I had some of my interior paneling slipping away fromt he seat belt holders. I used some epoxy glue, and that thing has stayed where I glued it since.
I only had to stretch the fabric about a centimeter to cover what it was not covering anymore.
Has worked great for the last 4 months.
The reason I used the epoxy is because it dries very hard, and can be adjusted for at least a few minutes until it really starts to stick good.
Now I'm not sure what others would say about my use of it, but I figured no harm done as it works for me.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.