Are you sure the issues are questionable? If you suspect they may be trying to overcharge you, why not go and get a second opinion on those exact issues they've pointed out?
From my experience a more paranoid-like, thorough approach to euro maintenance (specifically preventative maintenance) always pays off in a long run, especially if you want your BMW to perform on a road like a BMW rather than a Kia or similar
On a 2009 car majority, if not all wear items in drivetrain and suspension should have been swapped out by now- there are a lot of things you don't want to wait for to be broken in order to be replaced.
All in all, on majority of new-to-me 5+ year old cars, I would treat no recommendations/suggestions as "she'll be right mate" attitude, with more suspicion than a list of recommendations worth a few thousand dollars worth of work done.
An example or list of things of what those guys suggested you do on your car would be nice.