America's Tire is pretty good but if I buy Michelins, I get them at Costco. They're in bed with each other. Also, keep in mind Mercedes needs Euro-bead shaped wheel weights and not too many tire shops have them. I miss the Exaltos myself, they are smoother and lower in rolling resistance than the Bridgestones I have now. Heck, the Pilot Exalto A/S is probably what the Energy MXV4 should have been - it's one of 2 tires Michelin makes that is both Green X AND Radial XSE.
Wheel Works is an arm of Firestone but they aren't limited to selling just Bridgestone/Firestone/Prime Well.