The BMW 4 Series is a coupe without too many compromises. And it needs to be as it faces stiff competition from the stylish new Mercedes C-Class Coupe and the all-new Audi A5. But how does it stack up? Mat Watson puts the BMW 4 Series through the full carwow testing procedure. Join him as he evaluates the car's performance and handling, scrutinises the interior quality, evaluates the iDrive infotainment system and sees how practical the car is. The model tested in the video is the 420d X-Drive.
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