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      08-04-2008, 10:52 PM   #7
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It was also my understanding that with bi-xenon headlights (aka headlights that have xenon low and high beams) that the halogen bulbs on the inner side of the clusters were used for flashing your high beams. If you do a temp flash (push the lever forward) it flashes halogen high beams, but if you turn on long term high beams (pull lever back towards you, and switches in place) then this activates the bi-xenon high beams and a lense moves into place over the xenon light to re-focus it.

This was the generic function of most bi-xenon style headlight clusters.

Its probable that the other explanation above (from the manual no less) is also true as a secondary, or primary if you prefer, function.