I had the dash rattle too. Mine seems to be a bad dash pad that they're replacing as we speak. The weird thing is I've actually had a few rattles that went away on their own which great, but confusing. Otherwise no mechanical issues (needed a sunroof adjustment too). That's basically what I tell people, It's sort of like a corvette Sedan, you buy it for the drivetrain and it's a legend in it's own time but expect some fit and finish issues. Reliability can be relative. I was cross shopping X5 35d but those have serious carbon buildup issues. It seems like a lot of modern ICE engines are running into problems with increasing complexity keeping up with emissions. Looking at what 10 year old luxury cars are like to maintain now I think the simpler Tesla probably won't be too bad.