If that's the case, wouldn't he just be a representative attending press conferences to talk on behalf of the whole BMW group? There is no way he could be responsible in fesign direction of every brand.. Rolls Royce, Mini and BMW will have their own direction in which they will need to go.
2000 Audi A8 SWB Silver/Black
1992 BMW 525iT/5 White/Blue [MPars, HIDs, cargo net]
1989 525i [scrapped]
1995 BMW 318i DASC [sold]