[antoncohen]

> can anyone explain why in the US if I click unlock on the remote, it just unlocks the front door? This keeps happening on rental cars. You have to click twice on unlock to get all the doors to open.

This is likely configurable. Instructions should be in the owner's manual. It is configurable for both my and my wife's vehicles, one via the touchscreen and the other by pressing and holding unlock for 5 seconds.