Mercedes motorsport boss Toto Wolff says his relationship with former team principal Ross Brawn is "intact" following comments made by the latter in a new book.Brawn said he didn't feel he could trust the Mercedes hierarchy, including Wolff and Niki Lauda, which hastened his exit from the team.Related StoriesBut Wolff...

Ross Brawn says in a forthcoming book that a lack of trust in the Mercedes hierarchy ultimately forced him to quit the Formula 1 outfit.Brawn sold his 2009 championship-winning team to Mercedes, which kept him on as team principal. Toto Wolff (at right with Brawn, above) and Niki Lauda were...