If your key won't open the trunk you are using the Valet key. I found that out when I went to have new keys made for Kitty. (I couldn't open my trunk either) Go to a good locksmith and have him make you a key for the trunk, it will work on all the locks.Sestais said:your M edition has keyless? DAMage.. I can't even open my trunk WITH a key, somehow it's messed up and I have to use the latch by the driver's seat.