Engine Cooling System problems of the 2003 Mercury Mountaineer

I have 2003 Mercury Mountaineer and I have had it since February 2007. I have had numerous problems with it and the last problems was the breaking point. I have three more years to pay for this vehicle and I want something to be done about the problems with this vehcile. Ford should be held responsible for this vehicle and fixing the problems associated with it. I purchased this vehicle from community Ford in new albany, ms in February 2007 with 45,000 miles on it. I couldn't get an extended warranty or any warranty with the vehicle I was told. After a year, I had to replace the front end and it was $500. 00 at george's tire services. I took it in due to this noise coming from the front and I was advised that if I didn't have the work did it would lock up on me while I am driving and cause and accident. I noticed that my structure body:hatchback/tailgate has cracked completely. My seat belt on the driver side in the back don't work. My engine cooling system aircompressor has went out and I have electrical problems where my oil gauge is constantly saying it's low. I have my oil change every 3000 miles. I am hearing this noise in the rear of the vehicle and I don't know what it is and can't afford to get going to Ford to see what it is. I have been smelling this burning coming from the under the hood and I don't know what it is either. My lastest problem is my transmission is going out and I have had this vehicle for two years and I have three more years of payment on this vehicle. My transmission cost me around $3500 and I don't have any warranty on it. This is a lemon I have purchased and I think something should be done about it.

The heater stop working 3 different times, the first time they replaced the thermostat, 2nd could not find anything wrong, dealer thinks might be intake manifold or head gasket, 3rd time say must take it apart to figure out but pressure test are within normal range.