TL*THE CONTACT OWNS A 1999 AUDI A4. WHILE DRIVING 20 MPH THE CONTACT NOTICED THAT SMOKE HAD BEGUN TO COME FROM UNDERNEATH THE DRIVERS SIDE SEAT. NO FLAMES WERE VISIBLE AND THE FIRE DEPARTMENT WAS NOT CALLED. THE VEHICLE WAS TAKEN TO THE DEALER WHO STATED THAT THE ENTIRE WIRING SYSTEM NEEDED TO BE REPLACED. THE FAILURE WAS NOT DIAGNOSED. THERE WERE NO PRIOR WARNINGS. THE CURRENT AND FAILURE MILEAGES WERE 104000.