When I first got my car at 24000 miles, the transmission needed to be rebuilt after a week and a half, still under warranty.
Have not had many big problems with it since then, just the brakes and scheduled maintenance.
However, I take really good care of my car and after three and a half years of owning it, it started to have problems starting about three weeks ago. I have to give it gas for it to start, and sometimes I have to balance the gas and brake at the same time so it does not die when I am stopped.
I took it in twice in two weeks to the same garage, and they said it might be a problem with one of the valves, but they weren't sure so they didn't fix anything, they just cleaned out the engine. They told me it was running fine. As soon as I get in it won't start again.
So now I am going to take it into a Ford place tomorrow. If anyone has had this problem, please let me know what the problem with your Mountaineer was so I can maybe point the mechanics in the right direction. I will post again when I get my car as to help anyone with this problem in the future.
I have the same problem with transmission and starting. Just had the car tuned up and it still won't start.