[VMRWheels]

Originally Posted by fazman

WARNING - never-ever have anyone jump start from the actual battery in the trunk, you have a positive and negative post that is run into the engine bay from the trunk. USE THE BATTERY TERMINALS IN THE ENGINE BAY to jump start with your BMW. If you do it from the actual battery in the trunk... you will blow out your Junction box and that is a cool $1k to have replaced and recoded to your car.

- Faz

Good info. Ty.