This palace is actually located in Potsdam about 30 minutes away from Berlin. It isn't just one palace either but a collection of around 10. I ended up parking by the Nues Pallais building and buying a ticket that allows you to enter all the palaces in the park. It isn't on the list of options but if you ask about it you can get it. It costs 19 euros per person. I found it odd that it wasn't listed but like with the Charottenburg Palace there are a lot of options to choose from. Both palaces are under the same company as are almost of all them in the Berlin area. It is roughly 2 km from one end of the park to the other, but the map you can pay 2 euros for makes it seem like it is a lot further away. There are markers that you can see that give you a direction and distance to a certain building. I would recommend that you get there early so you can check out all the buildings. The park will stay open until it gets dark, but the palaces close at 6 PM. I was there for over 4 hours with my wife and daughter and we still didn't get to see a few of the buildings in the park. The park is also laid out beautifully and there are so many paths you can take. You can walk around in the park for free and there are sections of Potsdam University on the park grounds as well.
If you own or manage Sanssouci Palace, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.