2016 MERCEDES-BENZ C-Class SEDAN Blower

Overview of climate control systems
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
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
Rswitch on the defrost windshield function
briefly, if required
Climate control regulates the temperature and
air humidity in the vehicle interior. The interior
filter cleans the air, thus improving the interior
climate.
The "Cooling with air dehumidification" function
is only available when the engine is running.
Optimum climate control is only achieved with
the side windows and roof closed.
If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 149).
The residual heat function can only be activated
or deactivated with the ignition switched off
(
Ypage 137).
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 96). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
iThe integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. A clogged filter reduces the
amount of air supplied to the vehicle interior.
For this reason, you should always observe
the interval for replacing the filter, which is
specified in the Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
iIt is possible that the blower may be activa-
ted automatically 60 minutes after the Smart-
Key has been removed depending on various
factors, e.g. the outside temperature. The
vehicle is then ventilated for 30 minutes to dry
the climate control system.
Overview of climate control systems129
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences andMSolutions
The rear window
defroster 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 defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes
You can also temporarily deactivate the flow of
fresh air manually if unpleasant odors are enter-
ing the vehicle from outside. The air already
inside the vehicle will then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Switching on/off
XTurn the SmartKey to position 2in the ignition
lock (Ypage 146).
XTo activate: press thegrocker switch up
or down.
The indicator lamp above the grocker
switch lights up.
Air-recirculation mode switches on automati-
cally:
Rat high outside temperatures
Rat high levels of pollution (3-zone automatic
climate control only)
Rin a tunnel (vehicles with a navigation system
only)
The indicator lamp above the grocker
switch is not lit when automatic air-recirculation
mode is activated. Outside air is added after
about 30 minutes.
XTo deactivate: press thegrocker switch
up or down.
The indicator lamp above the grocker
switch goes out. Air-recirculation mode deactivates automati-
cally:
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 dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available with
3-zone automatic climate control on vehicles for Canada.
Once the engine is switched off, it is possible to
make use of the residual heat of the engine to
continue heating or ventilating the front com-
partment of the vehicle for approximately
30 minutes. The heating or ventilation time
depends on the interior temperature that has
been set.
Switching on/off
XTurn the SmartKey to position 0in the ignition
lock or remove it (Ypage 146).
XTo switch on: press the!rocker switch
up or down.
The indicator lamp above the !rocker
switch lights up.
The blower will run at a low speed regardless of
the airflow setting.
If you activate the residual heat function at high
temperatures, only the ventilation will be acti-
vated. The blower runs at medium speed.
Operating the climate control systems137
Climate control

Pre-entry climate control via SmartKey
General notes
The "Pre-entry climate control via SmartKey" function is only available in PLUG-IN HYBRID vehicles.
Before getting in, the driver's seat area or the whole interior can be briefly warmed or ventilated in
advance with the air from the air vents being pre-cooled.
The high-voltage battery must be sufficiently charged before "Pre-entry climate control via Smart-
Key" can be activated.
When the vehicle is pre-cooled, the following functions are activated if required:
RClimate control system
RBlower
RSeat ventilation
When the vehicle is pre-heated, the following functions are activated if required:
RClimate control system
RBlower
RSeat heating
RSteering wheel heating
RExterior mirror heating
RRear window defroster
If you have switched on the perfume atomizer or ionization using the multimedia system, these will be activated together with pre-entry climate control.
Activate the perfume atomizer (
Ypage 303).
Activate ionization (
Ypage 303).
Activating or deactivating "Pre-entry climate control via SmartKey"
Before "Pre-entry climate control via SmartKey" can be activated, you must activate the function via
the multimedia system (Ypage 303).
XTo activate pre-entry climate control via SmartKey: unlock the vehicle with the SmartKey or
KEYLESS-GO.
The climate control functions are activated for up to 5 minutes for pre-heating and pre-cooling.
To deactivate "Pre-entry climate control via SmartKey": "Pre-entry climate control via Smart-
Key" switches off automatically when the engine is started.
The following functions remain active after the engine is started:
RSeat heating (heating)
RSeat ventilation (ventilation)
RPerfume atomizer
RIonization
An activated "Pre-entry climate control via SmartKey" function can be deactivated using the rocker
switch (
Ypage 143).
Operating the climate control systems141
Climate control
Z

Problems with "Pre-entry climate control via SmartKey"
ProblemPossible causes/consequences andMSolutions
"Pre-entry climate con-
trol via SmartKey" can-
not be switched on or
has switched itself off.The condition of charge of the high-voltage battery is under the speci-
fied minimum condition of charge.
XStart the engine when the vehicle is at a standstill.
The engine powers the electric motor. The electric motor operates
as a generator. The high-voltage battery is being charged.
Further information on charging the high-voltage battery via:
Ra mains socket (Ypage 171)
Ra charging station (Ypage 174)
Ra wallbox (Ypage 173)
"Pre-entry climate control via SmartKey" has been started more than
twice with the engine switched off.
XSwitch on the engine and let it run for more than ten seconds.
XTry again to switch on "Pre-entry climate control via SmartKey".
Pre-entry climate control at time of
departure
Important safety notes
GWARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
General notes
The "Pre-entry climate control at departure
time" function is only available in PLUG-IN
HYBRID vehicles.
You can use the "Pre-entry climate control at
departure time" function to cool or heat the
vehicle interior if the engine is not running.
The "Pre-entry climate control at departure
time" function can be activated regardless of
whether or not the vehicle is connected to an
electric power supply. The condition of charge of
the high-voltage battery must be higher than the
specified minimum condition of charge, how-
ever.
When the vehicle is connected to an electric
power supply, priority is given to charging the
high-voltage battery to the specified minimum charge. "Pre-entry climate control at departure
time" is only activated subsequently.
The running time of the "Pre-entry climate con-
trol at departure time" function may be reduced
if:
Rthe vehicle is not connected to an electric
power supply and
Rthe high-voltage battery is not fully charged
With active "Pre-entry climate control at depar-
ture time" the condition of charge of the high-
voltage battery can be reduced, even if the
charge cable connector is connected.
When the vehicle is cooled, the following func-
tions are activated if required:
RClimate control system
RBlower
RSeat ventilation
When the vehicle is heated, the following func-
tions are activated if required:
RClimate control system
RBlower
RSeat heating
RSteering wheel heating
RExterior mirror heating
RRear window defroster
If you have switched on the perfume atomizer or
the ionization using the multimedia system,
these will be activated together with the "Pre-
entry climate control at departure time".
142Operating the climate control systems
Climate control