My hope is that you’ve found this posting before AAA, or other form of assistance, has come to rescue your BMW with a dead battery. I know you only have one hour to leave work, grab the kids from practice, and pick-up dinner, but stop and just have your BMW towed. DO NOT jump-start the car and DO NOT let any roadside assistance service install a new battery in your BMW. It can be the most expensive battery or jump start of your life.
BMW’s built from 1999 through about 2003 do not respond well to a jump start, and pretty much every BMW built after 2004 needs to follow an exact procedure in order to change the battery properly. While we’ve been aware of this for quite some time, a recent customer’s troubles has exemplified what can occur if someone tries to change a battery when they are ill informed.