Its designed to compete with this.
Benz no longer has lexus set in mind as their main competition. They're starting to step up into ultra luxury territory which is a very hard segment to capture. They have the Maybach which is in competition with the Roller Phantom and Bentely Flying Spur, but since Roller is releasing a less expensive convertible Benz wants to take a piece of the action in the Ultra luxury segment. The Car will not be badged as a Benz, it will be badged as a Maybach.