I've done this before on my 79 240D...

It CAN be a one person job, though it IS a REALLY tight bolt...

Use a breaker bar that's just an inch or 2 longer than the outer edge of the wheel rim. Use a socket entender to bring the breaker bar to just SLIGHTLY higher than the wheel rim. Use left hand to "strong arm" the wheel stationary while using right hand to turn breaker bar (positioned near left hand) (If I remember correctly, I MAY have actually stuck my leg through the lower part of the wheel rim to gain leverage...??...didn't have a helper nearby, and didn't want to wait!)

It takes quite a bit of strength. (I tried my Craftsman AC- electric impact gun and it did not have enough power to loosen it)

Good luck!

J.G.