anything to look out for

[kite]

I will be changing the drivers door lock on an A3 3door.
this is due to the microswitch failing causing the C/L and DIS and inside lights not working correctly.
Anyone changed on of these ?
Anything to be aware of ?
Any links to good "how to" ?

Thanks

[kite]

Ahhh..looks like I need a triple square bit, anyone know the size....