WHILE DRIVING IN A CITY STREET AT APPROXIMATELY 20 MPH I HAD MY WINDOW WIPERS ON DUE TO SOME POLLEN ON MY WINDSHIELD. WHILE WINDOW WIPERS WERE ENGAGED I APPROACH A DOWNWARD HILL AND HIT NOTING BUT SUN GLARE BLINDING ME I PUT MY BRAKES ON BUT BY THAT TIME MY SUV SLAMMED INTO THE CAR IN FRONT OF ME. THE EMERGENCY BRAKING SYSTEM DID NOT ACTIVATE