The problem is your car is too new for many of us in the aftermarket to have that information. Hopefully a dealer technician will see your post and reply.
I looked at my information for the 2007 RDX and you need specific instructions and illustrations that must be followed to disassemble the mirror. I often print instructions for people that come in and ask for instructions, (many have come back and become customers). Ask nicely at an independent repair shop that specialize in Asian car repair hopefully they will be obliging enough to take a moment to print instructions for you.