Quote:
Originally Posted by NeilBlanchard
Why is it not smart?
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Because you're using the inefficient gas/diesel engine of the tow truck to do the charging?
Besides (depending on the vehicle design), if you leave it turned on and the drive engaged, it could well decide to keep moving on its own, the way an automatic transmission vehicle will creep if you don't hold the brakes when it's idling in drive.
Besides, at least hereabouts most of the automotive 'tow' trucks actually load the vehicle on a flat bed.