Some wealthy people like driving. An S-class is one reasonable thing you might purchase if you are wealthy but enjoy driving and would prefer to do more of it than (likely) is necessary or ordinarily appropriate for your station in life. It's a nice car, it's too expensive if you need to justify the price, but if you don't care about the price then why not?

So if you like driving, then you might choose to live somewhere that's a "longer commute" even though you needn't - as this is part of your day which you enjoy. Now, that's probably not going to be bumper-to-bumper freeway traffic, but it absolutely might include country roads at limited speed - I said enjoys driving not racing, if you like track racing and have $$$ you can indulge that without owning a road car at all.