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Message: <blockquote data-quote="jaleeks23" data-source="post: 18329" data-attributes="member: 8431"><p>dear all,Last night was the first time I saw this happening after owning the E39 for 2yrs. Last night, I arrived home at 7pm+ and parked the car in the porch and never drove since then. I also always open the bonnet to let out the heat whenever I reached home and close the bonnet before going to bed. At about 11.30pm, my friend came to look for me and we were chatting at the gate. As I always reverse park my car in the porch, we were close to my car's bonnet. BTW, the bonnet was closed then. Suddenly, the aircon fan started! It was running at low speed for about 2-3mins, then it switched off itself.Question is1) Is this a "hidden" feature? (I remember reading somewhere in this forum but couldn't find the thread anymore and couldn't determine if it's a problem or feature)2) Is there a reason for the fan to auto on/off? - to test the fan or ventilation for the engine or.....?3) I doubt it's shorting somewhere cause it just auto on and then auto off. (but I will still check with mechanic and aircon fella)Really hope owners and sifus out there can explain this hidden feature or problem. Thank you.</p></blockquote><p></p>