2015 Audi Q7 to Become the Company's First Diesel Plug-in Hybrid
5 Dec 2014, 14:35 UTC · By: Mihnea Radu / Peugeot, Citroen, Volvo and Mercedes have all built hybrid diesel powertrains, proving that you really can combine oil-burners and electricity into one even more efficient package. Now, Audi wants t...