine. Do not continue driving
under any circumstances.
X Apply the parking brake.
X Consult aqualified specialist workshop. 260
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
?
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 engine radiator
may be blocked or the electric engine radiator fan may be mal-
functioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 283).
Observe the warning notes as you do so.
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 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 traffic. ?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
Awarning tone
also sounds. The coolant temperature has exceeded 120 †. The airflow to the
engine radiator may be blocked or the coolant level may be too
low.
The engine is not being cooled sufficiently and may be damaged.
X
Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 283).
Observe the warning notes as you do so.
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 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 traffic. Warning and indicator lampsint
he instrument cluster
261On-board computer and displays Z

X
To open: slidecover :forwards unti lit
engages.
X To remove the insert: holdinsert =by
the ribbing at the side sand lift it up ;and
out.
X To refi tthe insert: press insert =into the
holder until it engages.
X To close: press cover :briefly at the
front.
The cover moves back.
Ashtray in the rear-compartment centre
console X
To open: pullcover ;out by its top edge.
X To remove the insert: press release but-
ton =and lift the insert up and out.
X To fit the insert: fit insert:from above
into the holder and press dow ninto the
holde runtil it engages. Cigarette lighter
G
WARNING
Onl yholdt he hot cigarette lighte rbyitsknob.
Otherwise ,you might burn yourself.
Mak esuret hatc hildren travellin ginthevehi-
cle are no table to injure themselves on the
hot cigarette lighter or cause afire with it. X
Turn the key to position 2in the ignition
lock.
X To open: slide cover :forwards until it
engages.
X Press in cigarette lighter ;.
Cigarett elighter ;will pop out automati-
cally when the heating element is red-hot.
X To close: press cover :briefly at the
front.
The cover moves back. 12
Vsockets
Point stoo bserve befor euse The socket
scan be used for accessories ,e.g.
lamps or mobile phon echargers with amax-
imum curren tdraw of 18 0W(15 A).
If you use th esocket sfor lon gperiods when
th ee ngine is switche doff,t he battery may
discharge.
X Turn the key to position 1in the ignition
lock.
i An emergency cut-offe nsures thatthe on-
board voltage does not drop too low. If the
on-board voltage is too low, the power to
the socketsisa utomatically cut. This
ensures that there is sufficient power to
start the engine. 272
FeaturesStowing and features

Useful information
............................280
Engine compartment ........................280
Maintenance ...................................... 284
Care .................................................... 285 279Maintenance and care