While trying to change a fuse, I've dropped it in the passenger footwell (CJB). I've looked for it with a borescope but it's nowhere to be found. Does anyone have any idea how dangerous is to leave it there? Should I attempt to take the glove boxes off and remove the left part of dashboard off or should I not bother?
Thanks!

Forget about it. Totally inaccessible unless you start taking the car apart. You would have to be extremely unlucky for it to have landed somewhere problematic. I dropped a few ( ) in my first Sport and never had any issues. Just underscores the importance of keeping spares. Current: Volvo XC90 T8 Inscription Pro PHEV with some optionals on top
Gone: MY16 RRS2 3.0 SDV6 Autobiography Dynamic, Carpathian Grey & Santorini Black Sliding Pano/Ebony & Ivory 2 Tone
Gone: MY13 RRS 3.0 SDV6 HSE Black Edition, Orkney Grey/Ivory
Gone: MY09 RRS 2.7 TDV6 HSE, Santorini Black/Almond