Thanks Gilbertd.
OK, I must have failed to notice this happening when battery previously removed. I've been slow to notice this, but now I have - its really irritating. Currently the switches on the drivers seat are intermittent. I was hoping to swap these with the gems one (externally look the same).

I cant adjust seat with buttons, but nanocom can.

Will try this later, thanks again

Mirror function restored, thanks.
Good job I had the nano handy, whilst the memory buttons work, the buttons to move the seat do not. Both stored positions were for people who would have needed a ladder to get in. Accidentally touching one button nearly cured my knee problems permanently.