The vehicle is a recreation vehicle with a door in the added cabin on a Mercedes chassis. There are automatic extended steps mounted under the door opening. They have failed several times during travel. Sometimes they extend while driving striking curbs and the like. Sometimes they fail to extend and lead to falls while opening the door to exit the vehicle. Tiffin knows of the problem, but it seems to be a design flaw that they cannot fix, and they continue to build units with the same-step problems. The problem seems to be poorly fitting doors that cut through control wires buried in the door jamb. To see similar documented events, visit: https://www.facebook.com/groups/182126562363457 and search on "steps." Please help.