Thanks. Interesting you would refer to the B-pillar trim. The dealership removed ALL of the rear trim, including that on the B-pillar, to get to the package shelf when I had it replaced. When I picked up the car, my service writer pointed out that when removing the little plastic rivets holding the B-pillar in place, they'd whitened slightly after being flexed. He ordered me a new set and I'm supposed to go back in when they arrive to have them replaced.
Since they have to pop out the existing, damaged plastic rivets, I'll just ask 'em to check the antenna wire at the same time. Keeps me from having to pull on the C-pillar trim, right?