I follow the instructions in a youtube video. In meinem Fall, the key does not work to turn on the car. I do not know if there is another consideration to do it. Just work for open the door, i put my car into amazon and it suggested that for my model car in year that this key fits which it does but the transponder didn’t sync up to my car. So if you do buy a fob key make sure you know where chip kit or have a key fob number on hand. This worked perfectly after coding, the transponder and cutting the key. Vielen Dank. This saved me, hundreds of dollars, Teil, is identical to factory original worked for my into needed use. I programmed the door remote myself.