BMW M teasing on the X6 M with diesel engine?

There had already been some rumors about the upcoming of a new X6 M driven on diesel. Well, it seems like the rumors are about to become real facts as BMW has started teasing a new X6 M on YouTube.
    
The video doesn’t show much but it’s “Step 1” to what should be the unveiling of the X6 M Diesel. It shows a X6 M driving on road at high speed, demonstrating M’s cars characteristics but the headlights and the identification of the car at the back have been blurred, in order to hide the truth about the new car.

Rumors have been talking for a while about the upcoming of the first diesel unit to M’s lineup. The rumored X6 M550d is reported to be getting a triple-turbo six-cylinder 3.0 litre diesel engine with 373kW (500hp) and more than 800Nm of torque.

To discover more we will have to wait for the next step. Until then here is the first step.