R170 slk door card falling apart.. best way to rebond?

[The Boss]

guys/gurls

best advise please

i have slk door cards on my R170

some of the door trim is starting to come apart.

please advise of best adhesive to bond back together.. one card is loose from the rear, the other is loose minimal in the middle....

any advice appreciated

 

[Image2000uk]

Hot glue gun works really well have stuck many a door card back together with one of them