I've got the same issue and it's a problem w/ the coolant temp sensor. It's telling the engine that it is cold so it makes it go rich by increasing the "cycle on" time of the injectors. I've also got a MIL on and off w/ faults for the temp sensor. I'm replacing it tomorrow. Will let you know if...
Tell them you need the power supply relay and give them the VIN and production date of the vehicle. They can lok it up in ETKA (parts program that VW/Audi uses). If they say they can't, they are lying. You should go to another dealer who will help you.
I am a dealer tech in the US for a VW/Audi...
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