The instructions, tips and procedures come from trying myself, trail-and-error, from car forums in all countries and languages, from Ross-tech and VCDS distributors.
I don’t accept any responsibility for things going wrong when changing codes to your car or using procedures written here.
Usage of this information is at your own risk.
Make sure your laptop operating Vagcom / VCDS has a full battery or is powered enough. (when the laptop is powered down during a procedure you could damage the cars hard- or software for good.
Before changing codes, write down the original value.
Always start with an AUTOSCAN. In the newer versions of Vagcom / VCDS (version 9 or higher) all long codes are saved to a file on your laptop.