This thread answers most of our questions but to be complete.

What day of the week is this going to happen on? exact times? arr 0715 depart 1620 hrs.
Where are you flying in from-Munich
Which airline are you flying in AC and out on LH to Frankfurt.
Will this be one ticket or two- One
What nationality are you and what travel document will you be using? Australian and Australian passport.

We would like to catch the train downtown and have lunch there and or take a harbour cruise.
Would catching a train from the city centre say 120 minutes pre our flight departure time be safe?