Hi to all....problem solved !!!....I use some rubber seal to eliminate the gap between the plastic locker and the undercover....just to improve a lit bit the internal acoustic comfort I use some wrapper like this around the metal seatbelts since when they are not used and touch the plastic they makes some other clicks...then I put some 3M Velcro in the rear van because the top cover bumps. I use the velcro even to lock the plastic section that contains the emergency tools.
