The trim popped because the glue gave up, and unless you strip off the old adhesive and redo, it will never stick injecting glue. Thus the scews. Better than busted trim.
If it runs well and drives right, it's all price and your willingness to go there.

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95 E300D working out the kinks
77 300D, 227k, station car
83 300CD 370k, gone away
89 190E 2.6- 335k, no more
79 VW FI Bus- 145k miles, summer driver
59 VW Beetle ragtop- 175k miles
12 VW Jetta- 160k miles