2014 MERCEDES-BENZ CLA radiator

Engine
Display messagesPossible causes/consequences and
Solutions

Check Coolant See
Operator's Manual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
XAdd coolant, observing the warning notes before doing so
(Ypage 283).
XIf coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop.
\rThe fan motor is faulty.
XAt coolant temperatures below 248 ‡ (120 †), drive to the
nearestqualified specialist workshop.
XAvoid subjecting the engineto heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
\r
Coolant Too Hot
Stop Vehicle Turn
Engine Off
The coolant is too hot.
Awarning tone also sounds.
GWARNING
Do notdrive when yourengine is overheated. Thiscan cause some
fluids which may have leaked into the engine compartmentto
catch fire.
Steamfrom the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
XWaituntil the engine has cooled down.
XMake sure thatthe air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XDo not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †).
Otherwise, the engine could 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 248 ‡ (120 †).
Display messages227
On-board computer and displays
Z

Display messagesPossible causes/consequences and
Solutions
Park Assist
Inoperative
You have just carried out a large number of turning or parking
maneuvers.
Active Parking Assistwill become available again after
approximately ten minutes (Ypage 178).
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSwitch off and restart the engine.
If the display message continues to be displayed:
XVisit a qualified specialist workshop.
PARKTRONIC is defective.
XVisit a qualified specialist workshop.
DISTRONIC PLUS OffDISTRONIC PLUS has been deactivated (Ypage 164). If it was
deactivated automatically, a warning tone also sounds.
DISTRONICPLUSNow
Available
DISTRONIC PLUS is operational again after having been
temporarily unavailable. You can now reactivate DISTRONIC PLUS
(Ypage 164).
DISTRONIC PLUS
Currently
Unavailable See
Operator's Manual
DISTRONIC PLUS is temporarily inoperative. Possible causes are:
Rfunction is impaired due to heavy rain or snow.
Rthe sensors in the radiator trim are dirty
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
Rthe system is outside the operating temperature range.
Rthe on-board voltage is too low.
Awarning tone also sounds.
When the causes stated above no longer apply, the display
message disappears.
DISTRONIC is operational again.
If the display message does notdisappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
XClean the sensors in the radiator trim (Ypage 289).
XRestartthe engine.
232Display messages
On-board computer and displays

ProblemPossible causes/consequences and
Solutions
\r
The red coolant
warning lamp comes on
while the engine is
running.
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
malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
XObserve the additional display messages in the multifunction
display.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
XLeave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
XCheck the coolant level and add coolant (Ypage 283). Observe
the warning notes.
XIf you need to add coolant more often than usual, have the
engine coolant system checked.
XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XDo not start the engine again until the coolant temperature is
under 248‡(120 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
\r
The red coolant
warning lamp comes on
while the engine is
running. A warning tone
also sounds.
The coolant temperature has exceeded 248 ‡ (120 †). The
airflow to the engine radiator may be blocked or the coolant level
may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive whenyour engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Vapor from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction
display.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
Warning and indicator lamps in the instrument cluster249
On-board computer and displays
Z

ProblemPossible causes/consequences and
Solutions
XLeave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
XCheck the coolant level and add coolant (Ypage 283). Observe
the warning notes.
XIf you need to add coolant more often than usual, have the
engine coolant system checked.
XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XAt coolant temperatures under 248‡(120 †), drive to the next
qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
Driving systems
ProblemPossible causes/consequences and
Solutions

The red distance
warning lamp lights up
while the vehicle is in
motion.
The distance to the vehicle in front is too smallfor the speed
selected.
XIncrease the distance.

The red distance
warning lamp lights up
while the vehicle is in
motion. A warning tone
also sounds.
You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
For further information about the distance warning function of
COLLISION PREVENTION ASSIST (Ypage 62).
For further information about COLLISION PREVENTION ASSIST
PLUS (Ypage 64).
250Warning and indicator lamps in the instrument cluster
On-board computer and displays

Useful information
iThis Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
iRead the information on qualified
specialist workshops: (Ypage 25).
Engine compartment
Hood
Important safety notes
GWARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving.
GWARNING
When opening and closing the hood, it may
suddenly fall into the closed position.There is
a risk of injury to persons within range of
movement of the hood.
Open and close the hood only when no one is
within its range of movement.
GWARNING
Certain components in the engine
compartment, such as the engine, radiator
and parts of the exhaust system, can become
very hot. Working in the engine compartment
poses a risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
Opening the hood when the engine is
overheated or when there is a fire in the
engine compartmentcould expose you to hot
gases or other service products. There is a
risk of injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment,
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rkeep clothing away from moving parts
GWARNING
The ignition system and the fuel injection
system work under high voltage. If you touch
components which are under voltage, you
could get an electric shock. There is a risk of
injury.
Never touch components of the ignition
system or fuel injection system when the
ignition is switched on.
Opening the hood
GWARNING
When the hood is open and the windshield
wipers are set in motion,you can be injured
by the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
280Engine compartment
Maintenance and care

!Make sure that the windshieldwipers are
not folded away fromthe windshield. You
could otherwise damage the windshield
wipers or the hood.
XMake sure that the windshield wipers are
switched off.
XPull release leveron the hood.
The hood is released.
XReach into the gap between the hood and
the radiator trim and press hood catch
leverto the left.
XRaise the hood.
XPull support strut!out of bracket.
XLift up support strut!and insert it into
yellow retaining clip".
Closing the hood
XRaise the hood slightly and, at the same
time, remove support strut!from yellow
retaining clip".
XSwing support strut!down and press it
into bracketuntil it engages.
XLower the hood and let it fall from a height
of approximately 8 in (20 cm).
XCheck that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Do not press the hood
closed. Open the hood again and close it
with a little more force.
Engine oil
General notes
Depending on the driving style, the vehicle
consumes up to 0.9 US qt (0.8 liters) of oil
overadistanceof600 miles(1,000 km). The
oil consumption may be higher than this when
the vehicle is new or if you frequently drive at
high engine speeds.
Depending on the engine, the oil dipstickmay
be in a different location.
When checking the oil level:
Rpark the vehicle on a level surface.
Rthe engine should be switched off for
approximately five minutes if the engine is
at normal operating temperature.
Rif the engine is not at normal operating
temperature, e.g.ifthe engine was only
started briefly: wait about 30 minutes
before carrying out the measurement.
Engine compartment281
Maintenance and care
Z

Filling capacities
ModelCapacity
CLA 250Approx. 8.2 US qt
(7.8 l)
iUse antifreeze/corrosioninhibitor
according to MB approval 325.0 or 326.0.
Windshieldwasher system
Important safety notes
GWARNING
Windshield washer concentrate is highly
flammable. If it comes into contact with hot
engine components or the exhaust system it
could ignite. There is a risk of fire and injury.
Make sure that no windshield washer
concentrate is spilled next to the filler neck.
!Do not add distilled or de-ionized water to
the washer fluid container. Otherwise, the
level sensor may be damaged.
!Only MB SummerFit and MB WinterFit
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
When handling washer fluid, observe the
important safety notes on service products
(Ypage 345).
At temperatures above freezing:
XFill the washer fluid reservoir with a mixture
of water and windshield washer fluid, e.g.
MB SummerFit.
Add 1 part MB SummerFit to 100 parts water.
At temperatures below freezing:
XFill the washer fluid reservoir with a mixture
of water and washer fluid, e.g. MB
WinterFit.
Adaptthe mixing ratio to the outside
temperature.
RDown to 14 ‡ (10 †): mix 1 part MB
WinterFit with 2 parts water.
RDown to4 ‡ (20 †): mix 1 part MB
WinterFit with 1 part water.
RDown to20.2 ‡ (29 †): mix 2 parts MB
WinterFit with 1 part water.
iAdd windshield washer fluid, e.g. MB
SummerFit or MB WinterFit, to the washer
fluid all year round.
Climate control system refrigerant
Important safety notes
Type of refrigerant
The climate control system of your vehicle is
filled with refrigerant R-134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
Refrigerant R-134a
!Only the refrigerant R-134a and the PAG
oil approved by Mercedes-Benzmay be
used. The approved PAG oil may notbe
mixed with any other PAG oil that is not
approved for R-134a refrigerant.
Otherwise, the climate control system may
be damaged.
Service work, such as topping-up refrigerant
or replacing components, may only be carried
out by a qualified specialist workshop.All
applicable regulations must be adhered to,
SAE standard J639 included.
Always have work on the climate control
system carried out at a qualified specialist
workshop.
350Service products and filling capacities
Technical data