2015 MERCEDES-BENZ C-Class SEDAN lights

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
0050
0050Solutions The indicator lamp in
the
005A button
flashes three times or
remains off. The cool-
ing with air dehumidifi-
cation function can
also no longer be acti-
vated using Audio 20/
COMAND (see the sep-
arate operating instruc- tions). Cooling with air dehumidification has been deactivated due to a
malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
General notes In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic mode functions optimally
when the "Cooling with air dehumidification"
function is activated. The "Cooling with air
dehumidification" function must be activated
manually in automatic mode. If necessary,
"Cooling with air dehumidification" can also
be deactivated.
If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi- cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can fog up more quickly. Therefore,
deactivate the cooling with air-dehumidifica-
tion function only briefly. Automatic control X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Set the desired temperature using the
0082 rocker switch on the front control
unit.
or
X Set the desired temperature using
Audio 20/COMAND; see the separate
operating instructions.
X To activate: press rocker switch 0058up
or down.
The indicator lamp above the 0058rocker
switch lights up.
X To switch to manual operation: press the
H rocker switch up or down.
or X Set the airflow using Audio 20/COMAND;
see the separate operating instructions.
or X Press the top or bottom section of the 008F
rocker switch.
or X Set the air distribution using Audio 20/
COMAND; see the separate operating
instructions.
The indicator lamp above the 0058rocker
switch goes out. 144
Operating the climate control systemsClimate control

In automatic mode, if you adjust the airflow or
air distribution manually, the indicator lamp
above the 0058rocker switch goes out. The
function which has not been changed man-
ually, however, continues to be controlled
automatically. When the manually set func-
tion switches back to automatic mode, the
indicator lamp above the 0058rocker switch
lights up again. Adjusting the climate mode settings
This function is only available with 3-zone
automatic climate control on vehicles for
Canada.
In automatic mode you can select the follow-
ing airflow settings for the driver's and front-
passenger areas:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUSE low airflow that is set slightly warmer and with less of a draft
X To set: set the climate mode using Audio
20/COMAND (see separate operating
instructions). Setting the temperature
Dual-zone automatic climate control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To increase/reduce: press the upper or
lower section of the 0082rocker switch.
or X Set the temperature using Audio 20/
COMAND; see the separate operating
instructions.
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). 3-zone automatic climate control General notes
3-zone automatic climate control zones
You can select different temperature settings for the driver's and front-passenger sides as
well as for the rear compartment.
Setting the temperature in the front com- partment using the front control panel
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To increase/reduce: press the upper or
lower section of the 0082rocker switch.
or X Set the temperature using Audio 20/
COMAND; see the separate operating
instructions.
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
Setting the temperature in the rear com-
partment using the front control panel X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Set the temperature with the 0082rocker
switch on the front control panel.
or
X Set the temperature using Audio 20/
COMAND; see the separate operating
instructions.
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). Operating the climate control systems
145Climate control

Setting the rear compartment airflow
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Press the top or bottom section of the !
rocker switch.
The Audio 20/COMAND climate control
menu opens.
X Select the "Synchronization" function in
the climate control menu; see separate
Audio 20/COMAND operating instruc-
tions.
The airflow setting for the front area is
adopted for the rear compartment.
Setting the rear compartment airflow
using the rear control panel X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To increase/reduce: press the upper or
lower section of the 0097/0095rocker
switch on the rear control panel.
The selected airflow level set is shown in
the rear-compartment display. Switching the synchronization func-
tion on/off
General notes Climate control can be set centrally using the
synchronization function. The temperature
setting is adopted for the front-passenger
side. For 3-zone automatic climate control,
the temperature setting is adopted for the
front-passenger side and rear compartment. Activating/deactivating Dual-zone automatic climate control
X Press the upper or lower section of the
0 rocker switch.
The indicator lamp in the 0rocker
switch lights up or goes out.
or
X Activate/deactivate the synchronization
function using Audio 20/COMAND; see the
separate operating instructions).
The synchronization function deactivates if
the settings for the front-passenger side are
changed.
3-zone automatic climate control
X Activate/deactivate the synchronization
function using Audio 20/COMAND; see the
separate operating instructions).
The synchronization function is deactivated:
R if the settings for the front-passenger side
are changed
R if the settings for the rear compartment are
changed Defrosting the windshield
General notes You can use this function to defrost the wind-
shield or to defrost the inside of the wind-
shield and the front side windows.
Switch off the "Windshield defrosting" func-
tion as soon as the windshield is clear again.
Activating/deactivating the defrosting
function for the windshield X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To activate: press the0064rocker switch
on the front control unit up or down.
The indicator lamp above the 0064rocker
switch lights up. The current climate con-
trol settings are deactivated. Operating the climate control systems
147Climate control

The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
i If necessary, the "Cooling with air dehu-
midification" function is activated. In this
case, the indicator lamp above the
005A button remains switched off.
X To deactivate: press the0064rocker
switch up or down.
The indicator lamp above the 0064rocker
switch goes out. The previously selected
settings are restored. Air-recirculation
mode remains deactivated.
or
X Press the top or bottom section of the 0058
rocker switch. Defrosting the windows
Windows fogged up on the inside X
Activate the cooling with air dehumidifica-
tion function with the 005Arocker switch.
or X Activate the "Cooling with air dehumidifi-
cation" function via Audio 20/COMAND;
see the separate operating instructions.
X Switch on automatic mode using the 0058
rocker switch.
X If the windows continue to fog up, activate
the "Windshield defrosting" function using
the 0064 rocker switch.
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Activate the windshield wipers.
X Switch on automatic mode using the 0058
rocker switch. i
If you clean the windows regularly, they
do not fog up so quickly. Rear window defroster
General notes The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Press the 006Crocker switch up or down.
The indicator lamp above the 006Crocker
switch lights up or goes out. 148
Operating the climate control systemsClimate control

Problems with the rear window defroster
Problem
Possible causes/consequences and
0050
0050Solutions The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged.
X Switch 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-recircula-
tion mode
General notes You can also temporarily deactivate the flow
of fresh air manually if unpleasant odors are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To activate: press the0072rocker switch
up or down.
The indicator lamp above the 0072rocker
switch lights up.
Air-recirculation mode switches on automat-
ically:
R at high outside temperatures
R at high levels of pollution (3-zone automatic
climate control only)
R in a tunnel (vehicles with a navigation sys-
tem only)
The indicator lamp above the 0072rocker
switch is not lit when automatic air-recircula- tion mode is activated. Outside air is added
after about 30 minutes. X
To deactivate: press the0072rocker
switch up or down.
The indicator lamp above the 0072rocker
switch goes out.
Air-recirculation mode deactivates automati-
cally:
R after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated Activating/deactivating the residual
heat function
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
compartment of the vehicle for approximately
30 minutes. The heating or ventilation time
depends on the interior temperature that has
been set. Operating the climate control systems
149Climate control

Switching on/off
X
Turn the SmartKey to position 0in the igni-
tion lock or remove it (Y page 157).
X To activate: 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 activated. The blower runs at medium speed.
X To deactivate: press the!rocker
switch up or down.
The indicator lamp above the !rocker
switch goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops Perfume atomizer
Operating the perfume atomizer G
WARNING
If children open the perfume vial, they could
drink the perfume or it could come into con-
tact with their eyes. There is a risk of injury. Do not leave children unsupervised in the vehicle.
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. H
Environmental note Full perfume vials must not
be disposed of with house-
hold rubbish. They must be
collected separately and
recycled to protect the envi-
ronment. Dispose of full perfume vials
in an environmentally
responsible manner and
take them to a special waste
collection point. 0043
Perfume lid
0044 Perfume vial
The perfume atomizer helps to improve driv-
ing comfort.
Using Audio 20/COMAND, you can:
R switch the perfume atomizer on and off
(see separate Audio 20/COMAND operat-
ing instructions)
R regulate the perfume atomizer (see the
separate Audio 20/COMAND operating
instructions)
The following conditions can affect your per-
ception of the perfume intensity:
R operating mode of the climate control sys-
tem
R interior temperature
R time of year/day
R air humidity
R physiological condition of occupants, e.g.
fatigue or hunger
The perfume atomizer can only be operated
when the climate control system is switched
on and is only active when the glove box is
closed.
The perfume atomizer is provided with a pre- filled perfume vial. You can also choose froma variety of filled perfume vials and an empty
vial which you can fill yourself. 150
Operating the climate control systemsClimate control

The Start/Stop button can be removed from
the ignition lock. Then, you can insert the
SmartKey into the ignition lock.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
R you will not be able to switch on the ignition
with the Start/Stop button.
R you will not be able to start the engine with
the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the but- ton on the front door (Y page 87), you can
continue to start the engine with the Start/
Stop button.
You do not have to remove the Start/Stop
button from the ignition lock when you leave
the vehicle. You should, however, always take the SmartKey with you when leaving the vehi-
cle. As long as the SmartKey is in the vehicle:
R the vehicle can be started using the Start/
Stop button
R the electrically powered equipment can be
operated
The engine can be turned off while the vehicle is in motion by pressing and holding the
Start/Stop button for approximately three
seconds. This function operates independ-
ently of the ECO start/stop automatic engine
switch-off function.
SmartKey positions with the Start/Stop
button When you insert Start/Stop button
0043into
ignition lock 0044, the system needs approx- imately two seconds recognition time. You
can then use Start/Stop button 0043.
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light up. If an indicator lamp does not go out afterstarting the engine or lights up while driving,
see (Y page 285).
If Start/Stop button 0043has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
X Insert Start/Stop button 0043into ignition
lock 0044.
X To switch on the power supply: press
Start/Stop button 0043once.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button 0043twice when
in this position
X To switch on the ignition: press Start/
Stop button 0043twice.
The ignition is switched on.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button 0043once when
in this position 0087
Start/Stop button USA
0085 Start/Stop button Canada 158
DrivingDriving and parking

R
you engage reverse gear R.
R you move the transmission out of position
P.
R you unfasten your seat belt or open the
driver's door.
R the vehicle starts to roll.
R the brake system requires this.
R the temperature in the vehicle interior devi-
ates from the set range.
R the system detects moisture on the wind-
shield when the air-conditioning system is
switched on.
R the battery's condition of charge is too low.
Shifting the transmission to position Pdoes
not start the engine.
Deactivating/activating the ECO start/
stop function X
To switch off: press ECO button 0043.
Indicator lamp 0044goes out.
X To switch on: press ECO button 0043.
Indicator lamp 0044lights up.
If indicator lamp 0044is off, the ECO start/stop
function has been deactivated manually or as the result of a malfunction. The engine will
then not be switched off automatically when
the vehicle stops.
Selecting drive program S+deactivates the
ECO start/stop function. If you press ECO
button 0043, the ECO start/stop function is
activated. 162
DrivingDriving and pa
rking