hi new to this recently bought a 207d that has been converted to a camper but the ignition piece that you pull out to start is gone ive been told its apull start you pull out to put power to heater plugs then push in and start with the key i dont know what this is called and definatly havent a clue where to get one from aparently it reducers 12 volt to 9 volt for the heater plugs any help would be really apreciated many thanks and happy new year to you all