Parktronic Help Needed

[JNLeChevet]

I have gone over my "new" 99 S600 and brought it up to snuff with the exception of the parktronic system. When the ignition is turned on, the system lets out a long beep, the two red lights on the indicators light up along with the frame, and after a few seconds, it shuts itself off. Turning it on again results in the same problem. The DVD manual that I bought from MBNA only describes this as a "self test" that indicates that there is a failure someplace - no further information or diagnostic procedures.

Does anyone know if an adept DIYer with an electronics background can troubleshoot the system and how to go about it - isolate the problem to a component at least?

TIA
Jon - 1973 to 1999 MBs