disconnecting battery ? I have not started mine in over a month with temps down below 20f & it started right up . I will try again tomarrow after I dig out the trailer from snow about3ft deep drift has been below zero the last couple days here in mich. will head south soon !!!
Does your vehicle have the Immobilizer? That is a highly efficient battery drainer. When I was ordering my M3W, I discussed it with my dealer and he advised against, for that reason. Mysteriously, the car was delivered complete with Immobilizer...