Remember, if you want to leave the FEH on with the key, and ICE-OFF, put it in neutral and apply the parking brake. The Ice will not restart during this time, but the battery continues to drain. I'd put something over the keys to block sight to prevent break-in and car theft myself. You may also have to disable the auto unlock with the key in, not sure of that with the key on. I would also give this a test run with a spare key in hand first, then try the keypad to open.

Best $53.95 I've spent on my FEH.

GaryG