Geneva show-bound diesel-electric concept previews next generation of Audi estates inside and out. Audi has revealed the new Prologue Avant ahead of the one-off concept car's debut at the Geneva motor show next week. The company's successor to the well-received Prologue coupe, which was first seen at last year's Los Angeles motor show, has been created to show how its latest design language will be applied to future estate models, most notably the next A6 Avant.
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