Regrettably this article is only available in German as it contains information which is especially useful to Austrian consumers. Consumers from other EU Member States won't face the described situations.
Self-import of new cars from within the EU
It can pay off
Links
ÖAMTC: Eigenimport von Neufahrzeugen aus der EU (German)
http://www.oeamtc.at/portal/eigenimport-von-neufahrzeugen-aus-der-eu+2500+1358006
BMF: Fahrzeug-Eigenimport (German)
https://www.bmf.gv.at/zoll/uebersiedlung-fahrzeugeigenimport/fahrzeugeigenimport.html
EU Commission: Buying and selling cars
https://ec.europa.eu/taxation_customs/individuals/car-taxation/buying-selling-cars_en