Mercedes-Benz 212 Sedan E-Class Service Manual page 118

The upper portion of the operating units is separated
from the display by a chrome bar and consists of a row
of pushbuttons. Above each button is the associated
function LED. In vehicles with three-zone comfort
automatic air conditioning, the AC operating unit also
contains a function key marked "REST". The row of
buttons is mainly used to operate functions that are
switched on and off.
A new button in the row is the "ZONE" button. Pressing
this button resets all the front passenger's custom air
conditioner settings to the driver's settings and the
associated LED indicator above the button goes out.
In vehicles with THERMOTRONIC, this also resets the
temperature settings in the rear passenger compart-
ment. If a setting for the passenger side or in the rear
is changed, this is shown by the lighting of the LED
indicator above the "ZONE" button.
THERMOTRONIC three-zone automatic air conditioning
– This printout will not be recorded by the update service. Status: 01 / 2009 –
Vehicles equipped with three-zone comfort automatic
air conditioning have a separate AC operating unit
installed in the rear compartment in addition to the
left / right separation. The rear AC operating unit is
installed at the end of the center console and is used
to regulate the temperature and air flow in the rear
compartment of the vehicle.
Rear AC operating unit
Introduction of the New E-Class, Model Series 212 Sedan
Climate control
P83.40-4297-00
P83.40-4296-00
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