The mystery man who interrupted the German Grand Prix by going walkabout was a disgruntled former Mercedes employee, it has been revealed.Following his eventual detention by the circuit security team, the mystery man has been revealed as a 47-year old Frenchman who, in his own words, wanted to protest against his dismissal by Mercedes-Benz. He claimed he had been dismissed on 'health grounds' having worked for the company for 22 years. The raincoat he wore had a protest message, in French, written on it for the benefit of the television cameras which picked up his meanderings, which included crossing the circuit between the Clark and Ost Kurves.