BMW unleashes its engine making sorcery to create the most powerful diesel unit in the market - and fits it in the new X5.
The xDrive is a marketing name for BMW's intelligent all-wheel drive system. But it could mean a whole load more, as we find out.
![BMW M Series X5 M50d 3.0 [Base model] (A) Review](https://media.i-sgcm.com/article/articleImages/thumbnail/31826/31826_thumb.jpg)
