What is allowed on autobahns?

You answered correctly. On German autobahns, stopping on the hard shoulder is only permitted in emergencies, such as a breakdown. It is not allowed to drive next to another vehicle in the same lane, as each vehicle must keep to its own lane. Also, you may only leave the autobahn at designated exits—not via farm tracks or other unauthorized routes. Remember, using the hard shoulder for normal stops or as a shortcut is not allowed; it is strictly for emergencies to ensure safety.