Hi everyone,
After sending this question to a technical support on 28.07. and no receiving answer till this moment,
I'm posting it here again, hoping that somebody faced the same issue and found some solution.
Very annoying sound dropping for 3-4 seconds, every time the navigation voice or sound is ON.
After hours of investigating I've found out that the problem is inside the touchscreen adapter, which mutes completely the connected speaker, when it receives signal from the navigation /There is also "click" inside the box like coming from a relay/ and activates it back after a couple of seconds.
I found that inside the original menu there is an option "NAVIGATION MUTE - /ON - OFF/" but it's completely useless.
If you choose "OFF", the sound from the navigation dessappears completely.
The same situation if I try to use AUX OUT cable, plus when you raise the volume, it goes UP to rest of three speakers and DOWN to the navigation speaker (which in my case is the Front Left Speaker of the car)...
My question is: Is there a way to disable the TOTAL "MUTE" action and use "voice over" instead, because this way
it's impossible to use the navigation voice guidance without going mad after a half an hour?