i have a 86 735i the battery went dead after a long weekend away with my roommate (due to me leaving my radar detector on) I took the battery out charged it and put it back in ever sence then the mode selector switch just springs back to economy when i try to change it and i only have reverse and 3rd gear. i read the owners man and it says it due to an electrical malfunction but i dont even know where to begin to look for what is wrong/how to fix it.. any help i can get would be greatly appreciated
Thank you in advance
Rob "the Ogre" Schleben