general problems of the 2012 Ford F-550

Diesel exhaust fluid system failed shutting down my vehicle while driving and I had to be towed to a Ford dealer. This is a safety issue and could have caused a major accident on the highway. I never got a recall notice about this major problem. Now I am told I would have to spend over $5000. 00 to get this problem fixed. Ford had gotten many complaints about this issue. They should pay to have this repair done. I only had this vehicle for a short time and paid over $59,000 for it. I tried to contact several Ford executives over two weeks ago and heard back from none.