There is a small section of non-fimled glass where a radar detector will function. If you look at the windshield from inside the car with bright sunlight, about 2.5" up from the dash a little right of center, you should see the spot where to mount it. MB did send out a bulletin about that but I can't recall from memory exactly where the spot is. I'll check for you to be certain though!

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Regards,
Aaron