Control Module HVAC: Description and Operation
Front A/C Display (E87) with Climatronic Control Module (J255)
• For the Climatronic with 2-zone temperature control there is only one Front A/C display control head.
• The Front A/C display control head must be coded for the corresponding version.
• In vehicles without seat ventilation, covers are installed instead.
1 Defrost Button
2 Temperature Regulator, Left
• Change front left temperature setting by turning.
3 AUTO Button
• In automatic mode the Climatronic maintains the selected interior temperature automatically. With this setting the vent air temperature, the blower speed and the air distribution are controlled automatically.
4 Air Conditioning Synchronization Button
• This button transfers all driver's air conditioning settings to the other seats.
5 Display For Diagnostic Function
• The display appears in the case of communication between the vehicle and vehicle diagnostic tester.
6 Display Of Selected Interior Temperature, Left Side
• Can be changed from Celsius to Fahrenheit and vice versa.
7 Button For Lowering The Blower Speed
8 Blower Speed Display
• In automatic operation the actual blower speed is displayed.
9 Display Of The "Auto" Function
10 Parking Heater Display
• The display appears when the parking heater is switched on.
11 Air Distribution Display
• Displays the front air distribution setting.
12 "A/C" Display
• If the AC button is deactivated, the A/C compressor is set to almost zero delivery. If the AUTO button is activated, the heating and ventilation mode continues to be controlled electronically.
13 Display Of The Residual Heat Function
14 Button For Increasing The Blower Speed
15 Display Of Selected Interior Temperature, Right Side
• Can be changed from Celsius to Fahrenheit and vice versa.
16 OFF Display
• Illuminates when the heating and A/C function is switched off via the 18 button.
17 Recirculating Air Mode Button
• Press the button for recirculating air function to prevent polluted air from entering interior.
• Setting indicated by the LED.
• Recirculating air is switched on automatically under the following conditions:
• When the windshield washer system is operated.
• When Air Quality Sensor (G238) is activated.
• When the reverse gear is engaged (this function is only active for 2 minutes after the engine is started).
• Blower speeds on Front A/C Display Control Head (E87).
• Front A/C Display Control Head (E87) OFF.
18 OFF Button
• Press the OFF button to turn off the heater and A/C.
19 Temperature Regulator, Right
• Change front right temperature setting by turning.
20 Push Button For Rear Window Defroster
• Rear window defroster remains on for 4 to 20 minutes, depending on exterior temperature.
21 Right Seat Heater Button
• The seat heater has 3 settings. The LED indicates the current setting.
• If no LED is illuminated, the seat heater is switched off.
22 Right Seat Ventilation Button
• The seat ventilation has 3 settings. The LED indicates the current setting.
• If no LED is illuminated, the seat ventilation is switched off.
23 REST Button
• When residual heat function is switched on the residual heat of the engine is pumped by a coolant pump to the heater core.
24 Air Distribution Button
• Pressing the button regulates front air distribution.
• The air distribution display shows which setting is active => [ (Item 11) Air Distribution Display ].
25 AC Button
• If the AC button is deactivated, the A/C compressor is set to almost zero delivery. If the AUTO button is activated, the heating and ventilation mode continues to be controlled electronically.
26 Left Seat Ventilation Button
• The seat ventilation has 3 settings. The LED indicates the current setting.
• If no LED is illuminated, the seat ventilation is switched off.
27 Left Seat Heater Button
• The seat heater has 3 settings. The LED indicates the current setting.
• If no LED is illuminated, the seat heater is switched off.
Climatronic Temperature Unit, Switching
The temperature display unit can be switched between Celsius and Fahrenheit in the setup menu of the Infotainment system.
- Press the SETUP button in the Infotainment.
- Touch the SYSTEM button.
- Touch the UNITS button.
- Select the desired unit.