warning lights MERCEDES-BENZ CLA 2013 Owner's Guide

Activating/deactivating the Speed Limit
Assist message functionXPress the = or ; button on the steer-
ing wheel to select the Assist menu.XPress the 9 or : button to select
Speed Lim. Assist .XPress the a button.
The multifunction display shows Speed
Limit Assist.XPress the : button.
The current selection is displayed.XTo activate or deactivate: press a.
If the Speed Limit Assist message function
is activated, a detected speed limit is auto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
When Speed Limit Assist is operational and
the message function is activated, the assis-
tance graphic shows the Ä symbol.
Deactivating/activating ESP ®
For further information about ESP
®
, see
( Y page 68).
XStart the engine.XPress the = or ; button on the steer-
ing wheel to select the Assist menu.XPress the 9 or : button to select
ESP .XPress the a button.XTo deactivate: press a again.
The å warning lamp in the instrument
cluster lights up.XTo activate: press a again.
The å warning lamp in the instrument
cluster goes out.Activating/deactivating the distance
warning functionXPress the = or ; button on the steer-
ing wheel to select the Assist menu.XPress 9 or : to select Distance
warning .XPress the a button.
The current selection is displayed.XTo activate/deactivate: press the a
button again.
When the distance warning function is
deactivated, the æ symbol appears in
the multifunction display in the assistance
graphics display.
Further information on the distance warning
function ( Y page 65).
Activating/deactivating COLLISION
PREVENTION ASSIST PLUS
XPress the = or ; button on the steer-
ing wheel to select the Assist menu.XPress the 9 or : button to select
Collision Prevent. Assist .XPress the a button.
The current selection is displayed.XTo activate/deactivate: press the a
button again.
When COLLISION PREVENTION ASSIST
PLUS is deactivated, the æ symbol
appears in the multifunction display in the
assistance graphics display.
For further information about COLLISION
PREVENTION ASSIST PLUS, see (Y page 67).
Activating/deactivating ATTENTION
ASSIST
XPress the = or ; button on the steer-
ing wheel to select the Assist menu.XPress 9 or : to select Attention
Assist .218Menus and submenusOn-board computer and displays

XPress a to confirm.
You will see the selected setting.XPress a to confirm.XPress the : or 9 button to select A,
B or Change C .XPress a to confirm.
You can now change the departure time.XPress the = or ; button to select the
display to be changed: hours, minutes.XPress the : or 9 button to set the
selected display.XPress the a button to store the entry.
The yellow indicator lamp on the auxiliary
heating button lights up.
Selecting the departure time or deactivat-
ing a selected departure time
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Heating submenu.XPress a to confirm.
You will see the selected setting.XPress a to confirm.XPress : or 9 to select one of the
three departure times or Timer off (no
timer active).XPress a to confirm.
If a departure time is selected, the yellow
indicator lamp lights up on the auxiliary
heating button.
Changing the departure time
Only vehicles with auxiliary heating
( Y page 136) have this function.
In the Heating submenu, you can select a
stored departure time or change a departure
time.
The auxiliary heating timer function calcu-
lates the switch-on time according to the out-
side temperature so that the vehicle is pre-
heated by the departure time. When the
departure time is reached, the auxiliary heat-
ing continues to heat for a further five
minutes and then switches off. The auxiliary
heating adopts the THERMATIC or
THERMOTRONIC temperature setting.
You can switch off the auxiliary heating by
using the remote control or the auxiliary heat-
ing button on the centre console.GDANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes can enter the vehicle, especially car-
bon monoxide. This is the case, e.g. in
enclosed spaces, or if the vehicle is stuck in
snow. There is a risk of fatal injuries.
You should switch off the auxiliary heating in
enclosed spaces which do not have an extrac-
tion system, e.g. a garage. If the vehicle is
stuck in snow and you must leave the auxiliary
heating running, keep the exhaust pipe and
the area around the vehicle clear of snow. To
guarantee a sufficient supply of fresh air, open
a window on the side of the vehicle away from
the wind.
GWARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot.
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system for extended
periods. There is a risk of fire.
When the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle compo-
nents.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for a longer
distance.
i Switch the auxiliary heating on regularly
once a month for about ten minutes.
224Menus and submenusOn-board computer and displays

Safety systemsDisplay messagesPossible causes/consequences and M Solutions!÷
currently unavail‐
able See Owner's
ManualABS (Anti-lock Braking System), ESP ®
(Electronic Stability Pro-
gram), BAS (Brake Assist), PRE-SAFE ®
, the HOLD function, hill
start assist and ESP ®
trailer stabilisation are temporarily unavail-
able.
The adaptive brake lights and COLLISION PREVENTION ASSIST/
COLLISION PREVENTION ASSIST PLUS may also have failed.
In addition, the ÷, å and ! warning lamps light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R self-diagnosis is not yet complete.
R the on-board voltage may be insufficient.GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
XCarefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.!÷
inoperative See
Owner's ManualABS, ESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist
and ESP ®
trailer stabilisation are unavailable due to a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST/
COLLISION PREVENTION ASSIST PLUS may also have failed.
In addition, the J, ÷ , å and ! warning lamps light
up in the instrument cluster.
ATTENTION ASSIST is deactivated.GWARNINGDisplay messages227On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsThe brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.XDrive on carefully.XVisit a qualified specialist workshop immediately.÷
currently unavail‐
able See Owner's
ManualESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist and
ESP ®
trailer stabilisation are temporarily unavailable.
The adaptive brake lights and COLLISION PREVENTION ASSIST/
COLLISION PREVENTION ASSIST PLUS may also have failed.
In addition, the ÷ and å warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function, for example, may not be complete.GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
XCarefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.228Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions÷
inoperative See
Owner's ManualESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist and
ESP ®
trailer stabilisation are not available due to a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST/
COLLISION PREVENTION ASSIST PLUS may also have failed.
In addition, the ÷ and å warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
XDrive on carefully.XVisit a qualified specialist workshop.T !
÷
inoperative See
Owner's ManualEBD (electronic brake force distribution), ABS, ESP ®
, BAS, PRE-
SAFE ®
, the HOLD function, hill start assist and ESP ®
trailer stabi-
lisation are unavailable due to a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST/
COLLISION PREVENTION ASSIST PLUS may also have failed.
In addition, the ÷, å and ! warning lamps light up in
the instrument cluster and a warning tone sounds.
ATTENTION ASSIST is deactivated.GWARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock, for example, if you brake hard.
The steerability and braking characteristics may be severely affec-
ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
XDrive on carefully.XVisit a qualified specialist workshop immediately.Display messages229On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions!
Release parking
brakeThe red ! indicator lamp flashes and a warning tone sounds.
A condition for automatic release of the electric parking brake is
not fulfilled ( Y page 163).
You are driving with the electric parking brake applied.XRelease the electric parking brake manually.The red ! indicator lamp flashes and a warning tone sounds.
You are making an emergency stop using the electric parking
brake ( Y page 163).!
Parking brake See
Owner's ManualThe yellow ! warning lamp lights up.
The electric parking brake is malfunctioning.
To apply:XSwitch the ignition off.XPress the electric parking brake handle for at least ten seconds.XMove the transmission selector lever to P.XConsult a qualified specialist workshop.The yellow ! warning lamp and the red ! indicator lamp
are lit.
The electric parking brake is malfunctioning.
To release:XSwitch off the ignition and turn it back on.XRelease the electric parking brake manually.
or
XRelease the electric parking brake automatically ( Y page 163).
If the electric parking brake still cannot be released:
XDo not drive on.XConsult a qualified specialist workshop.230Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsThe red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
The electric parking brake is malfunctioning.
To release:XSwitch off the ignition and turn it back on.XRelease the electric parking brake manually.
To apply:
XSwitch off the ignition and turn it back on.XApply the electric parking brake manually.
If the red ! indicator lamp continues to flash:
XDo not drive on.XSecure the vehicle against rolling away ( Y page 326).XMove the transmission selector lever to P.XTurn the front wheels towards the kerb.XConsult a qualified specialist workshop.The yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning.XSwitch off the ignition and turn it back on.XApply the electric parking brake.
If it is not possible to apply the electric parking brake:
XMove the transmission selector lever to P.XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake:
XRelease the electric parking brake automatically ( Y page 163).
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.The yellow ! warning lamp lights up. If you manually apply or
release the electric parking brake, the red ! indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.XMove the transmission selector lever to P.XVisit a qualified specialist workshop.Display messages231On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions!
Parking brake inop‐
erativeThe yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.XRectify the cause of the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.XApply or release the electric parking brake.
If it remains impossible to apply or release the electric parking
brake:
XSwitch off the ignition and turn it back on.XApply or release the electric parking brake.
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.The display message is only shown while the vehicle is in motion.
The red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
It is not possible to apply the electric parking brake manually.XMove the transmission selector lever to P.XVisit a qualified specialist workshop.!
Turn on the igni‐
tion to release
the parking brakeThe red ! indicator lamp lights up.
You attempted to release the electric parking brake while the igni-
tion was switched off.XTurn the key to position 1 in the ignition lock.J
Brake immediatelyVehicles with manual transmission: a malfunction has occurred
while the HOLD function was activated.
A tone may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.XPaying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disap-
pears.XSecure the vehicle against rolling away ( Y page 162).
You can restart the engine.232Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsJ
Check brake fluid
levelThere is insufficient brake fluid in the brake fluid reservoir.
In addition, the red J warning lamp lights up in the instrument
cluster and a warning tone sounds.GWARNING
The braking efficiency may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XSecure the vehicle against rolling away ( Y page 162).XConsult a qualified specialist workshop.XDo not top up the brake fluid. This does not correct the fault.#
Check brake pad
wearThe brake pads/linings have reached their wear limit.XVisit a qualified specialist workshop.PRE-SAFE
inoperative See
Owner's ManualImportant functions of PRE-SAFE ®
have failed. All other occupant
safety systems, e.g. airbags, remain available.XVisit a qualified specialist workshop immediately.Collision Preven‐
tion Assist Plus
currently unavail‐
able See Owner's
ManualCOLLISION PREVENTION ASSIST PLUS is temporarily inoperative.
Possible causes:
R the radar sensor cover in the radiator trim is dirty.
R the function is impaired due to heavy rain or snow.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Once the causes listed above no longer apply, the display message
goes out.
COLLISION PREVENTION ASSIST PLUS is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the radar sensor cover in the radiator grille
( Y page 291).XRestart the engine.Display messages233On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsýIf the symbol appears in the multifunction display, a seat belt
tongue has not been inserted in a rear seat belt buckle.GWARNING
A seat belt which is not worn correctly, or which has not been
engaged in the seat belt buckle correctly, cannot provide the
intended level of protection.
This poses an increased risk of injury.
XIf necessary, ask the occupants in the rear to fasten their seat
belts ( Y page 48).
Further information on the status indicator for the rear seat belts
( Y page 49).
6
Restraint sys. mal‐
function Consult
workshopThere is a malfunction in the SRS (Supplemental Restraint Sys-
tem). The 6 warning lamp also lights up in the instrument clus-
ter.GWARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
XVisit a qualified specialist workshop.
Further information on occupant safety ( Y page 40).
6
Front left malfunc‐
tion Consult work‐
shop  or Front
right malfunction
Consult workshopSRS has malfunctioned at the front on the left or right. The 6
warning lamp also lights up in the instrument cluster.GWARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
XVisit a qualified specialist workshop.Display messages235On-board computer and displaysZ