You're welcome :)
Hmm, well if it's the EGR/ EGR cooler than this could be expensive to fix. When I worked at volkswagen in the service department it would cost over £1k to fix sorry to say.
Here's the link to the Audi website to help with regard to the emissions recall:
https://www.audi.co.uk/owners-area/emissions/check-your-car.html
Cheers
Steve