A fellow named Carlos is the Eonon rep here
E46Fanatics - View Profile: EononCarDVD
and has helped coordinate group buys and troubleshooting and solutions for the E46 units Eonon makes.
Maybe he can help you.......
I'm holding off on an Eonon unit for my factory nav E53 until I feel better about all these issues.
Sorry, but at nearly 2X the price the Dynavin N6, while receiving awesome reviews, is a non-starter for my budget.
Mike