Quote:
Originally Posted by Trip3's
I just bought a 2009 M3 today and while I love everything about it, the lumbar bolsters are like a vise. I tried using the round adjustment knob (the one with the arrows going 4 different ways). I tightened up the seats using the button and then backed out and it still was tight. Hopefully someone knows what I'm talking about.
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I think that the round knob of which you speak is the lumbar adjustment.