kiwi2

O and to secure the memory foam at the top I took the headrest off put the memory foam there then punched thru the foam with the headrest to hold it in place at the top. For the bottom I tucked the foam between the upright of the seat and the seat bottom.

Hi Adam I resolved this problem well and 2 years later and its very comfortable. I finally bought a high quality sheepskin seat cover then I put one piece of memory foam 12 inches wide and 3 foot long which I placed vertically on the seat upright then another piece of memory foam horizontally across the bottom of the seat upright and put the sheepskin cover over the top. The memory foam was between the seat and the sheepskin cover. I then didn't need to stuff anything in the seat itself as in the end I didn't want to interfere with the airbag and I couldn't get it perfect and it works wonderfully. It was also easy to adjust to the best position which I haven't touched in 2 years. I haven't had an issue since and being sheepskin it's also warm and you don't slide around either. The memory foam was about an inch thick.

As above worked for me if you don't want to undo the back of the seat you can just order the yoga back product I can't get it as I'm in New Zealand let me know how you get on

Had exactly the same problem not uncommon. I have solved it by unzipping the seat back and stuffing memory foam and felty stuff in two places 1. Around the hips and 2. just below the shoulder baldes. Diagrams and the reasons why your lumber is hurting is explained by googling "yoga back driving" it has an explanation of where the bolstering should be. You dont have to buy the product you can achieve the same results by reshaping the seat by stuffing things in. Once you have opened the back up and undone everything leave it like that for a week and you can keep adjusting till it feels right. It has completely alleviated the pain and I was in agony and was going to sell it for that reason. let me know how you get on.