[steamship]

Going by the user manual, the valet mode button should be pretty obvious (although it isn't red, as shown). The manual also mentions that to operate the boot from the remote, the button should be pressed 'briefly', as opposed to the 5+ seconds you mention. One post I did see suggested 'resetting' the key, by removing and replacing the battery in it. Since neither of yours work, this might be easy option to start with, although it doesn't seem to make sense if the remote locks/unlocks the car.