Totally missed this thread, and hoping to provide insight if you haven't had your MX tinted yet. We are one of the few companies in the industry with the ability to tint the front windshield of the MX.
We carry Spectra Photosync IRD exclusively, which is the top heat and IR blocking window film in the industry. There's lots of info on the MX, MS, & M3 forum about Photosync and our services. The IRD line of Spectra Photosync came out last year and improved upon what was already the best heat rejecting film in the industry. Spectra PhotoSync IRD® | Prestige