Hi folks, we just got ourselves our first caravan, a 2004 Elddis avante with a winterhoff stabiliser. I am having trouble engaging and releasing the arm on the stabiliser/hitch. There is clearly a knack to this which I haven't figured out yet. The lever seems to have two positions, one to release the stabiliser and one to release or attach to tow bar. Attaching and releasing the tow bar is tricky. If anyone can explain exactly how I should do this I would be very grateful.