Attention All: New Technical Service Bulletin
There is a recently released TSB on the subject of other services to be performed when tires are rotated.
While it doesn't directly address the important issue of rotating the air in tires it does discuss the need to replace that air with helium. The process involves purging the air in the tires with a vaccum pump and them replacing that air with helium. It has something to do with lightening the vehicle which will increase fuel economy and more significantly decease the wear and tear on the ML transmissions altogether.
Of course I made this up.