Car Battery Dead - car dealer says it is MH issue

It depends on how your toad was wired up and what type brake system you are using. Our MH is wired to charge the car while driving since I use a Brake Buddy system. I do find it very hard to believe however that your car battery would go dead in that case since the MH batteries would have to deplete as well. We've sat connected for several days and have never had the toad battery go down. .