I have noticed that MC trailer are not treating patients.
Other vehicles, like fire eng, or officer will show up and start treating,
The trailers do nothing at all. It shows they are attached to patients but nothing mores.
Someone will jump in for sure here, but there has always been this problem with those units... Something about them not being able to transport and even though they have the patients, you have to send transports units... Probably not explaining it correctly, but that is it in a nutshell