In 2005 he returned to racing in the inaugural season of the Grand Prix Masters formula for retired F1 drivers .
In 1996 , as thanks for his years of service to Williams , Patrese was invited to test the team 's latest F1 car .
In 2005 Patrese returned to racing in the inaugural season of the Grand Prix Masters formula for retired F1 drivers .
In 1996 , as thanks for his years of service to Williams , Patrese was invited to test the team 's latest F1 car .