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Is this correct ?

Hi ! I have Mk3 -16 Octavia 2.0 TDI 4X4 VRS, with bolero system, i have started to have issues with apple carplay, it has worked almost perfectly to this moment. There has been times that i have done soft reset for the radio by pressing the power button for 10 seconds and that has fixed the problem. After winter and -30C arrived problems started, i dont know if this is related to that. When i cold start the vehicle and plug my phone in to it it can work fine for 5-20minutes, then display freezes and carplay disconnects, after that it wont connect again, bluetooth and charging works fine. I have tried different cables and phones, same problems with everything, i am starting to think that the problem is the usb socket. Does anyone have guide to how to change this ? And am i correct that i have to take the screen off and also air condition panel ? If i take the screen off does it need some kind off code that when i plug it again ? Thx for your help ! Br Petri