The buzzer should be attached to the side of the cruise amp on your car. The cruise amp is bolted to the brake pedal pedestal, silver box about 6x4. The buzzer will be mounted on the inboard side. You will have to pull the driver's side lower panel to access.
'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.