Diesel- thanks! I just put in a brand new, Mercedes NSS, but, it could be faulty. It's possible that I've installed it incorrectly, which is going to be my first easy test. After that, I'll try your suggestion. I'm also hearing that I may have a failing starter.

The thing that is unexplainable is that currently, I've been able to key start the car in park after driving it around some (I'd been bridging wiring in a box above the wheel well to get the engine to crank) If I can key start it at all in park, doesn't logic say that I have a working NSS? Or is it possible to start in park, after driving around a bit and shutting down, even without a working NSS? Please advise if you know...

thank you!!