How do I reattach the leather headliner of my z4 winshield trim kit.

What is your question?

My 2008 BMW z4 convertible has leather covered interior winshield toptrim piece. The adhesive thad bonds the leather is drying out and wrinkles are forming. Could I heat the leather, possibly soften the adhesive and press the leather back in place to re=bond same. Is there any other alternate solution rather than buy a very expensive $600 tirm kit. is this a common problem for this typ of vehicle.