The month of October and November, I had the opportunity to lease a S350D 4matic followed by a S500 for each month. Both variants were the long wheelbase versions and both were a free upgrade from the original Europcar's premium range ( Audi A6 45/50 tdi - E 350/400d ) since they had no vehicles available at the time. Though I didn't own them, I thoroughly drove them for the two months respectively. Here are a couple of pics of the S500
Location: Oberalp Pass, Switzerland