I'm considering a 5-series for longer trips and/or when headed into heavy traffic. I'll still have my 330Cic for fine weather. My preferences for budget and mileage seem to rule out anything newer than about a 2015, and likely also anything much older than most 2011's. I've never had an xDrive, although I did have an X5 3.0i in the early 2000s. Does an xDrive behave like an older (2001) X5, at least in terms of 4WD, or is it more complicated than that?

What should I be looking out for in one of these? Hopefully nothing like the failure-prone window regulators in the E46's, for example.