2005 330 CI
I have a BMW 330CI 2005 model. Had not used it for 2 months; battery is completely dead. The car is locked and I don’t see even the red light blinking (locking). I do have external battery and jumper cables but can’t open the trunk as it has no keyhole & I can't get in the car. There is a key hole on the passenger seat but it just does a full turn when tried manually. Please could you help me to open the car or trunk, or anything else to solve this. Thank you.