^^^
I'm 6'5". The S5 has a giant moonroof and I think that's why it's lacking in headroom for me. I like getting cars without a moonroof and with manual seat adjustments just for the extra 2" or so of headroom. My current car is an A6 with a moonroof and I can just barely fit into it comfortably without having to lean the seat back a lot.
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"Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars." - Martin Luther King, Jr.