climate control MERCEDES-BENZ CLS 2014 Owner's Manual

Problems with the rear window defroster
ProblemPossible causes/consequences andSolutions
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 147).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
iDual-zone automatic climate control: air-
recirculation mode is automatically
activated at high outside temperatures.
3-zone automatic climate control: air-
recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures.
When air-recirculation mode is activated
automatically,the indicator lamp above the
button does not light up. 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
cooling with air dehumidification is
deactivated
Rafter approximately 30 minutes at
outside temperatures above
approximately 41 ‡(5†)if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating theresidual
heat function
The residual heat function is only available in
vehicles for Canada with 3-zoneautomatic
climate control.
It is possible to makeuse of the residual heat
of the engine to continue heatingthe vehicle
for approximately 30 minutes after the engine
has been switched off.The heating time
depends on the temperature that has been
set.
Operating the climate control systems141
Climat ec ontrol

XTurn the SmartKey to position0in the
ignition lock or remove it (Ypage 147).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
iIf the residual heat function is activated,
the windows may fog up on the inside.
iThe blower will run atalow speed
regardless of the airflow setting.
iIf you activatethe residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
Residualheat 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 vicinityofthe air vents. There
isarisk of injury.
Make sure that all vehicle occupantsalways
maintainasufficient distancetothe 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 ventsinto 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 ventsorair intakegrilles
in the vehicle interior.
Setting the center air vents
Center air vent,left
Center air vent,right
$Center vent thumbwheel, right
!Center vent thumbwheel, left
XTo open/close:turn thumbwheels$
and!up or down.
Setting the side air vents
Defroster vent
Side air vent
$Control for side air vent
XTo open/close:turn thumbwheel$up or
down.
Setting the glove box air vent
!Close the air vent when heating the
vehicle.
At high outside temperatures, open the air
vent and activatethe "cooling with air
142Setting the air vents
Climate control

dehumidification" function.Otherwise,
temperature-sensitive items stored in the
glove boxcould be damaged.
Air vent thumbwheel
Air vent
When automatic climate control is activated,
the glove box can be ventilated, for instance
to cool its contents.The level of airflow
depends on the airflow and air distribution
settings.
XTo open/close:turn thumbwheel
clockwise or counter-clockwise.
Setting the rear-compartment air
vents
Setting the center vents in the rear
compartment
Rear-compartment air vent thumbwheel
Rear-compartment air vent,right
$Rear control panel, only for Canada with
3-zone automatic climate control
!Rear-compartment air vent,left
XTo open/close:turn thumbwheelup or
down.
Setting the air vents143
Climat ec ontrol
Z

Calibratingthecompass
XMakesure that there is sufficient spacefor
you to driveinacircle without impeding
traffic.
In order to calibratethecompasscorrectly,
do thefollowing:
Rcalibratethecompassintheopen and not
in thevicinity of steel structures or high-
voltage transmission lines.
Rswitch off electrical consumerssuchasthe
climate control, windshield wipersorrear
window defroster.
Rclose all doorsand thetrunk lid.
XSwitch on theignition.
XPress and hold button$(Ypage 302) for
approximately six seconds until the
Csymbol appearsincompassdisplay
(Ypage 302).
XDrive inafull circle at approximately
3mph (5 km/h)to6mph (10 km/h).
When thecalibration has successfully been
completed, thecurrentdirection is shown
in compass display(Ypage 302).
Floormats
GWARNING
Objectsinthe driver's footwell can restrictthe
pedal travel or obstructadepressed pedal.
The operatingand road safety of the vehicle
is jeopardized. There isarisk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficientclearancefor the pedals. Do not use
loose floormats.
XSlide the seat backwards.
XTo install:place the floormat in the
footwell.
XPress studsontoretainers.
XTo remove:pull the floormat off
retainers.
XRemove the floormat.
Features303
Stowage and features
Z

Example:
RTreadweargrade:200
RTractiongrade:AA
RTemperature grade:A
All passengercar tires must conform to the
statutory safety requirements in additionto
these grades.
iTheactual values for tires arevehicle-
specificand maydeviate from the values in
the illustration.
Treadwear
The treadweargrade isacomparative rating
based on the wearrate of thetirewhen tested
undercontrolled conditions onaspecified
U.S. government course. For example,atire
graded 150 would wear one and one-half
times as well on the government course as a
tire graded 100.
The relative performanceoftires 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 climate conditions.
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.
!Avoid wheelspin. This can lead to damage
to the drive train.
The traction grades, from highest to lowest,
are AA, A, B, and C. Those grades represent
the tire's ability to stop onawet surface as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete.Atire markedCmay have poor
traction performance.
The safe speed onawet, snowcovered or icy
road is always lower than on dry road
surfaces.
You should pay special attention to road
conditions when temperatures are around
freezingpoint.
Mercedes-Benzrecommendsaminimum
tread depthofin(4mm)onall four winter
tires. Observe the legally required minimum
tire tread depth (Ypage335). Winter tires can
reduce the braking distance on snow-covered
surfaces in comparison with summer tires.
The braking distance is still much further than
on surfaces that are not icy or covered with
snow. Take appropriate care when driving.
Further informationonwinter tires (M+S
tires) (Ypage336).
Temperature
GWARNING
The temperature grade for this tire is
established foratire that is properly inflated
and not overloaded. Excessive speed,
underinflation, or excessive loading, either
separately or in combination, can cause
excessive heat build-up and possible tire
failure.
The temperature grades areA(the highest),
B, and C. Theserepresent the tire's
resistancetothe generationofheat and its
ability to dissipate heat when tested under
controlled conditions onaspecified indoor
laboratory test wheel. Sustained high
temperature can cause the material of the tire
to degenerateand reduce tire life, and
excessive temperature can lead to sudden
tire failure. The gradeCcorresponds toalevel
of performancewhich all passenger car tires
must meet under the Federal Motor Vehicle
Safety Standard No. 109. GradesBand A
represent higher levels of performanceonthe
laboratory test wheel than the minimum
required by law.
350All about wheelsand tires
Wheels and tires

Example: vehicleidentification plate (Canada only)
VIN
$Paint code
iThe data shown on the vehicle
identificationplate is used only as an
example. This data is differentfor every
vehicle and can deviate from the data
shown here. You can find the data
applicabletoyour vehicle on the vehicle
identification plate.
VIN
XSlide the right-hand front seat to its
rearmost position.
XFold floor coveringupwards.
You will see VIN.
The VIN can also be found in the following
locations:
Ron the lower edge of the windshield
(Ypage 373)
Ron the vehicle identification plate
(Ypage 372)
Engine number
Emission control information plate,
including the certification of both federal
and Californian emissions standards
Engine number (stamped into the
crankcase)
$VIN (on the lower edge of the windshield)
Service products and filling
capacities
Important safety notes
GWARNING
Serviceproducts may be poisonous and
hazardous to health. There isarisk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
HEnvironmental note
Dispose of service products in an
environmentally responsible manner.
Serviceproducts include the following:
RFuels
RLubricants (e.g. engine oil, transmission oil)
RCoolant
RBrake fluid
RWindshield washer fluid
RClimate control system refrigerant
Service products and filling capacities373
Technical data
Z

Windshield washersystemand
headlamp cleaning system
Important safety notes
GWARNING
Windshieldwasher concentrate is highly
flammable. If it comes into contact with hot
engine components or the exhaust systemit
could ignite. There isariskoffire and injury.
Make sure that no windshield washer
concentrate is spilled nexttothe filler neck.
!Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or
MB WinterFit. Unsuitable washer fluid
could damage the plastic lenses of the
headlamps.
!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.
Comply with the importantsafetynotesfor
serviceproductswhen handlingwasher fluid
(Ypage 373).
At temperatures abovefreezing:
XFill thewasherfluid reservoir withamixture
of water and windshield washer fluid, e.g.
MB SummerFit.
Add1part MB SummerFit to 100 partswater.
At temperatures below freezing:
XFill thewasherfluid reservoir withamixture
of water and washer fluid, e.g. MB
WinterFit.
Adapt the mixing ratio to the outside
temperature.
RDown to 14‡("10 †): mix1part MB
WinterFit to2partswater.
RDown to"4‡("20 †): mix1part MB
WinterFit to1part water.
RDown to"20.2‡("29 †): mix2partsMB
WinterFit to1part 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
Typeofrefrigerant
The climate control system of your vehicle is
The instruction label regarding the refrigerant
type used can be foundonthe radiator cross
member.
Refrigerant R-134a
!Only the refrigerantR-134a and the PAG
oil approved by Mercedes-Benzmay be
used. The approved PAGoil 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-uprefrigerant
or replacing components, may only be carried
out byaqualified specialist workshop.All
applicable regulations must be adhered to,
SAEstandard J639 included.
Always have work on the climate control
system carried out ataqualified specialist
workshop.
378Service products and filling capacities
Technica ld ata
filled with refrigerantsR-134a.