2004 Other Dodge Models HEATING SMELL

if yuo are smelling it while the heat is on then it is either something in your heat duct or a heater core. If you are getting like fog on thewindow or wetness on the window, your coolant should be low. Also look for antifreeze on the passenger side carpet, it will be wet on the tunnel or it will be leaking outside through the a/c drain. You could also have oil leaking on a manifold causing the smell. A mechanic should be able to diaznose it fairly quick..