We finally discovered the problem. It was the radio receiver, the main AV console. Part number 259159GE1A. It controls all those functions that were failing for me.
It runs a cool $6,300 from the dealer, and I was out of warranty.
So, I found one for under $300 bucks on eBay with a warranty, and I'm going to swap it out myself.
It runs a cool $6,300 from the dealer, and I was out of warranty.
So, I found one for under $300 bucks on eBay with a warranty, and I'm going to swap it out myself.