Climate control
100
Comfort
Introduction of the New E-Class Coupé, Model Series 207
b
Climate control systems
Two climate control systems are available for model
series 207:
• THERMATIC two-zone automatic air conditioning
as standard equipment
• THERMOTRONIC three-zone comfort automatic air
conditioning as special equipment, with code (581)
Both climate control systems combine automatic
heating, ventilation and cooling systems.
With the two-zone automatic air conditioning the
temperature for the driver and front passenger sides
can be regulated independently. With the three-zone
comfort automatic air conditioning the rear AC oper-
ating unit can be used to set the temperature for the
rear passenger compartment separately.
Both systems feature air recirculation and a combina-
tion filter with fine filtration function as standard.
The main improvements to the climate control
systems are:
• The passenger compartment ventilation with
regard to draft-free ventilation, low noise
emissions and effectiveness
• The design and layout of the operating units with
regard to clarity, ergonomic handling and harmoni-
zation with the interior styling
• The optimized response behavior of the system
functions
Control and sensor systems
The automatic function regulates the air flow, air
distribution and interior temperature automatically.
The actual values of the interior temperatures are
sensed by one ventilated sensor in the overhead
control panel, one near the ignition lock and also by
two air outlet temperature sensors on each side in the
air stream of the side and footwell vents. Depending
on various parameters such as the outside tempera-
ture, the coolant temperature and the above-
mentioned sensors, the appropriate target outlet
temperature is calculated. If significant deviations are
found, the temperature is corrected.
The standard-equipment sun sensor on the instrument
panel near the windshield is a dual sensor that regis-
ters the intensity and angle of incidence of sunlight on
the vehicle. According to the intensity, the registered
values are also used for the control loops of the
climate control. If the sunlight falls on one side only,
an appropriate temperature difference is set between
the left and right target temperatures.
The three-zone comfort automatic air conditioning
includes a pollutant sensor for calculating the
pollutant concentration; the values measured are
used to close the air recirculation flap and shut off the
outside air supply completely if necessary.
A dew point sensor in this variant allows the refrig-
erant compressor to be controlled specifically
according to requirements.
– This printout will not be recorded by the update service. Status: 01 / 2009 –
