Even so, I feel pretty chipper. But I’m struck cold to the core when the very nice people at BMW hand me the keys to a new 320d M Sport. I can barely utter the phrase, ‘Surely some mistake ...

Even with the tide turning against diesel, the 320d is expected to represent half of all 3-series models sold in the UK. The 3 Series is as important to BMW as it has ever been, and there is added ...