300SD won't start or crank

[otto huber]

Last night my car decided not to start. When the previous starter was on the way out it gave warning by having a split second delay before cranking the engine, the current starter's failure was out of the blue.

This morning I installed a used starter that Sixto gave me which we tested before he gave it to me. I have the same response now as I did last night, just a little ping sound coming from the center console, but nothing else. The battery and alternator are good. The car is in Park. I'm guessing neutral safety switch at this point. I have a spare used one in my garage. How can I test or bypass the NSS that is currently on the car? Thanks