I like the idea of an RF controller, since we have two German SUVs which are difficult to wire [unlike my old Ford trucks, plug and play]. No wiring is correct. Obviously trickier if you regularly pull two trailers, and would have to move the trailer mounted unit back and forth ....

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.