Silvershadow

I think my front radar is now useless been through some heavy rain just lately and now shows front assist/ACC is unavailable & suspect water ingress may be the problem, before I go to the dealers & takeout a loan for the costs I would like to see if anyone out there can answer a few questions. (Not had it plugged in to diagnostics yet but seems the radar unit is a fairly common issue) Is the unit prone to water ingress over time. Does anyone have a link or easy guide to the radars accessibility. (Don't want to remove the bumper) If I managed to get the unit out can this be opened up to dry out maybe. If a second hand one was sourced (there are many around) what would need to happen, ie can you just fit it & hope for the best or would there be some re-programming & calibration need to be done. And lastly anyone done this or have contact for anyone who could look into this for me Derbyshire/Nottinghamshire area. Thanks for looking & any replies

My car currently has no SD memory card installed for maps; I would like to update this for my 2017 Superb as they are set to its 2017 build date. I have inputted the VIN on the Skoda Portal and believe it's a Columbus system. If i purchase a generic 32GB SD card what physical size card do i need?