Iphone 4 works with radio, I phone 5 doesnt
I have read that most adapters will charge the 5 but not play music unless it has the 3.5mm plug.  People then complain that doesn't work well unless you take the case off.  Read the reviews of these adapters.  It looks like you and I may have to get a bluetooth adapter for our t1809s.  Look up Coolstream Duo or go here.  We will have an opportunity to hide the bluetooth behind the console using this.