Test Drive: Mercedes-Benz S550 Coupe and S63 AMG Coupe

Growling through Tuscany in the sculpted touring machines that are equal parts power and luxury

Designed for crossing continents at top speeds in high style, the Grand Tourer class of automobile is, in many ways, the true mark of a manufacturer’s ability. Hitting the optimal balance between a finely considered aesthetic, an interior that is suitable for long rides and a driving experience that lets you open up the car on straightaways while remaining nimble through winding roads is the …