I would bring tea towels, a little something to eat for the first time (it takes a while to get to the store), a few tea lights for a romantic mood in the evening,–), a power adapter for the larger / round German mains plugs (notebook e.g., the narrow fit). Tip: there is such an adapter on the vacuum cleaner in the guest bedroom! toilet paper is in the closet behind the guest bedroom. almost all german tv stations can be received.