Where are you located? I have a 2018 X1GT I purchased new. It's white, kids room, front BBQ, hot water, etc. I did not go with the Webasto heater. I installed a Propex HS2800. It will keep the entire sleeping area including the kids room comfortable in the dead of winter. I've camped several time in sub-zero temps. I submitted a forum writeup for the intall.
Let me know if you are interested.
Let me know if you are interested.