I have a '95 E 320 that had the identical problem. I repaired them using the new brush on Super Glue. After applying the glue to the material I used small, strong clamps with a strip of wood the same length of the pockets, I left the clamps on overnight and the material stayed in place perfectly. This was months ago and the pockets still look perfect. I did take the vehicle to an upholstery shop where he attempted to repair them with contact cement...this
did not help at all.