Air Bag On-off Switch problems of the 1999 Suzuki Grand Vitara

Airbag - when it's below 40 degrees outside the airbag light stays on. Windshield - makes a howling noise when speed exceeds 80 mph. Passenger seatbelt - will not release when someone is sitting in the seat. Air condition - you have to constantly press the a/c switch and it will eventually activate. Air conditioner - the fresh air/recirculation lever does not stay on recirculate, it moves by itself back to fresh air. Front axle - the 4wd always pops back into 2wd all by itself. The axle leaks constanly. It's been replaced twice within 10000 miles.