I just bought a 2009 MKS with adaptive cruise control. If I turn it on right when the engine starts, it brings up a message "Cruise on, radar ready". If I wait more than 5 or 6 seconds after starting the engine, it says "not available".
However, any time I try and use it while driving, all I get is the message "Cruise not available".
I have took off the plastic panel that covers the radar module, and everything looks nice and clean there. I even unplugged the harness and checked to make sure the connection was clean and tight.
I've read that some later year models have a TSB out concerning this, and that the dealer can re-flash the computer to fix the issue, but the TSB doesn't apply to the 2009 models. I have also read that Ford started buying the adaptive cruise radar units from a different manufacturer starting with the 2010 models. The radar unit for the 2009 models is ridiculously high priced. If the module needs replaced, I probably wont spend $1500 for a new one.
Anybody else had this problem?