The Mercedes E-Class is a mixed bag. It's very well equipped and has a great range of engines, from efficient diesels, plug-in hybrids to punchy petrols. It's pretty quiet and comfortable on the motorway but the ride isn't perfect around town and, while the boot is big, the rear passenger compartment isn't, relative to its rivals. Overall, we'd say the BMW 5 Series is a better car to drive, has a better infotainment system and it's better built inside.