I've owned my 2010 Panamera 4S w/60k miles about 8 months and overall it's an awesome car. I've had an occasional issue which so far has occurred only in the Downtown area Chicago. I don't know if the tall buildings create interference in some manner with the alarm system like it can with GPS. But whenever I'm in the downtown area the key fob will not deactivate the alarm system but the doors will open. The first time it occurred it ended up being a 3 hour stressful and embarrassing affair. I was sitting there looking like a doofus with the alarm going off every 5 minutes. Because the car was new to me I was wasn't aware the dummy key could be pulled out and by inserting the key fob the alarm would be deactivated. After walking to a nearby Walgreens and changing out the fob battery didn't solve the issue I ended up calling a tow company to have the car towed. The towing company wouldn't tow the car because it's AWD and the ignition could not be turned on to disengage the transmission. Ended up climbing through the rear hatch to manually release the trunk with the cord hidden behind the hatch light...to disconnect the battery...which solved the issue. I thought it may have been a fluke occurrence but it still occurs...but so far only when I'm Downtown Chicago. After about 2 alarm cycles the dummy key will pull out and inserting the fob has me on my way...but still not convenient. Has anyone else had this issue with an effective solution?