Hi all bit of a weird one this, my tailgate works fine it bings it rises smoothly and it stops at the top, the parcel shelf retracts etc no issues, however what it wont do is lower from either the fob or the door switch only from the red button on the tailgate, if I try the remote or the front door switch I can hear and see the lock make a small movement and a click, does this indicate an error or is it just in need of adjustment or lube? Is it a common fault with these and if so whats the solution? The alarm rearms fine when you close the tailgate as well