2013 MERCEDES-BENZ CLA-CLASS coolant level

Child seatAutomatic recognition .....................53
ISOFIX .............................................. 54
On the front-passenger seat ............52
Problem (malfunction) .....................62
Recommendations ...........................59
Suitable positions ............................ 57
Top Tether ....................................... 55
Cigarette lighter ................................ 276
Cleaning Trailer tow hitch ............................. 292
Climate control
Auxiliary heating/ventilation .......... 136
Controlling automatically ...............130
Convenience opening/closing
(air-recirculation mode) .................134
Cooling with air dehumidification ..128
Demisting the windows .................. 132
Demisting the windscreen .............132
Important safety notes ..................124
Indicator lamp ................................ 130
Notes on using THERMATIC auto-
matic climate control .....................125
Notes on using THERMOTRONIC
automatic climate control ..............127
Overview of systems ......................124
Problems with cooling with air
dehumidification ............................ 130
Problem with the rear window
heating .......................................... 134
Setting the air distribution .............131
Setting the airflow .........................131
Setting the air vents ......................141
Setting the temperature ................130
Switching air-recirculation mode
on/off ............................................ 134
Switching on/off ........................... 128
Switching residual heat on/off ......135
Switching the rear window heat-
ing on/off ...................................... 133
Switching the ZONE function on/
off .................................................. 131
THERMATIC automatic climate
control ........................................... 125
THERMOTRONIC (2-zone) auto-
matic climate control .....................127Cockpit
Overview .......................................... 28
see Instrument cluster
COLLISION PREVENTION ASSIST
Activating/deactivating the dis-
tance warning function ..................218
Display message ............................ 227
Operation/notes .............................. 65
COLLISION PREVENTION ASSIST
PLUS Activating/deactivating .................218
Display message ............................ 233
Operation/notes .............................. 67
COMAND Online
see separate operating instructions
Combination switch .......................... 109
Consumption statistics (on-board
computer) .......................................... 211
Convenience closing feature .............. 88
Convenience opening/closing (air-
recirculation mode) ........................... 134
Convenience opening feature ............ 88
Coolant (engine) Checking the level .........................285
Display message ............................ 240
Important safety notes ..................341
Temperature gauge ........................ 208
Warning lamp ................................. 262
Cooling
see Climate control
Copyright ............................................. 25
Cornering lamps Changing bulbs .............................. 117
Cornering light function
Display message ............................ 236
Function/notes ............................. 111
Crash-responsive emergency light-
ing ....................................................... 114
Cruise control Activation conditions .....................169
Cruise control lever .......................169
Deactivating ................................... 170
Display message ............................ 247
Driving system ............................... 168
Important safety notes ..................168
LIM indicator lamp .........................169
Selecting ........................................ 169Index7ProCarManuals.com

Important safety notes ..................337
Low outside temperatures .............339
Problem (malfunction) ...................161
Quality (diesel) ............................... 339
Refuelling ....................................... 159
Tank content/reserve fuel .............337
Fuel filler flap
Opening/closing ............................ 160
Fuel filter (white display message) . 242
Fuel level Calling up the range (on-board
computer) ...................................... 212
Gauge .............................................. 30
Fuel reserve
see Fuel
Fuel tank
Capacity ........................................ 337
Problem (malfunction) ...................161
Fuses
Allocation chart ............................. 313
Before changing ............................. 312
Fuse box in the engine compart-
ment .............................................. 312
Fuse box in the front-passenger
footwell .......................................... 313
Important safety notes ..................312
G
Gear or selector lever (cleaning
instructions) ...................................... 293
Genuine Mercedes-Benz parts ........... 21
Glove compartment .......................... 269
H
Handbrake see Parking brake
Hazard warning lamps ...................... 110
Display message ............................ 254
Headlamp
Cleaning system (function) ............110
Cleaning system (notes) ................342
Headlamps
Misting up ...................................... 113
Topping up the cleaning system ....286
see Automatic headlamp mode
Head restraints
Adjusting ......................................... 97
Adjusting (electrically) .....................98
Adjusting (manually) ........................97
Adjusting (rear) ................................ 98
Fitting/removing (rear) ....................98
Heating
see Climate control
High-pressure cleaners .................... 289
Hill start assist .................................. 147
HOLD function Deactivating ................................... 182
Display message ............................ 243
Function/notes ............................. 181
I
Ignition lock see Key positions
Immobiliser .......................................... 71
Indicator and warning lamps Coolant .......................................... 262
DISTRONIC PLUS ........................... 264
Engine diagnostics .........................262
Indicator lamps
Display message ............................ 237
see Warning and indicator lamps
Indicators
see Turn signals
Inspection
see ASSYST PLUS
Instrument cluster
Overview .......................................... 30
Settings ......................................... 220
Warning and indicator lamps ...........32
Instrument cluster lighting .............. 208
Intelligent Light System Activating/deactivating .................221
Display message ............................ 239
Overview ........................................ 110
Setting the dipped-beam head-
lamps for driving on the right/left . 221
Interior lighting ................................. 113
Automatic control system ..............114
Delayed switch-off (on-board
computer) ...................................... 222
Emergency lighting ........................114
Manual control ............................... 114
Index11ProCarManuals.com

ProblemPossible causes/consequences and M SolutionsVehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.XHave the cause rectified immediately at a qualified specialist
workshop.The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be on and a
warning tone may
sound.The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.XStop as soon as possible and allow the engine and the coolant
to cool down.XCheck the coolant level ( Y page 285). Observe the warning
notes as you do so and top up the coolant if necessary.If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.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.Manual transmission
Gear lever
! Only engage gear when the clutch pedal
is depressed.
! When shifting to 5th and 6th gear, you
must press the shift lever to the right. Oth-
erwise, you could shift unintentionally into
3rd or 4th gear and damage the engine or
transmission.
If you shift down at too high a speed (trans-
mission braking), this can cause the engine
to overrev, leading to engine damage.
Do not use the clutch bite point to keep the
vehicle stationary on uphill gradients.
There is otherwise a risk of damaging the
clutch.
! On long and steep downhill gradients,
especially if the vehicle is laden or towing
a trailer, you must shift into gear 1, 2 or 3
in good time. This uses the engine's braking
effect. This relieves the load on the brake
system and prevents the brakes from over-
heating and wearing too quickly.
Gear lever
kReverse gear1 to 6Forward gearsManual transmission151Driving and parkingZProCarManuals.com

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos-
sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: ( Y page 24).
Important safety notes
GWARNING
Operating the integrated information systems
and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There
is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
The on-board computer only shows messages
or warnings from certain systems in the mul-
tifunction display. You should therefore make
sure your vehicle is operating safely at all
times. Otherwise, a vehicle that is not oper-
ating safely may cause an accident.
For an overview, see the instrument panel
illustration ( Y page 30).
Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is on the bottom
left of the instrument cluster ( Y page 30).
XTurn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã, T or
L , the brightness is dependant upon
the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated.
Coolant temperature gauge
GWARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking
service products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in
the engine compartment, leave the bonnet
closed and notify the fire brigade.
The coolant temperature gauge is in the
instrument cluster on the right-hand side.
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 120 †.
208Displays and operationOn-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

EngineProblemPossible causes/consequences and M Solutions;
The yellow engine diag-
nostics warning lamp
lights up while the
engine is running.There may be a fault, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with petrol engines)
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.XHave the vehicle checked as soon as possible at a qualified
specialist workshop.Vehicles with a diesel engine: the fuel tank has been run dry
( Y page 161).XStart the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emer-
gency running mode is cancelled. The vehicle need not be
checked.æ
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated when the fuel level
drops into the reserve range.XRefuel at the nearest filling station.?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the 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.XStop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine. Do not continue driving
under any circumstances.XSecure the vehicle against rolling away ( Y page 162).XConsult a qualified specialist workshop.262Warning and indicator lamps in the instrument clusterOn-board computer and displays
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ProblemPossible 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.XObserve the additional display messages in the multifunction
display.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).XLeave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.XCheck the coolant level and top up the coolant ( Y page 285).
Observe the warning notes as you do so.XIf you have to top up the coolant frequently, have the engine
cooling system checked.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 coolant temperature is
below 120 †. The engine may otherwise be damaged.XDrive 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.?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. A warning 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.GWARNING
The engine is not being cooled sufficiently and may be damaged.
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.
This poses a risk of injury.
XObserve the additional display messages in the multifunction
display.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).Warning and indicator lamps in the instrument cluster263On-board computer and displaysZProCarManuals.com