So I have done the test, if I bypass the NSS the car will start and I am off down the road. I ordered a new NSS installed it along with new shift bushings and... a big NOTHING!! The only thing I gained was now I have reverse lights when I put it in gear and it shifts through the gears smoother. WHAT CAN I DO??!!??!!! I am tempted to hook up a push button started switch and just bypass the NSS all together. I would rather keep this as original as possible. The PO did manage to do a huge wiring nightmare but I can rule that out with the bypass test.

I am all ears

Some car information.
1990 300E 2.6

What are the chances of a bad NSS that is brand new???

Very high -- especially the Febi switches.

I did this replacement (with a Febi switch) about 2 years ago and the alignment took an eternity and the switch failed shortly thereafter. I replaced it with the original the OEM switch (which I thankfully saved) and it worked with no alignment and is still going strong today -- with just intermittent failures in Park during very cold weather.

If you buy an MB switch, your problems will be solved.

__________________
2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black

Thanks.