From catalogue:
Auxiliary heating with remote control,
ideal in winter and in cold weather. When you
step into your vehicle, the windscreen is
already free of ice and the interior is already
pleasantly warm.

In other words, you can program the car to start heating let's say at 6:45 in the morning. Before you step in the car at 7:00 the car is already heated up. And it is seperated from the batery, so that it will not kill the battery.