2011 MERCEDES-BENZ E-CLASS CABRIOLET brake light

Display messages Possible causes/consequences and
M Solutions
÷
inoperative See
Owner'
sManual G
Risk of accident
ESP ®
,B AS ,PRE-SAFE ®
,t he HOLD function ,hill start assist and
ESP ®
trailer stabilisation are no tavailabled ue toamalfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
alsoh ave failed.
In addition, the äandå warning lamp slight up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above.
X Drive on carefully.
X Visi taq ualified specialist workshop. T!
÷ G
Risk of accident
EBD( electronic brake forc edistribution), ABS, ESP ®
,B AS ,PRE-
SAFE ®
,t he HOLD function ,hill start assist and ESP ®
trailer stabi-
lisatio nare not available due to amalfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
alsoh ave failed.
In addition, the ä,åand! warning lamp slight up in
the instrument cluster and awarning tone sounds.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels coul dtherefore lock if you
brake hard ,for example.
X Drive on carefully.
X Visi taq ualified specialist workshop immediately. J
Releas
eparking brake You are drivin
gwith the parkin gbrake applied. Awarning tone also
sounds.
X Release th eparking brake. 234
Display messagesOn-boar
dcomputer and displays

Display messages Possible causes/consequences and
M Solutions
J
Brake immediately Am
alfunction has occurred while th eHOLDf unction or DIS-
TRONIC PLU Sisactive.
or
Vehicles wit hmanual transmission: wit hthe HOLD function acti-
vated, you hav eeither:
R opened th edriver's doo rand released the sea tbelt or
R switched off the engin eor
R opened the bonnet
At one may also sound at regular intervals. The toneb ecomes
louder if you attempt to lock the vehicle.
You cannot start the engine.
X Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disap-
pears.
X Prevent the vehicle from rolling away before you leave it
(Y page 301).
You can restart the engine. J
Check brake fluid
level G
Risk of accident
There is insufficient brake fluid in the brake fluid reservoir. In addi-
tion, the red Jwarning lamp in the instrument cluster lights
up and awarning tone sounds.
X Pullo ver and stop the vehicl esafel yass oon as possible,p aying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Apply the parking brake.
X Consult aqualified specialist workshop.
X Do not top up the brake fluid. This does not correct the error. #
Check brake wear The brake pads/linings have reache
dtheir wearl imit.
X Visit aqualified specialist workshop. PRE-SAFE
inoperative See
Owner's Man. G
Risk of injury
Important function sofPRE-SAFE ®
have failed .All other occupant
safet ysystems, e.g. airbags, remain available.
X Visit aqualified specialist workshop immediately. Display messages
235On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
Radar sensor
deactivated autom.
See Owner'
sManual Vehicles wit
hanavigation system: th evehicl eisc lose to aradio
telescope facilit yand is therefore prohibite dfromt ransmitting any
rada rsignals .The radar sensor system has switched off automat-
ically (Y page 345).
DISTRONIC PLUS (Y page 171) is deactivated automatically if it is
activated. Awarning tone also sounds.
Blin dSpotA ssist (Y page 196) or Active Blind Spot Assist
(Y page 199) is deactivated automaticallyifitisa ctivated. The
yellow 9indicator lamps also light up in the exterior mirrors.
BAS PLUS (Brake Assist PLUS) (Y page 62) and PRE-SAFE®
Brake
(Y page 66) are also not available.
X Drive on.
Once you have moved far enough awayf rom the radio telescope,
the above functionsa re available again.Radar sensor
deactivated See
Owner's Manual The radar sensor system is deactivated.
X
Check whether or not the radar sensor system may be activated
(Y page 345).
X Switch on the radar sensor system (Y page 229).Lane Keeping
Assist currently
unavailable See
Owner's Manual or
Active Lane Keep‐ ing Assist cur‐
rently unavailable
See Owner's Manual Lane Keeping Assist or Active Lane Keeping Assist is deactivated
and temporarily inoperative if:
R the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for alonger period.
R the lane markings are worn, dark or covered, for example by dirt
or snow.
Lane Keeping Assist or Active Lane Keeping Assist is operational
againa nd the display message disappears if:
R the dirt (e.g. slush) drops away whil ethe vehicl eisinmotion.
R the system detects tha tthe camera is fully operational again.
If the displaym essage continues to be displayed:
X Cleant he windscreen. Lane Keeping
Assist inoperative
or
Active Lane Keeping Assist
inoperative Lane Keeping Assist or Active Lane Keeping Assist is faulty.
X
Visit aqualified specialist workshop. Display messages
245On-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

Drivin
gsystems Problem Possible causes/consequences and
M Solutions
·
The red distanc
ewarn-
in gl amp lights up while
th ev ehicle is in motion. G
Risk of accident
The distanc etot he vehicle in fron tistoo small for the speed
selected.
X Increase the distance. ·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
Aw
arning tone also
sounds. G
Ris
kofa ccident
The warning is issue difyou approach astationar yvehicle or a
vehicle driving ahead of you at to ohigh aspeed.
X Be prepared to brak eimmediately.
X Pay careful attention to th etraffic situation. You may have to
brak eort akee vasive action.
Mor einformatio nabout DISTRONIC PLU S(Ypage 171) and
PRE-SAFE ®
Brake (Y page 66). 262
Warning and indicator lamps in th
einstrumen tclusterOn-boar dcomputer and displays