https://www.rv.net/forum/index.cfm/f...print/true.cfm
Before we go trying to prove or disprove what we read on the Internet ("...it must be true then"), I am of the belief that if the auto manufacturer spells out a step-by-step procedure for towing the vehicle they designed, I am going to follow their procedure.
In the case of my vehicle, I can see that the transmission is electronically controlled as the dash display tells me if the transmission is "ready". It seems to me that leaving power on the vehicle in any fashion leaves open the possibility of that transmission doing something different than "Neutral" while towing.
Adding an Auto or Manual switch on a main battery lead will satisfy the requirement for little expense compared to the whole towing package. If your aux braking system requires power, that's easy to wire directly to the battery and/or a charging line from the RV.
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