SHEER luxury more than gristly off-roadiness is the hallmark of the big SUV wagons these days, and nothing epitomises this transition than the BMW X5. This latest hot version of the 3.0-litre diesel, wearing twin turbochargers, is so far removed from the old, slow and smelly 4WD of old that it’s hard to believe that such thing existed. The 40d forces a change in mindset if you didn’t like diesels, you will now.