8E/B6: coming home leaving home -> blinker in ausenspiegel

I wonder if it is possible to replace the black bottom part of my mirror with a transparent part, so that a indicator light inside the mirror can be installed.

In fact the indicator light function is not my primary target, but as my car is equipped with the coming home leaving home function, I would like to have some light at the side of the car, so that you can see the dog shit (and avoid stepping into it) when you want to enter your car ;-)