Hey guys, this is the first time owning a Golf, I have a Mk7 golf 1.6 TDI Blue motion and I've noticed this green button just behind the steering wheel near the control for the lights. When you press it, it blinks 3 times and goes off again, but no idea what on earth it does or why its there?! It seems to me to possibly be aftermarket maybe but anyone got any idea what on earth it is?