I had the same problem in the M5 and in the GS. The M5 seats are very similar to the F10, main difference being that the side bolsters are adjustable and deeper, but the position adjusting range is similar.
Originally Posted by solstice
I'm 6'1 and the M3s seats are way better for my body type. Even better than the E60s. 8h non-stop brings zero fatigue in the M3.
Stealth, you spent time in the M5 did you have the same problem? What about in your GS?
It turns out Needsdecaf was right. Sitting with the seat cushion angled up somehow causes pain in the lower back. I switched to a more level seat cushion with a higher height, and the problem has gone away completely. Now I am very comfy and still have good visibility.
However there is something about the seat design in the BMW which is not optimal. I noticed in the BMW that when you raise the height of the seat, the seat also moves forward. i.e. full back is further forward when seated high than when seated low. This forces a trade-off between being too close to the wheel or too low. In the Lexus I sat in today, raising the height didn't move the seat forward. It was a much better design for creating a comfortable seating position.
It doesn't surprise me that your M3 has better seats - my old E46 M3 also seemed to have better positions available to me.
2014 Porsche 911 Turbo S
2015 Mercedes C300 4MATIC
Memberships: BMW CCA, Peachstate PCA, NMA, AAA, RAC
2015 Jaguar F-Type R
2014 BMW M5 Individual Dinan Stage 1
2013 BMW M5 Individual
2012 BMW 550i Dinan Stage 2
2004 BMW M3
2001 BMW 330Ci
1997 BMW 328Ci
1994 BMW 325Ci
Last edited by Stealth.Pilot; 02-01-2012 at 08:29 PM.