BMW released a mysterious teaser video of an X6, which is expected to be a super diesel version allegedly called the X6 M50d. It get the same tri-turbo diesel engine that will also power the 5-Series M550d super diesel. BMW’s high-power diesel engines offer a good compromise between performance and excellent fuel economy. Based on the teaser video, the car will also get slightly revised styling as well.

Watch the teaser video after the jump.