Recently, a new version of the Mercedes S Class was spied during testing on the Nurburgring race track in Germany. Apparently, Mercedes S Class XL is considerably longer than the regular version of the high-end luxury saloon. Reportedly, the XL Mercedes S Class is around 6 meters long and it can seat up to six passengers, thanks to a 2+2+2 seating configuration. The S Class XL is going to be even longer than the current long wheelbase version of Mercedes' flagship sedan. We'll have more details and images of the Mercedes S Class XL as soon as they're available.