In-car navigation HUDs may be safer than dash systems, but, let's face it, they can't yet claim to be pretty. Enter Garmin's modular K2 infotainment system, which has been specially modified to suit the futuristic look of Mercedes' new 4.7-liter bi-turbo V8 Concept S-Class Coupé. Gone are the flat designs of old, replaced with Garmin's advanced 3D city models, which include