Thanks for the DIY instructions however I was not able to open the door after a day's effort. So I called BMW and got the contact of the towing company. I explained the situation on the phone and told him to bring a locksmith along. The locksmith magically opened the trunk in less than 5 mins. His procedure was similar to mine except that I was concentrating on the central lock and the inside door handle. My car battery was good, the remote access was not working and the door lock was kaput. If you are in the similar situation, I will be happy to pass along the lessons learned. I paid around $180 but it was well worth it after having tried myself in scorching heat.