I don't worry too much about such things. If I thought I was wrong, I would say so and take my ticket, but I'm not going to be quiet when he is wrong just because he is a cop. (I think as I am getting older, I am less inclined to put up with BS)

But I do know what you mean. I have thought many times about installing a recorder in my car, so I can challenge a cop in court if I have to.

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2006 X5 Sport 4.4i