Mercedes-Benz C-Class 2014 Owner's Manual page 174

Problems with the pre-entry climate control
Problem
The pre-entry climate
control cannot be
switched on or has
switched itself off.
Remote activation of heating and ven-
tilation system
General notes
Remote activation is only available on vehi-
cles with the BlueEFFICIENCY package.
The driver's and front-passenger seat areas
can also be heated or ventilated when the
engine is switched off.
The starter battery must be sufficiently
charged before remote activation can be
switched on.
When the vehicle is heated, the following
functions are activated:
seat heating
R
rear window heating
R
exterior mirror heating
R
When the vehicle is ventilated, the following
functions are activated:
blower
R
seat ventilation
R
Operating the climate control system
Possible causes/consequences and M M Solutions
The charge status of the high-voltage battery is under the specified
minimum charge status.
Start the engine when the vehicle is at a standstill.
X
The internal combustion engine drives the electric motor. The
electric motor is operating as an alternator. The high-voltage
battery is charging.
Further information on charging the high-voltage battery
( page 416).
Y
The pre-entry climate control was started more than twice when
the engine was switched off.
Switch on the engine and let it run for more than ten seconds.
X
Try again to switch the pre-entry climate control on.
X
The difference between the interior temperature and the desired
temperature is too small.
Increase the difference between the interior temperature and
X
the desired temperature.
If you have activated ionisation using Audio
20/COMAND Online (see separate operating
instructions), it is activated together with the
remote activation function.
Activating/deactivating the remote
activation function
To switch on remote activation: push the
X
climate control symbol button on the key.
The air-conditioning functions are switched
on, for up to 10 minutes for heating and up
to 120 minutes for ventilation.
Remote activation switches off automatically
if:
the ignition is switched on, or
R
the engine is started
R
Seat heating (heating), seat ventilation (ven-
tilation) and ionisation remain switched on
after starting the engine.
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