It was a few days after I bought my '87 560 SEL that I opened the ashtray for the first time and discovered a built-in radar detector. It's hardwired in, all the lights function, but it doesn't work. The brand- or model- name is "SS", (there are no other visible names on the unit. It's an exact fit in the ashtray, as though it were designed for it. Does anyone have any information on these units, particularly information on their wiring and the location of the radar sensor(s). If possible, I'd also like to know how it rates vs. other detectors. Anyone?