Not sure whether this is relevant but this is a problem on the C-Max too. Problem was a faulty seal on the microswitch in the boot release which let in water and caused corroded contacts, and Ford have a replacement for it. There's a TSB for it. You can also fix it yourself if you're feeling a bit adventurous, which is what I did.Re self unlocking Focus...Car was in with dealer a full day and they didn't cure it. They said Ford only knew about the C-max, ( As you mention, thanks. )They are now ordering a boot catch to see if it cures the problem. They never even got to look at the other fault