Comfort of the highest magnitude. I basically want the car to feel not like I am a passenger in it, but that it is merely an extension of myself.
A quiet interior. I want to hear as little noise from the engine, the tires on the ground, the wind, etc., as possible.
The smoothest ride money can buy.
A very high likelihood that my car will not see the inside of a shop (excluding routine maintenance, oil changes, etc.) for, say, 150K miles.*
*I’ve been told from more than one source, one of whom actually owned one, that high-dollar luxury autos such as BMWs and Jaguars are so over-engineered that they’re prone to frequent breakdowns and spend a lot of time in the shop.
With these conditions, what’s the best ride money can buy?
Jaguars are typically a little more problematic. But I’m on my third BMW now and none of them have ever needed unscheduled service excluding one flat tire and one cracked windshield.
And I do agree, for your requirements, a Maybach is the answer. Preferably with a driver, so you can take advantage of the reclining back seats.
Infiniti J30 (up to, I think 1995). Unfortunately, while a great low-maintenance vehicle at first, once it hit about 300K the visits to the repair shop grew more frequent.
Also, the manufacturers did not foresee supersize drinks, so the cup-holders, while adequte at first, became obsolete, at least as cup-holders. The feature where you could connect your cell phone also didn’t move on to the next iteration of cell phones (I had a '93).
Another possible downside: One car reviewer said it looked like a Klaes Oldenburg potato. (I thought it was cute.)
Other than that, though, if you could find one that, say, somebody had kept in a garage and never driven since the early '90s, it would fulfill all your requirements.
The Infinitis of today are just tricked-out Nissans, but in the old days, they were special.