Josef:
I think the owner is "muc.collector" on instagram
How do you know?
Driver (owner?) is 52 years old and was caught by the fire with his son in the car. They both escaped unharmed.
Car had only run for 70 km...it was brand-new. 
Since the car had M-GC license plates, I still suspect it was either someone from the Geiger (US car dealer Munich) family or he got the car for a test-ride (maybe a very good customer who wanted to try it first before he buys it?). Or, another possibility: He bought it from Geiger Cars used and drove it over to his home (Rosenheim?) with the Geiger Cars Munich license plates.
Did that muc.collector guy post photos of the burned car on Instagram? It is a private account and I don't want to subscribe.
No matter who owns the car, it seems it was a brand-new one. What a shame.
Maybe a factory issue? Or maybe it was damaged during transport?
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RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Audi R8 V10 Plus (2016), Mercedes E63 S AMG Edition 1 (2018), Mini JCW (2015)