Hello, I hope the following assists you. You need to remove the mirror glass to be able to release the indicator without damage. Below are the instructions to assists you. https://www.dropbox.com/s/cho7ak8zsv88jdw/indicator1.pdf?dl=0
https://www.dropbox.com/s/q5n75wc45idkspq/indicator.pdf?dl=0 Let me know if I can give further information regarding this. Best wishes, Sean.
Does the mirror just flip out - ie use a screw driver to pop out ?