Who is Gonna Buy A New Jeep Grand Wagoneer For the MacIntosh Stereo?

No one.

@larsman  "Does it have a tube engine?" was the best line.

For me, I wouldn't buy one unless (i) it was Trump endorsed, and (ii) the other cars at a traffic light could hear the deep base booming through the doors..

Those blue meters do a lot of selling for Mcintosh.  I own MC-452 and I enjoy it's sound, but I don't think I would base a car purchasing decision, especially in $100k range based on what kind of sound system is installed.  I remember back in my car audio days - @crustycoot - when Mcintosh produced seriously expensive and very clean sounding car audio amps as well as a gorgeous cd player head unit with trademark glass faceplate.  I was in IASCA finals in Greenville, SC in mid 90s and remember a guy with pink/purple Saturn that had a full surround sound system in it powered entirely by Mcintosh amps.  Crustycoot is right, they did not have the watts to compete with Precision Power, Orion and other old school amps.  Back then your car had to "burp" 140db on the dash, which is a lot.  On another hand on a recent trip to Philadelphia Alamo ran out of cars and we were given a 2021 BMW 740i with Harman Kardon upgraded factory sound system.  It sounded excellent, but to me other features about the car would be more attractive as far as making a purchasing decision, some of them were crazy, even by 7 series standards - heated armrests, adjustable ride height, GPS that knows where potholes are and warns you about them - very useful in Philly!  Sorry if you are from Philadelphia, but your entire city needs repaving asap. This would not be a first collaboration with car manufacturer for Mcintosh, they did one back in early 2000s with Subaru, if memory serves you could only get that stereo in LL Bean edition Outback and that car was over $30k back then.  Just my $0.03 cents ($0.02 cents inflation adjusted).

I'll take two. 

I drive a 2019 Subaru Outback and my wife's car was a 2020 Lexus LS350.  Both systems sound nice but I don't think I even paid attention to the brand of the sound system - I just wanted CD playing ability.

But my fondest memory is my no-name 8-Track player in my 1969 Chevy Malibu.