Control Assembly: Description and Operation

A/C Control Head -E87-, Functions


CAUTION!
- Before working on the electrical system, obtain radio security code and disconnect battery Ground (GND) strap.
- When reconnecting battery, always check operation of vehicle equipment such as radio, clock, and power windows.







1 - Windshield defrost button
2 - Blower speed display
- In automatic operation -8- a midrange is displayed independent of actual blower speed.
3 - Ambient (outside) temperature display
- Display will not change when road speed is below 15 km/h (9.5 mph) and coolant temperature is above 70 °C (158 °F). Under these conditions, the actual measured value is not displayed because engine heat will adversely affect reading.
4 - Windshield defrost display
5 - Air recirculation display
6 - Air distribution display
- Function: "air flow to footwell" is selected and indicated when pressing button -14-
- Function: "air flow to upper body" is selected and indicated when pressing button -15-.
7 - Selected temperature display
- To change display from Celsius to Fahrenheit and vice versa:
- Press and hold button -11- and press button -9-.
- Selected temperature scale appears in display.
8 - Operating mode display
"AUTO": Automatic mode
- In automatic mode, the Climatronic maintains the selected interior temperature automatically. With this setting, the air outlet temperature, blower speed and air distribution are controlled automatically.
"ECON": A/C system off
- In ECON mode only the compressor is switched off. Heating and A/C operation continues to be controlled automatically.
"OFF": Complete system is switched off
- Select by pressing and holding "decrease blower speed" button -17- until "OFF" appears in display.
- In this mode, all air flaps remain in the last set position before switching off. (Setting should only be used in the case of a malfunction).
9 - Automatic operation button
10 - Instrument panel interior temperature sensor -G56- and interior temperature sensor fan -V42-
- Installation location on right-hand drive vehicles.
11 - "ECON" button
- In ECON mode only the compressor is switched off. Heating and A/C operation continues to be controlled automatically.
12 - "Warmer" button
13 - "Cooler" button
14 - "Air flow to footwell" button
15 - "Air flow to upper body" button
16 - "Increase blower speed" button
17 - "Decrease blower speed" button
- To switch off A/C system, press and hold button until "OFF" appears in display.
- In this mode, all air flaps remain in the last set position before switching off. (Setting should only be used in the case of a malfunction).
18 - Recirculating air button
19 - Instrument panel interior temperature sensor -G56- and interior temperature sensor fan -V42-
- Installation location on left-hand drive vehicles.