Bongo Fury

Fitting this product requires the removal of the parking mirror. It looks as if the screws are very difficult to access. Does anyone have any experience of this?

Do you mean the screws are obscured by the spoiler-if so the spoiler is easy to move out of the way.
The spoiler is held on by screws accessed from inside the tail gate and the wiring connector comes visible as the spoiler is lifted off.
hope this helps