Hi everyone,
Well, I used the central locking switch this afternoon on my series 2, and it went 'sproing'!
Now I have the rocker switch, a spring, H shaped plastic piece and a small brass roller.
Anyone know how it goes together please??

 

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have you solved the problem? seems like your missing a brass plate, all it needs to do is take power from the center of the switch to either end for lock unlock. i decided to upgrade the system & fit remote central locking system $25, switch stays in location even if it's not working, control box will hide in central console, sure makes it easier, private message me if you want info about remote system.........Tom (Sydney).

 

Hi Tom, Thank you for your advice !
Looks like the brass plate is history unfortunately.
I'll try to buy a replacement switch and failing that look at the remote option.