No 6: Susanne Klatten 
Net Worth: $17.4 billion
Source Of Wealth: BMW, pharma
|  | 
| Susanne Klatten and her husband Jan (R) attend the 43rd edition of the Sports Ball in Wiesbaden, Germany, in this February 2 2013 file photo. [Photo/icpress.cn] | 
Related: Forbes: Top 10 richest people in the world