Just thought I would give you an update on our C-Max hybrid for towing. After going to dealership and discussing issue we have an appt to have the computer reprogramed. Some 2013-2014 hybrid or energy cars built before 7/22/14 may exhibit a discharged 12-volt battery or a Service AdvanceTrac cluster msg after towing behind a recreational vehicle. This publication came out Sept 2014 apparently to the dealers. I would ask about your cars if this is happening to you. We will get it reprogramed and let you know if this works. We won't be towing until mid-January.