I lifted my car 02 cl600 yesterday because I need to pass emissions by the end of May an p0156 code keeps coming up only this code. So from what I read its the driver side downstream sensor... Well thats great to know but there is 2 downstream sensors on each side!!! I dont want to remove the one that does not need to be replaced. I tried looking for diagrams of which downstream sensor to remove for code p0156 and im out of luck so Im hoping that someone can help as i researched the forum and couldnt find anything on this topic for w215 or w220 v12 o2 sensor replacements.

P0156 02 Sensor Circuit Malfunction (Bank 2 Sensor 2) is the code and there is 2 downstream sensors on the driver side, which one specifically should I replace any help or guidance will be great!