Hey,

The SL55AMG has lumbar support and evan has ajustable waist support which means if your on the turny roads, it holds you in position more comfortably, rather than sliding around. It also has something called pulse(on the passenger side at least) which will actually give you a massage.

 

Strongly suggest you test dive the S55, its like riding in the hand of God, yes its worth it. SL55 is small if comfort is what you want get the most out of your $100K, your body will thank you! (The seats adjust more than any other seat on the planet, with heat warmers, seat coolers, lumbar adjustments and yes even a massager, you giggle all day when you driving. Like you I drive endless miles, dont miss on this one!!