1. Disconnect battery
2. Use a torx bit to undo the airbag formt he two holes int he back. I'm not sure ont he size, but I manaed to do mine with a regular allen wrench.
3. Get a breaker bar and a socket with the right size allen bit on it.
Break that sucker loose, unscrew it, and the wheel should pop right off easily. Make sure you make note of the steering position. I suggest you set it straight before taking it off.
IF you are putting in another wheel altogether, aftermarket or from another MB that will fit, installation should be the reverse. All in all, not too difficult, the allen bolt that holds the wheel on is the only tough one to remove, but with the right leverage and a breaker bar, its not too bad.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.