is the AUX ventilation pre set for a certain length of time?

30mins i think? anyway to reduce this to about 5mintes thus less drain on the battery? should be a timer to switch it off.

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3.0D Sport Auto, CARBON BLACK! Grey Leather, Smokey Grey Trim, Running boards, auto dim folding mirrors. 6 Disc CD Changer. Tinted windows. 19" style 132 Wheels. PDC.
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