The soon-to-be-former CEO has been with VW since 2000, succeeding Ferdinand Piech who stepped down in 2002. Supposedly, Pischetsrieder will be taking on "special assignments" after his departure.
We're unsure about why this move is taking place, so we'll be scouring the web for rumors and conjecture in the meantime.
[Source: Automotive News – Sub. Req.]