THE NAVIGATION SYSTEM SUPPORT FOR DIAGNOSTICS, PARTS AUTHORIZATION, AND PARTS EXCHANGE REQUIRE CONTACTING THE PROPER SOURCE.•TOMTOM NAVIGATION HELP DESK AT 866-486-6866 FROM 7AM-11PM (M-F) AND 9AM-8PM (SAT) EASTERN STAN-DARD TIME.NOTE:ONE OF THE FIRST STEPS FOR TROUBLESHOOTING THE NAVIGATION SYSTEM IS FOR THE CUSTOMER TO CALL TOMTOM. IF THE TOMTOM CALL CENTER CANNOT SOLVE THE CUSTOMER’S PROBLEM, THEY WILL PROVIDE A CASE NUMBER TO THE CUSTOMER THAT CAN BE REFERRED TO IF NEEDED. SERVICE ADVISORS SHOULD GET THIS CASE NUMBER FROM THE CUSTOMER IF THE VEHICLE COMES INTO THE DEALER FOR FURTHER DIAGNOSIS SO THE TECHNICIAN CAN HAVE IT WHEN CALLING TOMTOM.