Passenger side wing mirror

This may seem trivial but it is annoying! The passenegr side wing mirror on our 2006 L322 3.0 diesel RR doesn't stay folded back. When I press the wing mirror close button both sides retract but the passenger side then goes back to being fully open.Weirdly this happened after clearing codes after fittingnew upper and lower suspension arms. Previously the passenger side wing mirror had stopped tilting while in reversebut then started working again.We recently replaced the window regulator without any issues and I am sure I have seen a 'fix' mentioned somewhere regarding a reset that involved using the memory function on the driver's seat, but I cannot find it anywhere now. Advice would be greatly appreciated as we are setting off to go camping in Normandy France at the end of next week, just in time for the crap weather predicted!

Something about this on the merkin site. Try double tapping the fold button a couple of times to resync or a dodgy micro switch.
Also I think the auto dip in reverse only works with the mirror switch switched to the drivers side.