We were 7 people to stay in 'Die Schmiede'. It is a beautiful place with all the comfort you need, very close to everything you want to visit.
There are three bedrooms with four double beds, although you have to pass throug one bedroom to get to the second. The beds are very good, we slept very well, although Berlin is a 'city that never sleeps' ;-)

If you go by car, you'll find a parking building in the street. It costs 7 euros for 24 hours.
Supermarkets are also very nearby.
If you hire a bike, you can park it in the private patio of the house.
There's much more to say about the house, very cosy, quiet and so on...
We certainly can recommend staying there.