Need your advice about how should i solve this ...

HI

Well-known problem on the E9 upholstery.
You have 2 solutions:

1/Extra-strong glue or 2-ingredients adhesive (Plastic-metal).

2/Drill tiny holes on the lower edge and screw with black screws, you can find on the center console for example.

But best"original" choice is the first one.
rgds.
 
Simoniko
If it were my piece that needed repair. I would use a good contact glue with clamps and wood with shims.
The surface between the 2 parts is probably covered with a fuzzy remains from the delamination. Clean this off as best you can before glueing.
Good compression, and good glue are the keys.
steve
 
I used Gorilla glue and lots of clamps. Seemed to work pretty good. This stuff doesn't care much about loose debris. However, you need to be carefully with this type of glue because it expands wildly - I was able to trim the "blow out" with a flat razor before it completely set.
 
A warning could be on place!
To strong clamps could leave permanent marks because of dried out foam inside trim parts.
Try to divide the pressure over a large area.
 
ALL

Marc - thank my friend , i will stick to the glue solution!
Thanks Steve and Stefan for the important remarks , jhjacobs also !
My respect for you guys ! I am preparing a web album dedicated to my restoration and i will share my complete work !
 
Jhjacobs and others are right regarding lots and lots of clamps to create EVEN pressure.

I used a very strong construction adhesive called "Liquid Nails Professional". I also made sure the inside of the metal backing (where it meats the back of the foam panel) was very clean of loose (old) adhesive and even scored the surface with a dremel tool to ensure good bonding.

Leave it to cure for a few days because it will be dificult for air to penetrate to the center (it will take time to fully harden & cure in the center).

Again, lots and lots of clamps with cloth-covered wood to dispurse the pressure and protect the black surface.
 
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