1995 E320 W124 Starting Issue?????????

[BigRed0803]

I have a friend that has a 1995 E320 that will not start, the car will not even turn over it does nothing when you turn the key. I figured it was the neutral safety switch but that didn't fix it. He then had the electrical part of the ignition switch replaced that didn't fix it. I can run a jumper from the starter to the battery and it will start, but I am not getting any juice to the starter when I turn the key. What else could be doing this, I was under the assumption that it had to either be one of those three things; starter, neutral safety, or ignition switch. I am obviously wrong. If anyone has any suggestions they would be greatly appreciated. Thanks