This is the barely known Mercedes W1, or the XMS. As you all know, the story of Santa Claus has it's roots in Germany (although he wasn't so nice - legend has it that presents were left for good children and then the bad children were beaten and stuffed into the empty sack!) Who better to trust the maintenance of a flying sleigh to other than MB?! Here is a better picture of the sleigh going in for an A service.