Bought my M3 in May in Switzerland, first long drive yesterday, going to Scotland.
When stopping at our first Tesla supercharger in France, I could not remove the big double plug (sorry I don't know how it's called) from the charger so I took the smaller one (picture in link below) that looked like the one I have at home.
Funny thing is that I could not insert it into my M3, because of the pointy thing on the central pin, I don't have this on my M3. A guy coming with his model X from Belgium could insert it.
What is this connector and why I cannot use it?
I finally managed to charge my car with the big double plug, I just had to pull harder on it, I thought it was locked.
My charging experience has been great so far, these things are FAST! And the on-board Tesla route planner is quite accurate.