Have you tried dimming your dash lights a bit? Mine used to flicker really badly, but since I have dimmed them to about 70% brightness, they have not flickered once.
I realise that you shouldn't have to do this, but evidence from all over the world suggests that you won't get any joy by repeatedly taking it to Ford....a bit like that damn heat shield around the cat converter on the st170 that always works its way loose no matter how many times it gets tightened...the rattle is very annoying!
