I used that button once, a couple of years ago, when my (new) UK car broke down while on holiday in Ireland. Since I wasn't in the UK it connected to some international help service, and the first thing I heard was the typical "press 1 for xxx, press 2 for yyy, etc". Since there was absolutely no keypad where I could press anything it was completely useless. I tried waiting, speaking numbers out loud, but nothing worked. In the end I googled the service number & called it on my phone, where I couild press number buttons. I reported it to Skoda, but never heard anything, looks like it's as badly designed & tested as the rest of MIB3.