With the death of its Maybach brand, Daimler will be filling its ultra-luxury sedan portfolio with a version of the redesigned Mercedes-Benz S-Class called the S600 Pullman. While it's not totally clear if the car shown here is the new Pullman, we can easily see from these spy shots that this is not your run-of-the-mill stretch job.
Comparing this car to our firsthand shots of the 2014 S-Class, the extended wheelbase is instantly obvious, but looking closer, we also see that the rear doors, quarter panel and C-pillars are also unique to this vehicle. Oddly, those bits are also far different from the most recent stretched S-Class spy shots we've seen (although they could have just been an early engineering mule for this car). Whatever model is shown in these spy shots might not even be the king of the S-Class range, though, as there is also word of a three-row, six-passenger Pullman model in the works.