Well for me the center console, and the interiro globally, evokes a cheaper version of the W221 S-Class.

For the exterior, the actual Chairman is: front W210, side W140 and rear American 2000's Buick or American Ford.

This is the face-lift model, the original was the same as the Lexus LS400: 100% W140... But with a very SsangYong interior though

It is based on the W124!! But with more modern Mercedes' motors and automatic gearbox.
There is also a quite luxurioux Extra-Long Wheelbase.