The RS4’s 8.3in screen is controlled by twisting and pressing a dial between the front seats. It’s an easy system to use, thanks to its slick, intuitive menus, and you even get a touchpad for handwriting addresses. Satnav is included as standard and features dynamic route guidance, which takes traffic into account. The main highlight for audiophiles, however, will be the standard subwoofer-equipped hi-fi, which sounds terriffic.
Like the RS4, the C63’s infotainment system is controlled using a rotary dial. The 8.4in screen is crisp and clear, but the menus are confusing and the system can be slow to respond. Frustratingly, the optional (£2595) Premium Package, which comes with an impressive Burmester sound system, also brings with it a head room-robbing panoramic roof. Therefore, buyers will have to decide between good sound and rear passenger comfort.
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