Radio unit used in the video https://amzn.to/2H8z3DL
Here is a quick tutorial on how to remove your factory radio and install an aftermarket head unit in your Mercedes Benz R129. Model of car is 2001 Mercedes Benz SL500. This was an easy plugin and play unit.
My Video Camera GoPro Hero 3: https://amzn.to/2MnMZO1