A nice little hotel for an adequate price. Own Parking (paid separately). They didn't take breakfast, I won't say for them, but tea in the evening was expensive. But in the hot months, you can pour yourself a free lemonade at the reception. Various attractions are within walking distance. We managed to visit only the Technological Museum, I highly recommend it (by the way, there are Russian-speaking staff in several halls, you can have a nice conversation). The Hockenheimring Race Track is a 20-30-minute drive away.
Look for numbers not only in aggregators, but also on the official website of the network - although it looks a little strange and even suspicious, but the price turned out to be much lower.