That depends on how many fingers you want to have after.
Reminds me of working in the electric utility industry; the joke was you could tell how long someone had been doing hot work by giving them a high five and seeing how many digits were reciprocated.
To go along with JFENG, my old E34 540 had a running rule: ~1k in upkeep a year. Pay it now or pay it later with extra. I think I spent ~12-14k on that car over ~7 years. Trans went, crank rear main seal blew, untold suspension components, motor mounts, etc. Parts just got old and wore out, which led to 'hard' parts failing.
Even my much more modern W212 2014 E550 needed some love; it blew a coolant line one morning, so I spent the cash to replace all the cooling lines and the expansion bottle. Even with an indy, that was still a 6k job, since it was engine-out for the turbos. Brakes were another 2k (front + rear). I'm probably ~9k all in after 4 years of ownership.
In comparison, my 2011 Ford Flex Ecoboost and 2013 Subaru WRX Hatch needed nothing from new to 100k miles aside from tires, fluids, wipers, and brakes. They were great. So perhaps it's more a German car thing?