The 2012 Ford Super Duty Owners Manual - Diesel 250 350 450 550 XL XLT Lariat Complete Set would be a comprehensive guide covering all aspects of owning and operating a 2012 Ford Super Duty truck, including various trim levels such as XL, XLT, and Lariat. Here"s what you might expect to find within such a manual:

Introduction: An overview of the vehicle, including its specifications, features, and model variations (250, 350, 450, 550). This section may also provide information on the different trim levels available.

Getting Started: Instructions on how to set up and familiarize yourself with your new vehicle, including adjusting seats, mirrors, and steering wheel, as well as setting up the audio system and other basic features.

Maintenance Schedule: A detailed maintenance schedule outlining recommended service intervals for various components of the vehicle, such as oil changes, tire rotations, and filter replacements.