Tutorial extracted from seatibizanet, done by Sevi in that forum.
It seems that I dont have permissions enough in this forum to post images or link anything, the original post has sceenshots for all the steps.
HOW TO DISABLE EGR BY SOFTWARE
Tools required:
Laptop
OBDII cable
VAG-COM Software
1. Plug in the OBBDII cable to the car and start the engine, the car temperature should be service temp (engine already warmed up)
2. Start Vag-Com and access the control module clicking "Select"
3. Access engine conctrol module pressing "Engine 01"
4. Press "login 11" to access the screen where the activation code has to be introduced
5. Input activation code "12233" in the only input box avaliable, press "Do it!"
6. In the previous screen click on "Adaptation - 10" to access the channels with the engine's values
7. Acess channel 03 and in the "Stored Value" box the code "32768" should appear, meaning the EGR valve is active. Check the field labeled as "Mass air/rev" it should be aound 250Mg/g
8. In the "New Value" field input "33768" and press TEST, check the "Mass air/rev" value after, it should be around 370 now, this value might be +-25 around 370
9. Press SAVE to save the changes, a confirmation dialog will come up, press YES to validate.
We are done at this point, EGR disabled. Press "Done,go back" and close the program if you dont wish to make any additional changes. Dont panic as the ECU will change the "33768" value to "33638", this is absolutely normal.
To reactivate the EGR valve, follow the same procedure and set the value to "32768" instead.