Dodge 2008 Charger SRT8 - Manual (Page 346)

If you must use the accessories (wipers, defrosters, etc.)
while being towed, the key must be in the ON position,
not the ACC position. Make certain the transmission
remains in NEUTRAL. Towing This Vehicle Behind Another Vehicle With
A Tow Dolly
The manufacturer does not recommend that you tow this
vehicle on a tow dolly. Vehicle damage may occur.
344 WHAT TO DO IN EMERGENCIES