Tekkno84
1) When i start car ignition screen goes black for a sec, after reboot this doesnt happen for once then it occurs until i reboot again ( new canbus or wires can solve this?)
Check out settings area, if you have OS 3.5 but should be similar to 3.6 Beta
Settings - Vehicle - Startup
Switch to Sleep instead of shutdown, check if this solves your question
2) is possible to switch between apps like on phone?
Yes, if I’m thinking of what you are, if you press and hold the home button on the Navbar, this will display all apps opened, you can close or tap to bring apps opened to the front
3) Bass is too powerfull even when i turned off dsp and lower bass on equalizer
Not able to help here, apart from saying to keep playing around in all the areas in the sound master app, what helped me for a Toyota was to take a picture of the equaliser and send it to ChatGPT, believe it or not if gave me values which sound pretty decent to me.
There may be user saved setups you can apply to try (you need to be connected to the internet to view them)
4) on steering wheel next and previous track is switched on left is next track on right previous it should be opposite.
This can be changed in settings
Go to settings - vehicle - factory (input passcode 108)
There should be an option to swap the track and volume buttons, also door opening indicator they are the wrong way around
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Hope this helps