Trunk Auto Close not working
 

Hi All, I am brand new to the forum. Hope I'm in the right section. I've got a beautiful 2006 E320 CDi. It has about 95k miles and is in great condition. The other day, a friend got out of the car and retrieved something from the trunk. He did not push the red auto close button but instead, manually closed the trunk. Auto close has not worked since then. Here is what I've done to try to locate the problem. I disconnected the battery, waited, and then re-connected it. I checked every fuse I could find in the car. All are good. I removed the drivers side panel in the trunk and looked for any obvious damage or broken wires. None are visible. I put my hand on the black plastic (controller) box just behind the closer motor and I feel a slight click when I press the closer button. A friend put his finger on the motor gear and feels a slight movement when I press the button. That's all the tricks in my diagnostic bag. Could it be an auto reverse blockage (if there is one)? Any help or guidance would be greatly appreciated.