It has a similar setup and works in the same way. As you have found by using the search, the module is in the door instead of the boot area. The only other difference is the remote modual is in the key for E1 and on a seperate remote for the later models.
From that, the obvious solution, if everything else is working on yours..the module in your key is fucked, even though the led
lights up doesnt mean the module is sending the signal.