Both BMW and Mecerdes used to test the RF immunity of their cars electronics in our transmitter site tower feild-esp on the dirt roads going by the transmission lines.Those German guys from both companies were very nice to talk to.Their cars had the oval like license plates on them.Haven't seen them here in years.They were especially fascinated by our German built AEG Telefunken transmitter.S4005 model-500Kw.And it was running at that power when they were testing their cars.We didn't get any rides since we had to operate our transmitters.Would have been neat.