Calm down.
Who is supposed to be the norm if not someone who has actually owned such cars?
Quite a few of my friends in Germany and the Netherlands still own W220s, most of them in excellent condition, and once again: apart from rust remediation (which is significantly less necessary on the facelift models) and REGULAR maintenance (meaning filters, fluids, brakes), there were no major investments. The electronics work, the Airmatic works (and if it doesn’t, inexpensive replica parts from China are available — 90% cheaper than at an official Mercedes dealership — and the car works again).
Don’t put your words into my mouth. There’s no sugarcoating of reality here — just plain, hard facts.
The cars that ended up in the junkyard mostly had six previous owners and were usually kids who couldn’t afford proper maintenance but wanted to show off to the neighbors. Naturally, those cars fell apart — but any car would under such owners.
W140… my parents had a brand-new one in 1991, and I myself owned a 1994 model in 2004. A fantastic car — yes, complex — but as I said: personally, it gave me more problems than all three W220s and one C215 I owned combined.