We have a Mercedes GL450, 07 model, that I want to flat tow behind the bus. This is a "one time" deal and since we usually tow a trailer, I don't want to spend $$$ outfitting the GL with a tranny pump. So, my method is to start it, put it in neutral, and let it idle as I flat tow it. It's a 4500 mile round trip. I have done this successfully with an 03 Ford Excursion (well, except for one time when it ran out of diesel on a really long haul across Montana and Wyoming, which caused the tranny to die once it stopped running)
I have no qualms letting this thing idle forever, but would like to solicit opinions on the effects on the GL.
Of course the Mercedes dealer knows nothing....
Thanks in advance..