MERCEDES-BENZ GLC 2019 Owners Manual

Overview of climate control systems
General notes
Observe the settings recommended on the fol-lowing pages. The windows could otherwise fogup.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-tion function
Ractivate the "Windshield defrosting" functionbriefly, if required
Climate control regulates the temperature andair humidity in the vehicle interior. The interiorfilter cleans the air, thus improving the interiorclimate.
The "Cooling with air dehumidification" functionis only available when the engine is running.Optimum climate control is only achieved withthe side windows and roof closed.
If you start the engine using your smartphone,the last selected climate control setting is reac-tivated (Ypage 134).
The integrated filter filters out most particles ofdust and soot and completely filters out pollen.It also reduces gaseous pollutants and odors. Aclogged filter reduces the amount of air suppliedto the vehicle interior. For this reason, youshould always observe the interval for replacingthe filter, which is specified in the MaintenanceBooklet. As it depends on environmental condi-tions, e.g. heavy air pollution, the interval maybe shorter than stated in the Maintenance Book-let.
iVentilate the vehicle for a brief period duringwarm weather, e.g. using the convenienceopening feature (Ypage 91). This will speedup the cooling process and the desired inte-rior temperature will be reached morequickly.
iIt is possible that the blower may be activa-ted automatically 60 minutes after the Smart-Key has been removed depending on variousfactors, e.g. the outside temperature. Thevehicle is then ventilated for 30 minutes to drythe automatic climate control.
Control panel for dual-zone automatic climate control
Example: control panel for dual-zone automatic climate control
CSets the temperature, left (Ypage 123)
DSets the air distribution (Ypage 124)

Example for vehicles in the USA: control panel for 3-zone automatic climate control
Front control panel
CSets the temperature, left (Ypage 123)
DSets the air distribution, left (Ypage 124)

Vehicles with 3-zone automatic climate control:use the "Residual heat" function if you want toheat or ventilate the vehicle interior when theignition is switched off. The residual heat func-tion can only be activated or deactivated withthe ignition switched off. The residual heat func-tion is deactivated when the ignition is switchedon.
DYNAMIC SELECT switch (except
Mercedes-AMG GLC 63 4MATIC/
GLC 63 S 4MATIC)
You can choose between various drive programswith the DYNAMIC SELECT switch(Ypage 139).
If you have selected drive programE:
Rwhen heating, the electrical heater booster isdeactivated and heat output is reduced as aresult
Rthe rear window defroster running time isreduced
If you have selected drive programC,SorS+,the current climate settings are maintained.
ECO start/stop function
During automatic engine switch-off, the climatecontrol system only operates at a reduced capa-city. If you require the full climate control output,you can switch off the ECO start/stop functionby pressing the ECO button (Ypage 137).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the airsupply and air circulation are also switched off.The windows could fog up. Therefore, switch offclimate control only briefly
Switch on climate control primarily using theXrocker switch (Ypage 123).
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XTo switch on:set the airflow to level1orhigher using theHrocker switch.
XTo switch off:set the airflow to level0usingtheHrocker switch.
i3-zone automatic climate control: when cli-mate control is switched off, "OFF" appears inthe rear-compartment display.
Switching cooling with air dehumidification on/off
General notes
If you deactivate the "Cooling with air-dehumidification" function, the air inside the vehicle will notbe cooled. The air inside the vehicle will also not be dehumidified. The windows can fog up morequickly. Therefore, only deactivate the "Cooling with air-dehumidification" function briefly.
The "Cooling with air dehumidification" function is only available when the engine is running. The airinside the vehicle is cooled and dehumidified according to the temperature selected.
Condensation may drip from the underside of the vehicle when it is in cooling mode. This is normaland not a sign that there is a malfunction.
Activating/deactivating
XPress theZrocker switch up or down.The indicator lamp above the rocker switch lights up or goes out.
122Operating the climate control systems
Climate control

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andPPSolutions
The indicator lamp abovetheZrocker switchremains off. The coolingwith air dehumidificationfunction cannot be acti-vated via the multimediasystem any longer(Ypage 273).
Cooling with air dehumidification has been deactivated due to a mal-function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature is main-tained automatically at a constant level. Thesystem automatically regulates the temperatureof the dispensed air, the airflow and the air dis-tribution.
During automatic controlling, the "Cooling withair dehumidification" function is activated.
Automatic control
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XTo activate:press theXrocker switch upor down.The indicator lamp above theXrockerswitch lights up.
XSet the desired temperature using the

Setting the temperature in the front com-
partment using the front control panel
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XTo increase or reduce:press rocker switch

3-zone automatic climate control
XActivate or deactivate the "Synchronization"function using the multimedia system(Ypage 273).
The synchronization function is deactivated:
Rif the settings for the front-passenger side arechanged
Rthe settings for the rear compartment arechanged
Defrosting the windshield
General notes
You can use this function to defrost the wind-shield or to clear a fogged up windshield or frontside windows on the inside.
Switch off the "Windshield defrosting" functionas soon as the windshield is clear again.
Switching the "Windshield defrosting"
function on or off
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XTo switch on:press rocker switchdonthe front control unit up or down.The indicator lamp above thedrockerswitch lights up. The current climate controlsettings are deactivated.
The climate control system switches to thefollowing functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and frontside windows
Rair-recirculation mode off
iIf necessary, the "Cooling with air dehumid-ification" function is activated. In this case,the indicator lamp above theZrockerswitch remains switched off.
XTo switch off:press rocker switchdup ordown.The indicator lamp above thedrockerswitch goes out. The previously selected set-
tings are restored. Air-recirculation moderemains deactivated.
Removing condensation from the win-
dows
Windows fogged up on the inside
XActivate the "Cooling with air dehumidifica-tion" function with theZrocker switch.
XSwitch on automatic mode using theXrocker switch.
XIf the windows continue to fog up, activate the"Windshield defrosting" function using thedrocker switch.
iYou should only select this setting until thewindshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XSwitch on automatic mode using theXrocker switch.
iIf you clean the windows regularly, they donot fog up so quickly.
Rear window defroster
General notes
The rear window defroster has a high currentdraw. You should therefore switch it off as soonas the rear window is clear. Otherwise, the rearwindow defroster switches off automaticallyafter several minutes.
If the battery voltage is too low, the rear windowdefroster may switch off.
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XPress rocker switchlup or down.The indicator lamp above rocker switchllights up or goes out.
Operating the climate control systems125
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences andPPSolutions
The rear windowdefroster has deactiva-ted prematurely or can-not 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 defrostercan be activated again.
Switching air-recirculation mode
on/off
General notes
You can also temporarily deactivate the flow offresh air manually if unpleasant odors are enter-ing the vehicle from outside. The air alreadyinside the vehicle will then be recirculated.
If you switch on air-recirculation mode, the win-dows can fog up more quickly, in particular atlow temperatures. Only use air-recirculationmode briefly to prevent the windows from fog-ging up.
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).
XTo activate:press therrocker switch upor down.The indicator lamp above therrockerswitch lights up.
Air-recirculation mode switches on automati-cally:
Rat high outside temperatures
Rat high levels of pollution (3-zone automaticclimate control only)
Rin a tunnel (vehicles with a navigation systemonly)
The indicator lamp above therrockerswitch is not lit when automatic air-recirculationmode is activated. Outside air is added afterabout 30 minutes.
XTo deactivate:press therrocker switchup or down.The indicator lamp above therrockerswitch goes out.
Air-recirculation mode deactivates automati-cally:
Rafter approximately five minutes at outsidetemperatures below approximately 41 ‡(5 †)
Rafter approximately five minutes if coolingwith air dehumidification is deactivated
Rafter approximately 30 minutes at outsidetemperatures above approximately 41 ‡(5 †) if the "Cooling with dehumidification"function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available with3-zone automatic climate control.
Once the engine is switched off, it is possible tomake use of the residual heat of the engine tocontinue heating or ventilating the front com-partment of the vehicle for approximately30 minutes. The heating or ventilation timedepends on the interior temperature that hasbeen set.
Activating/deactivating
XTurn the SmartKey to position

XTo deactivate:press the!rocker switchup or down.The indicator lamp above the!rockerswitch goes out.
Residual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Perfume atomizer
Operating the perfume atomizer
GWARNING
If children open the vial, they could drink the
perfume or it could come into contact with
their eyes. There is a risk of injury. Therefore,
do not leave children unsupervised in the vehi-
cle.
If the perfume liquid has been drunk, consult
a doctor. If perfume comes into contact with
your eyes or skin, rinse the eyes with clean
water. If you continue to experience difficul-
ties, consult a doctor.
HEnvironmental note
Full vials must not be dis-
posed of with household
waste. They must be collec-
ted separately and recycled
to protect the environment.
Dispose of full vials in an
environmentally responsible
manner and take them to a
harmful substance collec-
tion point.
CVial lid
DVial
The perfume atomizer helps to improve drivingcomfort.
Via the multimedia system you can:
Rswitch the perfume atomizer on/off(Ypage 273)
Rregulate the perfume intensity (Ypage 273)
The following conditions can affect your percep-tion of the perfume intensity:
Roperating mode of automatic climate control
Rinterior temperature
Rtime of year or day
Rair humidity
Rphysiological condition of occupants, e.g. fati-gue or hunger
The perfume atomizer is active only when theglove box is closed.
The perfume atomizer is provided with a pre-fil-led vial. You can also choose from a variety ofpre-filled vials and an empty vial which you canfill yourself.
If you refill an empty perfume vial, observe theseparate information sheet attached to the vial.
!If you do not use genuine Mercedes-Benzinterior perfumes, observe the safety noteson the perfume packaging.
Do not refill the pre-filled vial when it is empty.Dispose of the used vial after use.
XTo insert the perfume vial:open the glovebox (Ypage 279).
XSlide the perfume vial into the holder as far asit will go.
XTo remove the perfume vial:pull out theperfume vial.
Operating the climate control systems127
Climate control
Z

XTo refill the perfume vial:unscrew the lid ofthe empty perfume vial to refill it yourself.
XFill the perfume vial with a maximum of0.5 fl. oz. (15 ml) of the desired liquid per-fume.
XScrew the lid back on to the vial.
!Only refill the perfume vial when you areoutside the vehicle. Otherwise, liquid perfumecould drip into the interior and contaminate it.
Always refill the empty refillable vial with thesame perfume. Otherwise, you might not ach-ieve optimum results from the perfume atom-izer.
Problems with the perfume atomizer
ProblemPossible causes/consequences andPPSolutions
The vehicle interior is notperfumed although theperfume atomizer is acti-vated.
The perfume vial has not been pushed into the holder as far as it willgo.
XSlide the perfume vial into the holder as far as it will go.
The perfume vial is not filled sufficiently.
XPre-filled vials:dispose of the empty vial.
XUse a new pre-filled vial.
XRefillable vials:refill the vial with a maximum of 0.5 fl. oz. (15 ml)of the same perfume.
The perfume atomizer is faulty.
XHave the perfume atomizer checked at a qualified specialist work-shop.
Ionization
Ionization is used to purify the air in the vehicleinterior and attain an improved interior climate.
The ionization of the interior air is odorless andcannot be perceived directly in the vehicle inte-rior.
You can switch ionization on/off using the mul-timedia system (Ypage 273).
Ionization can only be operated when the auto-matic climate control is switched on. The side airvent on the driver's side must be open.
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 out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh airthrough the air vents into the vehicle interior,please observe the following notes:
Rkeep the air inlet between the windshield andthe hood free of blockages, such as ice, snowor leaves.
Rnever cover the air vents or air intake grilles inthe vehicle interior.
128Air vents
Climate control