After years of lurking and consideration, I have finally joined the club for the first time

2004 X5 3.0i, 100k miles, single-owner CA car. The seller handed over a binder with invoices and receipts for every little bit of maintenance—almost all at BMW Service Centers—performed over its life. She needs a little TLC here and there but drove 170 miles home smoothly and effortlessly. Cooling system overhaul will be the first project.

Let the fun/pain begin.