battery change

Hi everyone Here is my problem: I had to replace the battery (EFB) because previous just dead, but after that many of systems like ESC, ACC, Auto-Stop, tyre-pressure monitoring, front assist, parking assist and etc...all of them have "ERROR: ..... is not available". Ignition is working, I can...

So my fob stopped working after changing the battery recently. The battery was only low but when I put the new battery in and it didn't work at all. I decided to put the old battery back in and to my surprise it still didn't work! Thinking there was a particular technique to changing it, I gave...