audi a6 c6 taillight problem

hi. i am newto the forum. I diceded to start modding my car. I have the originial midline taillight. the taillight that is 7 pin and have the breakelight that is led but the rest of the lights is bulb. I started with the rear taillight but now that i have swapped the taillight the car starts to complain about that there is no taillight. i have checked the numbers in vag.com system and added the 131072 code but still nothing. when i added the highline code it sucked the battery of the car in just 40 min of. is it possible to have an orignal code that is 0205041. isnt that to high from the start?
sorry for so many questions. I got info from v8a6 to write at this forum and ask about the problem. here is the link to the new taillight.

https://www.sw-tuning.de/en/SW-Celis-LED-taillights-Audi-A6-Sedan-04-08-black-smoke-Lightbar-for-7Pin-Series-LED::34565.html?MODsid=b04e1f9166b462e8ac1b87fb92f47851

Best regards