Zooming in on one customer, Volkswagen tracks where they live, when they're home, when they work and at which hours. Hundreds of data points. 
This illustrates the scale and level of detail with which #Volkswagen spies on its customers. Their first reaction: lying that no sensitive information was leaked and the hack was sophisticated.
https://media.ccc.de/v/38c3-wir-wissen-wo-dein-auto-steht-volksdaten-von-volkswagen #38c3
Discussion
They could also triangulate employees of various secret (military) services.