general problems of the 2009 Lincoln MKX

My 2009 Mkx has scared the heck out of us as we thought a bomb had gone off, followed by the high-pitched whine which only stopped after we turned the car off and open a door for it to reset itself. We were driving with kids in the back asleep,, and all of a sudden it went off and we couldn't stand it. Turning the radio off didn't help, turning the ac off didn't help either. We were forced to pulled over in the middle of the night. Since then I can not trust my car won't go off and cause me to hit another car or god forbid something else. It usually happens in the hotter months for the last 3 - 4 years. I've tried to find correlation to something, and all I can think off is the heat causing it to go off.

Door ajar warning light will not disengage even though the door is closed and it also causes my alarm to sound.

Tl- the contact owns a 2009 Lincoln Mkx. The contact stated that the automatic release button failed to respond. In addition, the contact stated that the door ajar warning light illuminated and there were no doors opened. The contact also noticed that the trunk door was not auto releasing upon coming down and which could cause an injury. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 115,000. Djr.

Frequency: once every other day when temperature over 73 f. Electrical: (issue 1) the sound system while in use creates a horrendous sound/bang that sounds like an accident. This causes a loss of driver attention and distraction from traffic. (issue 2) after loud sound, the stereo will lock it self and not allowing to shut it down or anything. (issue 3) after loud sound, the turn signal will flash in a faster paced than normal. (issue 4) after lound sound, air conditioner would not work. All this issues would resolve by turning car off and opening the driver door to reset itself. This is a big safety issue, with sleeping kids in the back when loud sound gets trigger and have to stop in the middle of highway to "reset the system".

2009 Lincoln Mkx vehicle has driver power seat that is unstable and rocks while driving. This causes an unsafe driving condition that makes the foot fall off the brake pedal when braking. Dealer says this is normal. Another defect is the sound system while in use creates a horrendous sound/bang that sounds like an accident. This causes a loss of driver attention and distraction from traffic. Dealer says this is a defect with no fix.