If he knows his Jb4 account Info ask him to give it to you. Connect to the Jb4 with the app and log in with his account. Then press unlink current kit. About contacting the support team I’m not sure, maybe try sending the screenshot in a .pdf format? If you would like you can PM me and I’ll try...
There’s a couple of radar detectors you could get that are virtually undetectable by police. You just gotta place it somewhere hidden and or an easily accessible place so you could grab it real quick.
I can confirm an angle grinder spanner works for tightening it. If you’re near a Harbor Freight this is the exact one I got.
https://www.harborfreight.com/adjustable-pin-wrench-36554.html
I assume so. If you have time you could go set the sport mode exhaust to normal and test if it has the burbles, since we established it’s not the flap causing them.
Clear the code and see if it comes back. I had the same code appear but it went away after I cleared it. If you have a rough idle when your car is warmed up (car randomly shaking), or you hear a weird tapping noise coming from your car when you first get inside, then you might have a valvetronic...