Well, I have an extremely frustrating update.
I took the C40 into the service center to have the Volvo trailer hitch installed, and to have them look at the broken trim. They said they'd never seen this trim problem before, but didn't seem shocked by it -- basically indicated that similar things have been issues with other models of Volvo, and it wasn't a big deal. The part was backordered, so they said they'd temporarily attach the broken trim to the car.
A couple hours after dropping the car off they said they'd need to keep it an extra day because they forgot to order a part necessary for the hitch installation. Weird, but OK. Then when I picked the car up a couple days later I found glue smeared all over the side of the car. (See partial photo below.) When I brought this to their attention they spent a few minutes trying to wipe it off, then said that when I bring the car back for the new trim, they'll buff it out. In the meantime, it's quite ugly and has certainly damaged the ceramic coating and presumably the paint job as well. I have no idea why they thought it was a good idea to glue the trim on, rather than using something less permanent like double-sided tape. Even less idea why in the process of doing so they smeared glue all over the side of the car. And I don't care to guess whether they somehow didn't notice they had done so, or simply hoped that
I wouldn't notice.
Also, ever since getting the car back, the tailgate no longer opens via foot movement, so it seems they either blocked or disabled the sensor.
Not a great first experience with the Volvo service center. The C40 has a lot of plastic on the exterior. Too much, it seems. My advice for anyone who needs a repair for this plastic is to insist as forcefully as possible that no glue be used.
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