Avant 4 on the fritz

[ATB88]

My avant 4 unit's been acting up like crazy lately. Wondering if anyone has experienced similar issues and/or has troubleshooting tips?

As I drive, it constantly switches between different apps at will -- between radio, backup camera, video player, music player. It often *seems* correlated with going in/out of gear/neutral/reverse (6MT car), but that's not always the case. It seems to happen alot more when I'm street driving than when cruising on the highway. It seems like I can always guarantee it to happen when going into reverse though. There shouldn't be any electronic signal for going in/out of gears other than reverse right? Except for the clutch switch I guess? But how is that wired to anything that talks to the Avant? Also, steering wheel controls only work about 50% of the time -- if they're not working at startup, they won't until maybe the next time I turn the car on. If they work on startup, though, they'll work until I turn the car off.

Kinda confusing since this started happening totally out of the blue after 18+ months of trouble free operation.

Thanks for any suggestions

[lemoose]

Hows your battery and alternator?

[ATB88]

Hows your battery and alternator?

Alternator was replaced 5k miles ago, battery passes health tests

[Shonky]

My first thought was electrical interference although why that might change from a working system, I'm not sure. Maybe a bad ground? That'd probably also explain the steering wheel controls (they come from the I bus I presume on these)

Also not something on the screen? Capacitive screens an be affected by things on the screen but they'd usually be noticeable like a drop of water or something.

[yhp2009]

Would be helpful to have another head unit that is known to work. Also to try your malfunctioning unit in another car. That is if you can find a donor