I have not mislead anyone that they will not experience any problems, they are a big brother to the E46.
I mentioned window moldings & vapor barriers, I cannot recall or list everything.
I think the window regulators are a bit more hefty than the E46?? At least I do not know anyone who has had issues.
Ignition switch is probably no different than the E46 as far as issues?
Forgot to mention same or worse power steering hose problems.
But at least I do not have any oil leak or air filter housing issues as I have an S62! I think the S62 makes up for any short comings that the E39 may have!
My point the chassis is a very tight, well designed and safe chassis.
But it is still a BMW so expect the nit picky problems.