I have a 2006 M Roadster with a new battery and for some reason in a matter of 3 weeks of not running the battery will be dead. I’ve gone to great lengths to make sure everything is off. It starts ok when i jump it. Any ideas? I’ve had this car for 10 years and it resides in a heated hangar in the winter. Thanks!
This would be hard one to say with out having a draw test done to the vehicle. A draw test will tell you if there is something drawing the battery down. From there if the draw was larger than spec you can narrow down to what is causing it.
