sentences:  Luhr's lack of results (he scored only one point) resulted in him returning to the American Le Mans Series, where he was considerably more successful, becoming 2008 LMP1 champion with the Audi R10.Team Rosberg has continued to race Audi cars in DTM, with 2012 as its most successful recent season.Edoardo Mortara won two of the ten rounds, helping the team to fourth in that year's championship.