Juliano, it definitely does not say star nav. Go to
http://www.visit4info.com/details.cfm?adid=298 88
and listen to it, again and again if you have to. Then you'll see/ hear that its sat nav. Like the 'sat'ellite 'nav'igation system that comes with the zafira, as opposed to the star nav system that fighter class star cruisers have, (snigger)... And you don't need to drive to know that one... Star nav sounds more realistic? Oh dear... Lets move on...
Neural_jam, you don't need to understand the context the words are used in... You just need to know that vauxhall and loweworldwide (advert producers) have both confirmed that it is 'overtired'... If you don't believe that, contact them... For an explanation of why the word overtired works in this context, read my, or brachiopods, or ed5079's previous posts in this thread.
ed5079, thank god some of us are still walking on our hind legs and trying to pretend to have intelligence above plankton levels.... Keep up the good work setting people straight!
TO ALL FUTURE POSTERS:
Please read all previous posts in this thread cos this one must now be allowed to lie down and die... All questions are answered... I'll never forgive vauxhall for this advert, ever...