Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Audi A4 SE Ultra Tecknik › Audi A4 SE Ultra Tecknik September 30, 2019 at 12:33 am #894596 BillyParticipant If you don’t trust your mechanic, get a second opinion. If you want to fix it yourself, start by buying or borrowing an OBD / VAG-COM scanner.