My A8l has had a lot of weird electical issues. Initially trouble cranking every couple of days or so, then MMI starts going in and out every day or so. Next satelite radio no longer recognized then its fine for next few days, now car just shuts down while driving down the road and no longer will start even though its cranks fine with new battery.
Constipation has perhaps set in. I saw that reported by another I recognize from the Q5 board.
Cleared my zillions of duplicate initially failed test responses here, but then tried to reply to PaulW's A/ C one. No joy. I'll see if my cut and paste of what I already put on QW eventually shows up here on Paul's question. For now, still somewhere in the cloud on the AW side.