| I was just faced with the same decision as I had a good deal offered on a set of W211 rims with decent Pirelli 210 winter tires on them. I was at my mechanic's at the time, so he took one of my 210 rims off and mounted up the 211 rim. It fit no problem, but as you noted already the bolt length is different. My 210 lug bolts were too short, they wouldn't even thread into the hub so I think difference has to be more than just the 2mm. If you were prepared to buy a different set of lug bolts you should be ok.
When we mounted the tire up (on the front wheel) the wheel didn't extend out beyond the side of the car, so it appeared flush. Since we didn't have the right bolts I didn't get to turn the wheel through the full left-to-right range, so I couldn't judge clearance inside the tire well. But I can't see any reason why they wouldn't fit. |