I totally understand your problem with Freightliner. They have had this service problem before the covid issue. Dealers have told me corporate wants them to consider everyone on a first come first service basis regardless of appointments that is why there is a line up in the morning. It is best to find a dealer that will honor your appointment time. What I do is call my dealer for a 7:00am appointment,show up the night before,and camp in their lot. I never had to wait over an hour. The dealer i use is River States Freightliner which has 3 stores in Wisconsin.