2013 MERCEDES-BENZ CLA-CLASS engine

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
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Instrument cluster
Selecting the unit of measurement for dis-
tance
You can determine whether the multifunction
display shows some messages in miles or kil-
ometres.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Inst. cluster submenu.XPress a to confirm.XPress the : or 9 button to select the
Display unit Speed-/odometer: func-
tion.
You will see the selected setting km or
miles .XPress the a button to save the setting.
The selected unit of measurement for dis-
tance applies to:
R the digital speedometer in the Trip menu
R the total distance recorder and the trip
meter
R the trip computer
R the current consumption and the range
R the navigation instructions in the Navi
menu
R cruise control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display
Switching the additional speedometer
on/off
The Dig. speedo [mph]: or Dig. speedo
[km/h]: (vehicles for the United Kingdom)
function allows you to choose whether the
status area in the multifunction display
always shows the speed in mph or in km/h
(United Kingdom) instead of the outside tem-
perature.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Inst. cluster submenu.XPress a to confirm.XPress : or 9 to select the Dig.
speedo [mph]: or Dig. speedo
[km/h]: (United Kingdom) function.
You will see the selected setting: on or
off .XPress the a button to save the setting.
Selecting the permanent display function
You can determine whether the multifunction
display permanently shows your speed or the
outside temperature.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Inst. cluster submenu.XPress a to confirm.XPress the : or 9 button to select the
Permanent display: function.
You will see the selected setting outside
temperature or Dig. speedo [mph] /
Dig. speedo [km/h] (vehicles for the Uni-
ted Kingdom).XPress the a button to save the setting.
i
The speed is displayed in mph or in
km/h (United Kingdom).
Lights
Switching the daytime driving lights on/
off
The Daytime driving lights function can
only be switched on with the engine turned
off.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Light submenu.XPress a to confirm.220Menus and submenusOn-board computer and displays
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This function is only available on vehicles with
the Intelligent Light System.
For further information about Adaptive High-
beam Assist, see ( Y page 111).
Setting the brightness of the ambient
lightingXPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Light submenu.XPress a to confirm.XPress the : or 9 button to select the
Amb. light +/- function.
You will see the selected setting.XPress a to confirm.XPress the : or 9 button to adjust the
brightness to any level from Off toLevel
5 (bright) .XPress the a or % button to save the
setting.
Activating/deactivating the surround
lighting and exterior lighting delayed
switch-off
If you have activated the Surround light‐
ing function and the light switch is set to
à , the following functions are activated
when it is dark:
R surround lighting: the exterior lighting
remains lit for 40 seconds after unlocking
with the key. If you start the engine, the
surround lighting is switched off and auto-
matic headlamp mode is activated
( Y page 107).
R exterior lighting delayed switch-off: the
exterior lighting remains lit for
60 seconds after the engine is switched off.
If you close all the doors and the boot lid,
the exterior lighting goes off after
15 seconds.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Light submenu.XPress a to confirm.XPress the : or 9 button to select the
Surround lighting function.
When the Surround lighting function is
activated, the light cone and the area
around the vehicle are displayed in red in
the multifunction display.XPress the a button to save the setting.
Deactivating delayed switch-off of the exte-
rior lighting temporarily:
XBefore leaving the vehicle, turn the key to
position 0 in the ignition lock.XTurn the key to position 2 in the ignition
lock.
The exterior lighting delayed switch-off is
deactivated.
Delayed switch-off of the exterior lighting is
reactivated the next time you start the
engine.
i Depending on your vehicle's equipment,
when the surround lighting and delayed
switch-off exterior lighting are on, the fol-
lowing light up:
R Side lamps
R Foglamps
R Dipped-beam headlamps
R Daytime driving lights
R Surround lighting in the exterior mirrors
Activating/deactivating the interior light-
ing delayed switch-off
If you activate the Lighting delayed sw.
off function, the interior lighting remains on
for 20 seconds after you remove the key from
the ignition lock.
XPress the = or ; button on the steer-
ing wheel to select the Settings menu.XPress the : or 9 button to select the
Light submenu.XPress a to confirm.222Menus and submenusOn-board computer and displays
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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
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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 displaysZProCarManuals.com

Display messagesPossible causes/consequences and M SolutionsCollision Preven‐
tion Assist Plus
inoperativeCOLLISION PREVENTION ASSIST PLUS is malfunctioning. The dis-
tance warning signal may also have failed.XVisit a qualified specialist workshop.PRE-SAFE
Function currently
limited See Own‐
er's ManualAdaptive Brake Assist is temporarily inoperative. Possible causes:
R the front bumper 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.
Adaptive Brake Assist 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 front bumper ( Y page 291).XRestart the engine.PRE-SAFE
Function limited
See Owner's ManualAdaptive Brake Assist is faulty. The distance warning signal may
also have failed.XVisit a qualified specialist workshop.üIf the symbol appears in the multifunction display, a seat belt
tongue has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
( Y page 49).234Display messagesOn-board computer and displays
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Display messagesPossible causes/consequences and M SolutionsAdaptive Main-beam
Assist inoperativeAdaptive Highbeam Assist is faulty.XVisit a qualified specialist workshop.Adaptive Main-beam
Assist currently
unavailable See
Owner's ManualAdaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes:
R the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.XClean the windscreen.
If the system detects that the camera is fully operational again,
the Adaptive Main-beam Assist available again message
is displayed.
Adaptive Highbeam Assist is operational again.
Engine
Display messagesPossible causes/consequences and M Solutions+
Top up coolant See
Owner's ManualThe coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.XTop up the coolant, observing the warning notes before doing
so ( Y page 285).XIf the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop.?The fan motor is faulty.XIf the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.XAvoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic.240Display messagesOn-board computer and displays
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Display messagesPossible causes/consequences and M Solutions?
Coolant Stop car,
turn engine offThe coolant is too hot.
A warning tone also sounds.GWARNING
Never drive with an overheated engine. Driving when your engine
is overheated can cause some fluids which may have leaked into
the engine compartment to catch fire.
Steam from an overheated engine can cause serious burns, which
can occur just by opening the bonnet.
There is a risk of injury.
XStop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.XSecure the vehicle against rolling away ( Y page 162).XWait until the engine has cooled down.XMake sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.XDo not start the engine again until the display message goes out
and the coolant temperature is below 120 †. The engine may
otherwise be damaged.XPay attention to the coolant temperature display.XIf the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 120 †.
#The battery is not being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronicsXStop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.XOpen the bonnet.XCheck whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
XConsult a qualified specialist workshop.
If the poly-V-belt is OK:
XVisit a qualified specialist workshop immediately.Display messages241On-board computer and displaysZProCarManuals.com