The vehicle buzzes constantly when travelling over 100km/h

The issue maybe:

1. Company configured speed limit has been set to 100 km/h. Contact your Fleet Manager or Haddtrack using this form to review the Company Settings.
2. The posted speed limit is 100km/h but the Driver is travelling more than 107 kms per hour for more than 5 seconds.

Also review the videos on Haddtrack Driver Training Portal.