Mercedes has fitted its age-old 3.0-litre V6 diesel to the GLC crossover, a car that usually comes with the rattly 2.1-litre four-cylinder. Feels it, too. Sensible money sticks with the four, but the six is worth it if budget allows. Turns the GLC into a luxury good. Predictably, it’s rather good. More cylinders means more speed and more refinement. Also, more money – £5k-ish over
the 250d. Six pairs well with 9spd auto – bags of torque mean you’re rarely caught out. Drives as well as the 4cyl car, which is quite.