Do we know of any specific designs attributed to him? The only thing i found out from googling him was about the Concept CS which is very much evident in the current F10 5 series. He left to go to Mercedes for a while, but is back.
I am just curious because the most significant design person BMW has had would probably have to be Chris Bangle who stepped into the top role after designing the Z9. I remember how much push back to his "Bangle - butt" on the 7 series while eventually a number of car makers embraced this design element and eventually even BMW refined the design to be quite attractive.