Here's the rest of our 7.5 hr wiring/hitch installation story. Received a call from the service dept first thing this am offering to lower the bill to 4 hrs of labor. I told him that wasn't good enough, that I had made calls to dealerships in other cities (the next closest one's are 1 hr and 3 hr drive from here) and that I had been on the edge forum. To bargain further we had to go down in person, which we did. We were then offered the same 4 hr labor bill but they would give us a free service at 24,000km which is currently worth $220. We accepted this as it was a better deal for us than dropping the bill to 2 1/2 hrs. Just goes to show that with a little research and standing firm a happy ending can happen.