On the cars that need emmissions testing, I also drive them for about 45 minutes to an hour before testing to thouroughly heat the cat. If the car has to sit for a bit before they get to it, the cat should still be retaining some of it's internal heat.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.