I chopped in my E60 M5 v10 in for an 08 C63 AMG best choice I ever made with the bimmer. It seemed to love the BMW dealership with its niggly electrical gremlins but did sound beautifull singing its V10 out through the pipes. A friend had his gearbox destroy itself on his X5 but was fixed under warranty. HE also had the dreaded water leak in the engine.