where can i get a the actual Firmware and the MCU KLD6 v2.81 which was on the radio i bought Order# 100003799
I tried to update the MCU with the KDL6 v2.83 but since then wheel steering control and Touchbuttons on the device arent working anymore and the S/N on the device is gone too. The field is empty now

What can i do?
I hope someone can help me and hopefully i can fix it then
Thanks a lot