Originally Posted by soitgoes

I haven't been to Bremerhaven, but Hafen would be the harbor/port. (Indeed, that's what Bremerhaven means. )
There will likely be a taxi stand right outside the train station and there's no reason not to take any marked taxis. Note that though it is common to take the first taxi lined up, you have the right to choose which taxi you want. If for example, you want a taxi that takes credit cards or for whatever reason, you can pick it.
I can't think of any way to earn M&M miles unless you find a codeshare.