Questions about NTG2.5

[schou]

Hello,

I retrofitted the NTG2.5 on my 2005 W211, every thing works fine but still have some questions, please help:

1) When I switch the ignition to OFF, the clock of NTG2.5 will reset to 08:00 everytime, it will become to correct time until I drive the car out of garage and get GPS signal, is that normal?

2) How to change the NTG2.5 parameter in the DAS menu? I can only read the coding but can not modify it, should I need to SCN?

Thanks.~