There is a soft material between the vinyl and the metal to cushion it to the touch. That material is similar or the same as what you'll find backing many headliners on cars which have the headliner glued to the roof.

A substitute to that material can be bought at Walmart. Just find something thin and soft which won't dissolve when glued.

It's not rocket science. I did it, anyone can do it. I think I used a closed cell styrofoam which came in a roll like the cloth material.

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84 300SD
85 380SE
83 528e
95 318ic