My wife got a 2013 Passat about 18 months ago and on the first long run I got neck pain from the headrest forcing my head too far forwards. Although our previous 2006 Passat had been fine I assumed it was just a modern VW issue.
About a year ago I bought a 2011 5-Series after a very short test drive because it was a BMW, and silver, and seemed nice. I've had a lot of BMWs over the years and always found them very comfy. But the first run of over an hour or so left me hurty. And then a trip up to Lancaster left both me & the wife with neck/back pain. Daily commute was bearable.
I've just started commuting again and it's not OK now. So I Googled a bit and eventually found this. Apparently the headrest thing is the law now. Well, American law, which I guess global manufacturers have to follow if they want global sales.
If you have the time to wade through it (spoiler - you probably don't, it's bloody long), there's some astonishing decisions in there. The main one for me is that the whole thing is based on matching a 50th percentile male and despite objections from major manufacturers they stuck with it. I'm just above 99th percentile for height and this standard would appear to mean any car from the mid 2000s onwards is likely to be cripplingly uncomfortable for me

https://one.nhtsa.gov/cars/rules/ruling ... .html#doc6