A3 Mk2
| Components of auxiliary heater |
| -V6- = Combustion air blower -V6- |
| – | Voltage at combustion air blower -V6- in V (volts) |
| – | Speed is controlled by auxiliary heater control unit -J364- via voltage. |
| -V54- = Metering pump -V54- |
| – | Activation by auxiliary heater control unit -J364- is implemented in full-load mode at approx. 5.85 Hz (Hertz, stroke per sec.) with petrol version and 5.13 Hz for diesel version |
| – | Activation by auxiliary heater control unit -J364- is implemented in part-load mode at approx. 3.4 Hz with petrol version and 3.0 Hz for diesel version |