Originally Posted by rtdavew
Do I need to install a battery cut-off switch? If so, given the location of the battery is there one that can be attached to the dash? Also how much play should be in the bungee cord for the steering wheel. Will be towing with a Sprinter based class B.
Well Sir, I can't really answer any of your questions due to the fact that I've no experience with Smart car towing. But, if I may suggest, there's some members either on this forum or, on RV.net called "John and Angela" that tow, two different Smart cars. Now, if I'm not mistaken, they use a trailer for the Smart. But, the trailer is a stout, small, just a hair larger than the car it's carrying. And, when they get to a camp site, the Smart is unloaded and, the trailer is hooked to the Smart and it tows it's own trailer to whatever place they store it in, while camping.
They've had their Smarts now for quite a while and, if I'm also not mistaken, both are diesels. But, don't quote me on that. John brags about his "70 mpg" every now and then when someone brings up MPG on any vehicle. I don't blame him, I'd brag too. I don't know just how much John can help you but, if you can find his user name "John and Angela" and send him a PM, he might be able to answer all your questions.