You should study the bearing part diagram on realoem.com you may need to wd40 soak some nuts. Do one side at a time of course. Of course you need a diy must be one for e53 if not e70. I would not do anything I wasn't.confident doing with the right tools. You may need to study it this weekend and put it off.til next if you need to be better prepared.for the surgery. Realoem diagram seems to indicate it.is pretty easy so I think the biggest problem may be frozen nuts. Hate frozen nuts ;-)