"It was definitely inappropriate" - Nico Rosberg
According to Bild newspaper, it was Red Bull who alerted the FIA to Rosberg's breach
Mercedes drivers have a slightly different view on Massa's move to Williams team.
The 28-year-old acknowledged that the 2014 rules revolution is a "huge opportunity" for a works outfit like Mercedes.
Niki Lauda and Toto Wolff do not agree with Brawn's decision