Hello I have a golf mk6 2012 and I recently upgraded my headunit and I want to sell the old one for cheap. The old radio in my car it works plug and play but in other cars it needs a code which I don't have because I have bought the car second hand and I don't have a manual or something that I can check the code there. It is a Bosch unit with the serial number : VWZ1Z2L3278152. I would appreciate any help in this topic. Thanks in advance!