It should start with a '0'. Something like 02057
51.
You need to change the 2nd to last digit, adding 4.
0 2- Brand/Model - (2) Audi A3
0 - Diagnostics/Parking Aid
5 - Sound Characteristics - (5) Audi A3
7 - Phone Prep (7) - assuming you have phone! If no phone this it's 1 I think.
5 - Equipment - 1 + the options, AUX = 4
1 - EquipmentII - 1 is the standard value, add the amount if you have the options.
From your code above, you last digit is set to 0. I think it should be 1 as thats the standard value.
Hopefully someone more knowledgable will be along shortly to confirm!
Take a photo before you make any changes so you know what to revert back to.
View attachment 143985