If you do not down shift and you come to a complete stop is will down shift for you and the lowest gear it will go into is 2nd you can down shift and it will go into 1st to take off
as for upshifting if you do not shift yourself it will shift it self when you reach near redline..

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2003 4.6is Estoril Blue
2004 3.0i
2005 4.4i Sport (sold)