NHTSA Complaint #11362920 — 2015 VOLKSWAGEN JETTA

WHILE CRUISE CONTROL IS ON AND CONTROLLING THE VEHICLE SPEED, THE SPEED SETTING WILL SOMETIMES (I.E. UNPREDICTABLY AND INTERMITTENTLY) INCREASE THE SPEED TO THE CLOSEST 5 MPH INCREMENT WHEN COMMANDED TO DECREASE THE SPEED TO THE CLOSEST 5 MPH INCREMENT. I HAVE BEEN ABLE TO REPRODUCE THIS ERROR DOZENS TO HUNDREDS OF TIMES BUT I CANNOT DISCERN A NOTABLE PATTERN AND THE BEHAVIOR SEEMS UNPREDICTABLE. THIS IS NOT A NEW ISSUE BUT HAS EXISTED SINCE I PURCHASED THE VEHICLE NEW IN 2014. EXAMPLE: I AM DRIVING AND SET THE CRUISE CONTROL TO "ON" TO CONTROL THE VEHICLE SPEED AT 63 MPH. I PRESS THE BUTTON THAT IS SUPPOSED TO DECREASE THE SPEED TO THE NEXT LOWEST MULTIPLE OF 5 (60 MPH) BUT IT WILL INSTEAD INCREASE THE SPEED TO 65 MPH. THE 60 TO 65 MPH RANGE IS SIMPLY AN EXAMPLE AND THE ISSUE EXISTS AT ALL SPEEDS, AS FAR AS I CAN TELL.