climate control MERCEDES-BENZ CLA 2014 Owner's Manual

Problems with the rear window defroster
ProblemPossible causes/consequences and
Solutions
The rear window
defroster has
deactivated
prematurely or cannot
be activated.
The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Activating/deactivating air-
recirculation mode
Points to observe before use
You can deactivate the flow of fresh air if
unpleasant odors are enteringthe vehicle
from outside. The air already inside the
vehicle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
The operation of air-recirculation mode is the
same for all control panels.
Activating/deactivating
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
iAir-recirculation mode is activated
automatically at high outside
temperatures. When air-recirculation mode
is activated automatically, the indicator
lamp in thebutton is not lit.
Outside air is added after about
30 minutes.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
iAir-recirculation mode deactivates
automatically:
Rafter approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
Rafter approximately five minutes if the
"Cooling with air dehumidification"
function is deactivated
Rafter approximately 30 minutes at
outside temperatures above
approximately 41‡(5†) if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating the residual
heat function
The residual heat function is only available in
vehicles for Canada with automatic climate
control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends on the temperature that has been
set.
iThe blower will run at a low speed
regardless of the airflow setting.
iIf you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
Operating the climate control systems131
Climate control

XTurn the SmartKey to position0in the
ignition lock or remove it (Ypage 137).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
iResidual heat is deactivated
automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Setting the air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air
outlets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield
and the hood free of blockages, such as ice,
snow or leaves.
Rnever cover the air vents or air intake grilles
in the vehicle interior.
iYou can move the adjusters for the air
vents vertically or horizontally to set the
direction of the airflow.
iFor optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the center air vents
XTo open the center air vent:turn the
adjuster in one of center air vents
counter-clockwise.
XTo close the center air vent:turn the
adjuster in one of center air vents
clockwise until it engages.
Setting the side air vents
Side window defroster vent
Side air vent
XTo openaside air vent:turn the adjuster
in side air ventcounter-clockwise.
XTo closeaside air vent:turn the adjuster
in side air ventclockwise until it
engages.
132Setting the air vents
Climate control

Setting the rear-compartment air
vents
Rear-compartment air vent, left
Rear-compartment air vent, right
"Rear-compartment air vent thumbwheel
XTo open/close:turn thumbwheel"up or
down.
Setting the air vents133
Climate control
Z

iMake sure that you clear the memory of
the integrated garage door opener before
selling the vehicle.
Compass
Calling up the compass
The compass displays in which compass
direction the vehicle is currently traveling:N,
NE,E,SE,S,SW,WorNW.
To receive a correct display in rear-view
mirror, the compass must be calibrated
and the magnetic field zone set.
Setting the compass
XDetermine your position using the following
zone maps.
North America zone map
South America zone map
XPush a round pen into opening
"(Ypage 276) for approximately three
seconds.
The zone currently selected appears in
compass display(Ypage 276).
XTo selectthe zone:push a round pen into
opening"(Ypage 276) until the desired
zone is selected.
If, after a few seconds, the display in
compass display(Ypage 276) changes
direction, the zone has been selected.
Calibrating the compass
XMake sure that there is sufficient space for
you to drive in a circle without impeding
traffic.
In order to calibrate the compass correctly,
do the following:
Rcalibrate the compass in the open and not
in the vicinity of steel structures or high-
voltage transmission lines.
Rswitch off electrical consumers such as the
climate control, windshield wipers or rear
window defroster.
Rclose all doors and the trunk lid.
XSwitch on the ignition.
XPush a round pen into opening
"(Ypage 276) for approximately six
276Features
Stowage and features

Uniform Tire Quality Grading
Standards
Overview of Tire Quality Grading
Standards
Uniform Tire Quality Grading Standards are
U.S. government specifications. Their
purpose is to provide drivers with uniform
reliable information on tire performance data.
Tire manufacturers have to grade tires using
three performance factors: tread wear,
tire traction, and heat resistance".
These regulations do not apply to Canada.
Nevertheless, all tires sold in North America
are provided with the corresponding quality
grading markings on the sidewall of the tire.
All passenger car tires must conform to the
statutory safety requirements in addition to
these grades.
Where applicable, the tire grading
information can be found on the tire sidewall
between the tread shoulder and maximum
tire width.
iThe actual values for tires are vehicle-
specific and may deviate from the values in
the illustration.
For example:
TreadwearTractionTemperature
200AAA
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
U.S. government course. For example, a tire
graded 150 would wear one and one-half
times as well on the government course as a
tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use,
however, and may depart significantly from
the norm, due to variations in driving habits,
service practices and differences in road
characteristics and climateconditions.
Traction
GWARNING
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
The traction grades, from highest to lowest,
are AA, A, B, and C. Those grades represent
the tire's ability to stop on a wet surface as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete.Atire marked C may have poor
traction performance.
The safe speed on a wet, snow covered or icy
road is always lower than on dry road
surfaces.
You should pay special attention to road
conditions when temperatures are around
the freezing point.
Mercedes-Benz recommends a minimum
tread depth of\nin(4mm) for all four winter
tires (Ypage 314) to maintainnormal driving
characteristics in winter. Winter tires can
reduce the braking distance on snow-covered
surfaces in comparison with summer tires.
Stopping distance, however, is still
considerably greater than when the road is
328Uniform Tire Quality Grading Standards
Wheels and tires

Service products include the following:
RFuels
RLubricants (e.g. engine oil, transmissionoil)
RCoolant
RBrake fluid
RWindshield washer fluid
RClimate control system refrigerant
Components and service products must be
matched.You should thereforeonly use
products thathave been tested and approved
by Mercedes-Benz.
Information about tested and approved
products can be obtained from an authorized
Mercedes-Benz Center or on the Internet at
http://bevo.mercedes-benz.com.
You can recognize service products approved
by Mercedes-Benzby the following
inscription on the containers:
RMB-Freigabe (e.g. MB-Freigabe 229.51)
RMB Approval (e.g. MB Approval 229.51)
Other designations or recommendations
indicate a level of quality or a specification in
accordance with an MB Sheet number (e.g.
MB 229.5). Theyhave notnecessarily been
approved by Mercedes-Benz.
Fuel
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before
refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
RIf fuel is swallowed, seek medical
assistance without delay. Do not induce
vomiting.
RImmediately change out of clothing which
has come into contact with fuel.
Tank capacity
ModelTotal
capacity
AMG vehicles14.8 US gal
(56.0 l)
All other models13.2 US qt
(50.0 l)
ModelOf which
reserve
AMG vehiclesApprox.
2.1 US gal
(8.0 l)
All other modelsApprox.
1.6 US qt
(6.0 l)
Gasoline
Fuel grade (AMG vehicles)
Fuel grade (except AMG vehicles)
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
346Service products and filling capacities
Technical data

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