2007 Chrysler Aspen 4X4

MY 2007 ASPEN 4X4 NOW HAS 35,000 MILES ON IT. RECENTLY THE BRAKE LIGHT INDICATOR ON THE DASH PANEL HAS COME ON AFTER STARTING THE CAR AND DRIVING BETWEEN 1 AND 10 MILES DISTANCE. WHEN THE CAR IS TURNED OFF AND THEN RESTARTED, THE LIGHT GOES OUT. THIS IS REPEATABLE EVERYTIME THE CAR IS STARTED. ALSO, SINCE THIS CONDITION BEGAN, THE BRAKE HAS 1. REFUSED TO DISENGAGE AFTER APPLYING THE BRAKE (ONE TIME OCCURRENCE); 2. SUDDENLY BECOME EXTREMELY RESISTIVE WHEN BREAKING. THIS IS AN INTERMITTENT CONDITION THAT HAS HAPPENED NOW 3 TIMES. WHEN APPLYING THE BRAKE THE PEDAL DOES NOT INCREMENTALLY DEPRESS BUT BARELY MOVES DOWNWARDS AT ALL. BECAUSE THIS CONDITION IS INTERMITTENT THERE IS LITTLE TIME TO REACT AND PRESS DOWN ON THE PEDAL SUFFICIENTLY TO SLOW THE VEHICLE BEFORE REACHING A STOPLIGHT OR OTHER VEHICLE OR OBJECT. (I HAD A NEAR ACCIDENT TODAY WHILE RETURNING THE VEHICLE TO THE SHOP A SECOND TIME FOR REPAIR.) THE CHRYSLER DEALER IN MY AREA FIRST INSPECTED MY BRAKING SYSTEM AND TOLD ME THAT THE BRAKES WERE FINE AND THAT THE MASTER CYLINDER JUST NEEDED TO BE TOPPED OFF. THE DEALER HAS JUST CALLED ME BACK (THE CAR IS THERE NOW) TO SAY THAT THEY COULD FIND NOTHING WRONG. I'VE TOLD THEM THAT I CANNOT EXCEPT THAT ANSWER AND THEY REPLIED THAT THEY WILL CONTACT THE MANUFACTURERS REP FOR FURTHER TECHNICAL ASSISTANCE... *TR