The Volkswagen Concept D goes on public display on Sept. 16, 1999, at the Frankfurt auto show.
The concept luxury liftback -- envisioned by VW’s then-Chairman Ferdinand Piech -- featured a V-10 TDI diesel engine rated at 313 hp, a six-speed Tiptronic transmission, VW’s 4Motion all-wheel drive, air suspension with adaptive damping and bi-xenon headlamps.
The Concept D turned out to be a five-door prototype of the Volkswagen Phaeton luxury sedan that debuted in 2002.
The Phaeton was pulled from the U.S. in 2006 by then-VW brand chief Wolfgang Bernhard to stem losses in the region. The sedan reportedly required a $1.1 billion investment at the time.