Help, there is a 3 week long heat wave and for some reason my 1993 190E constantly puts out heat from the defroster vents, under the windshield and out of the the far left and far right vents. the only air cones fgrome the center vents and the windows.... Another promblem I am having, is my tranny seems to be bangging into gears, in first and second. First the tranny hessitates, creating high RPM's. Then BANG!! Can Any one please help me?