No, I did not turn the ignition while putting in the new seatbelt. I actually had the batter disconnected the whole time. Upon putting the seatbelt back in and connecting the battery and starting the car, the SRS light still illuminated for about 90 seconds, as usual.

I took it to the dealer, they ran the test, cleared the code, checked it, and it didn't come back. Still hasn't come back. Everything's fine now. But $90 later, actually $190 for having them fix change all the lights in the cluster. $4 per light? And there are 24 back there? Wow, what a rip. OH well, they still gave me a deal because of the labor taking the cluster out.

But they also told me that I would need a new cluster @ $900 since my gauges would stick sometime... I passed on that one!

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)