[wagonswede]

From my understanding only diesels of this generation have aux heaters which can be repurposed to parking heaters. But someone please correct me if i am wrong.

 

[wagonswede]

Some petrol engines do have parking heaters, yes (as does mine) but they are programmed as parking heaters from start and not auxiliary heaters. The reason being petrol engines don't need auxiliary heaters.

 

[wagonswede]

Vehicles with parking heaters also have a webasto sticker on the underside of the bonnet to indicate this. easiest way to check.

 

[wagonswede]

Volvo uses a device from Webasto for remote start of the heater, Telestart T91(R), but for mobile start you need another Webasto device, Thermocall TC4 but it's 3G. There is no 4G solution readily available.