There's a thread somewhere here where I'm moaning about the Tesla seats, so I don't need to go into detail again. TLDR - NG Seats gave me back pain. I'm broad shouldered just under 6ft, got a few extra pounds. So I bought another car to see if the back pain was me or the Tesla seat. Three days after driving in the new car - no more back pain. For me I have isolated it down to the way the NG seats are shaped. The side bolstering (for my MS) makes the seat concave all the way up to the headrest, which lurches forward dramatically. This pinches my shoulders and pushes my neck forward. Those of you with narrower shoulders might never see this problem because the seat wraps around you. Compare this to the seats in my BMW... The bolstering stops before my ribs end and my shoulders can stay flat against the seat. You get the same good ergonomics in the Benz S550... ... the seat doesn't collapse under your upper back. Is there any way to make the MS seats firmer, maybe less concave? Do the old seats do this? Can an upholsterer do anything? Tesla have no idea and apparently no fix.