Join Date: 3rd June 2006
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This can be done but no simple answers. The theory of connecting to the central locking circuit direclty could work but has a few issues. It means that you would always have to drive the car with the doors unlocked (kiss goodbye to your auto-locking feature), this could be got around by having a 'sense' wire, which would be connected to a circuit that knows that the engine is running (more complexity). ie engine running -> doors locked = no folding. However, what about when you want to fold the mirrors when the engine is running. ie driving in/out of a garage perhaps.
I know my Bro' in Law's Mercedes has the auto-fold mirror function - I will take a look at how it works. There must be an over-ride which will not open the mirrors on un-lock, as mentioned somewhere else, that could be messy in a tight spot.