Battery Dead Problems of Hyundai Entourage

We purchased our 2007 Hyundai Entourage new in July '07. Within 2 months we began having problems with the electric sliding doors on both sides. Sometimes the doors do not close all the way, or close and reopen. Sometimes the doors won't open with any method, keyfob, buttons, or manual. The doors sometimes make a sound like there is grit in the track. We have taken this to the dealership multiple times and even showed them video of it happening. Since they can't reproduce it there has been no work done to fix it. We also have intermittent battery drain. The battery has been dead 5 times for no apparent reason. The passenger side mirror will often not adjust unless it is moved to the bottom outside corner first and then it can be adjusted. The memory for the seats/mirrors are often lost. To me these all indicate a problem with the electronics in this vehicle. Dealership has not been able to find anything to fix. We also have experienced a shimmy at highway speeds. Replaced the tires and had them road balanced to remove the worst of the shimmy. Independent garage did this and said the tires and the rims are fine. It's been close to 3 years and we are still experiencing all of these issues.

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Battery just dies I. E. Becomes fully drained & dead. Has happened three times so far.