Keyless pad on driver door is not functioning properly. last 2 buttons lock vehicle, but head and taillights come on. sometimes they stay on for 30 seconds, other times they stay on all night, and drain battery. lincoln has told consumer that it was a characteristic of vehicle. vehicle has been to dealer 5-6 times for repair, but unable to remedy.*ak the field service engineer stated that there is no remedy for the problem unless the manufacturer redesigns a new modular. *yh