Looking to put new stock 17" tires on the 300M and TireRack has 225/55R17, Load Range: XL, Serv. Desc: 101Y, UTQG: 400 A A for $107 each. Never heard of the company. Has only one put these on their car?
I haven't run them on either M but many years ago they were the only ones I could find in size for my old Saab. Back then they rode great and were very long wearing. Probably would not be afraid to give them a try on M.
Thinking a bit more, maybe Alan Wittstein might have run Vdeeds on his M.