Where is the Neutral Safety Switch on a W124
 

I tried to clean to the NSS switch as some members suggested due to no start on P position but will start on N position. I got underneath the car but not sure what the NSS switch looks like and where it is located. The only thing I got to go by is that it is somewhere on the driver side, but it is not easy to find if you don't know what you are looking for. Please help.

Just follow the shift lever rod... it is at the foward end of the rod..
You shift the shifter , the rod moves the NSS...