A mean-spirited BMW factory rep and the false promise to repair the car

So as the service manager and I traded phone calls for a couple weeks, the BMW factory rep was scheduled to come and review my car and the warranty claim.  When he showed up, the service manager called me and said "the BMW factory rep has voided your warranty."  I said, "he cannot void the warranty.  Read the plain text of Magnusson Moss."  This escalated into some charged conversations about Magusson Moss and BMW's reported practices of "voiding warranties" when customers installed after market parts on vehicles.  I also took the time to point out that BMW dealers sold and installed aftermarket superchargers pursuant to an agreement with Dinan Motorsports.  The service manager confirmed that his own dealer sold and installed Dinan superchargers in E46 M3s but he also explained that BMW of North America had recently began a spat with Dinan because BMW was in the process of rolling out an expanded BMW Motorsports aftermarket parts line which would compete with Dinan aftermarket parts.  He told me that as a result, BMW of North America was discouraging dealers from continuing to sell and install Dinan aftermarket parts.  

Frustrated with the Service Manager's panicky calls, I asked to speak directly to the BMW factory rep.  It was hard and required me calling the BMW of North America Corporate Office.  After navigating the BMW bureaucracy, I eventually managed to get a call from the BMW factory rep (he too has since moved on from his position).  

When he finally returned my call I was eating lunch at the Olive Garden (love the soup and salad lunch there!).  I had to take the call outside because the factory rep was very angry and yelling and started the conversation by telling me that he did not appreciate me calling his superiors and wanted the name of my commander so he could call my superiors!  I replied, "why on earth would you want to call my superiors?  The US Government did not lease this vehicle, I did in my capacity as a private citizen.  He replied, well if you want to get me in trouble with my superiors, I was in the Army and know how to get you in trouble with your superiors.  I replied "wow, so you are using a federal communications system to call me and threaten and coerce me from calling your company and asking them to honor their new vehicle warranty?".  He hung up on me.  "Nice", I thought.

Upset at his treatment, I called the General Manager of Bert Smith BMW and explained to him what had transpired and asked him for his help.  He was nice and agreed to help.  A day or two later, he called and said that BMW of North America had agreed to pay for the "vanos" repair.  I was pleased and thanked him for his help.  The same or following day, I received a call from the factory rep who told me that he would not cover labor, only the "vanos" part.  So, I called back the Dealer General Manager and explained.  I told him that it was incredible to me that BMW would honor the warranty only as to the part and not the labor.  He agreed with me and promised to call BMW to inquire.  Later that day he called my cell phone and said that he had managed to get BMW to honor the warranty for the labor to install the new vanos.