The automàtic Update for the new Engine 5700 will be included in the DAT that will be released on the 20th of January. No, patch 5 will not be updated basically because will not be released until end of February if there is not delays,
What my question was, once P5 should become available, will the Auto Updater install this as well automatically or will I need to download it separately?
The patch is a separate download from the engine.
And Autoupdate will not apply the patch for you automatically. We require admins to download the patch themselves, then add it to their ePO repository if they want Autoupdate to saturate the patch into their environment.