Took it to the dealer today. Did the recall stuff but “couldn’t reproduce” the hooting noise. Said they verified the function of the turbos and everything is fine. Hooting the same on the drive home. Guess I will have to wait until it turns into something bigger or get used to it. I did change the oil on Tuesday and will confirm the transmission fluid level later just to be sure it isn’t something silly like that. Maybe it’s normal. I do have another three years of drivetrain warranty and it’s been documented now.