Its not a mercedes made product I don't think. I know i've seen them elsewhere but can't remember where i'm afraid. I saw a few S class' with them last time at the dealer, I thought someone somewhere had a lapse of thought in the planning, as they've hidden the antennas for the radio and TV in each pillar, and I think the rear window also has some sort of ariel inside it. Why they couldn't include the GPS antenna too I don't know....