Hi Everyone! I have an issue what Audi Service seems to be unable to fix. I have a very strange noise coming from my car at cold start, for a few disturbing seconds, then it goes away. This happens almost every time I start the car, even after 15 minute rest. I have attached a google drive video link. This is my video: https://drive.google.com/open?id=1pxPxML7Sg0XcjdAW42BtPYMQlQun9ru4 It will go for the 3rd time on a service for this problem, still on warranty. Bought it with 29.000km 4 months ago, now it has 35.000km. I have made a couple of searches, the issues might be related to: turbo wastegate turbo wastegate rod turbo actuator / linkage dirty egr valve Related topics I guess: https://www.audi-sport.net/xf/threads/1-4-tfsi-the-rattle.191924/ https://www.audi-sport.net/xf/threads/new-a3-s-line-turbo-charger-linkage-fault-at-startup.185941/ I found a similar issue, almost the same at 8, 12, 14 seconds. (A3c sound clip), but mine does it more constantly. I am not a car guy, so please be easy on me if I write anything nonsense. I mainly use the car for 200 km trips on weekends. Maybe the previous owner used it in only in city. Could you please help me figure out what the problem is? Thank you in advance! I will post the solution if there is any.