sentences:  When Nissan's factory participation in the STC came to an end, Rosberg took a sabbatical from touring cars in 1999 and became involved in formula racing for the first time.Team Rosberg promptly took the opportunity to participate in the DTM again when it was recreated at the turn of the millennium.While it might have been expected to renew its association with Opel, it instead partnered with Mercedes-AMG.