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Q: How do I bypass neutral safety switch, starter lockout, and security lockout? on 1997 Mercedes-Benz C280

My 97 c280 does not engage starter when key is turned. I've replaced tumble, repaced battery, locked and unlocked with original key and remote, jumped starter and it engaged but no start (key was in the run position)
This seems to be a common problem but I can't find anything that actually tells me how to fix it. I want to bypass everything possible so I can start the car. It's going on the for sale program as soon as it starts. I'm done!
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