For the operating instructions of the Pioneer Elite VSX-LX305 AV receiver in German, you can take the following steps:

1. manufacturer website: Visit the official website of Pioneer and search for the product VSX-LX305. There are often download links for user manuals in various languages, including German.

2. support page: Go to the manufacturer's support or download page where you can download specific documents and manuals for the device.

3. dealer websites: Some retailers, such as digitec, also offer instruction manuals and other documents on their product pages. Check the product page of the retailer where you purchased the device.

4. customer service: If you cannot find the user manual online, contact Pioneer's customer service directly and ask for a German version of the manual.