Interior motion sensor not working
Hello everyone. I've owned a 2009 650i for about 6 months now. I brought in my car for service at the dealership because the interior motion sensor wasn't working. They told me it was. I brought the car home dropped the top set the alarm. I dropped a towel in both seats and moved it in different direction with no results. I was even able to touch the red sensor, reach into the vehicle and move things around with out activating the alarm. Is there something I'm doing wrong or missing. The vehicle was there for a full day I really don't want to bring it back. I would appreciate any help. Thanks in advance .