The trunk is ajar about a half inch or so. I found a MB TSB stating to check the pneumatic pump under the rear seat to see if it makes any noise after closing the trunk. With the rear seat bottom out, I found the pump. It does make a whirring noise when the trunk is closed. The TSB says to look for the red vacuum hose which has probably come disconnected from the pump. The problem is there is no red vacuum line off the pump, only yellow and gray lines. Does this mean a new pump is needed? I hate this car.