ik heb antwoord vanuit stockholm
voor iedereen die het ook wil weten vind:
The Star Princess is supposed to dock at Stadsgården 167 but it could be changed.
From Stadsgården 167 it´s approx 30 minutes walk in to the Old Town.
In the Old Town, a lot of the streets are cobblestoned but usually it´s not a problem to visit with a wheelchair.
You could also go by public bus but to get to the bus is approx 10minutes walk and then the bus ride takes 3minutes and after that 5minutes walk to the Old Town.
Remember to buy a bus ticket before you enter the bus. There is a tourist office at the cruise terminal that sells tickets (30 SEK/person one-way).
A taxi to the Old Town would be approx SEK140.