Range Rover Evoque heater or heater

Hello, stand before the purchase of a new vehicle – my 2nd Evoque. At the 1st I had ordered a preheater, which however never fulfilled the sense of a preheater – i.e. – my windshield was never free or even approximate (except a hole in the size of a fist) at the lower end). 3 years terror with the car house did nothing – supposedly it works and is also not a heater but a Webasto preheater. Updates have not changed/repaired anything never – until then I have switched on the lawyer and they have refunded me the money (without giving any other reasons). Although I read constantly about these problems and also that for the RR Sport there are probably accessories for this heater, then to make a full-fledged heater. … but not for the Evoque.. Now the new one should be ordered – again the question.. is it a full-fledged heater or again only a heater??????? Range Rover claims the function would be the same as a full-fledged heater (I know it to the satisfaction of my previous vehicles Q5 – it was top!!) or just a heater. I have now been kindly provided with documents, what will be installed in the Evoque 2020, as of Dec. 2019: “Fuel-powered heater LR 115991 (or LR 1159949 – indoor additional air conditioning)” So, what is that now and by whom? (manufacturer was not said) Before I again spend years every winter morning about this. “Standheizung” must be annoyed and now it also costs about 1500,–€, I want to find out if I should order this accessory at all or just a heated windshield.. Does any of you have “experience” ? Would a lakeeeeeeeehhhhhhr great help – I want to send out the order next week !? Thank you!