Hey Tom,
First, I gotta thank you for posting such a detailed and extensive run down on the C6 Low Beam issue. I almost bought new bulbs, and I almost bought a new fuse box, but after I came across your post, I realized what the problem is. It's the classic story--the lights work early in the morning, or after the car has been sitting for a while, and then after driving for about 20-30 minutes, as soon as the car get's warmed up, they go out. I'm driving a 2007 C6 cpe with about 85,000 miles on it.
I spent all last night taking apart the box, fuses, relays, etc. following your instructions, but there's one thing I'm stuck on. THOSE 4 BOLTS! I'm not sure about what you mean at this part. I can't get those things off for nothing. Is there any way you could send me some pictures on how to do this? I know this is an old post, but any help and/or advice would be greatly appreciated. Thanks in advance man, and btw, you're right about those nitto NTO5's.
Cheers,
Jon