Mar 1, 2017 (3 years ago)
Had the same issue, all the motors (three in the boot area) must be set to bottom dead centre, this means removing each one, and the cover, then setting the arm to as far down as it can go, you can also check each motor by applying 12V dc and make sure it works.
Regarding the boot open button, remove the trim and button from the back, remove the button connector, with the car fully opened check for 9V DC across the connector (if not its a wiring problem or the ECU needing reset) also check the button on Ohms, if connection is poor use switch cleaner (it will work its way in)
One other point check the hydo fluid (lives in a pouch to the RHS rear boot) you need to lift the rear boot carpet and then the white box.
There is also a good video on youtube (one hr long) from the manufacturer on how to access and line all the motors , roof up without getting into a mess, also check all wiring as well (Hall sensor cable that runs up LHS arm)
ECU reset , disconnect battery leave for 1 hr then reconnect, this will clear any issues in the ECU.
Took me about four days to sort mine out , a garage had removed the rear button and broke two wires ! the time was mainly getting motors out and setting them to BDC