If you need to perform adjustments on your Lem Four X then it will always be a good plan to have access to a Workshop Manual to keep just for reference if you need to know the way to take out a specific component for example the Exhaust and match it again correctly.
Lem Four X Workshop Manuals provide you with specific diagnostic information for the car or truck so if something is wrong it will help you identify what the problem is and ways to repair it. You can then assess if you can do this yourself or in the event the job is too big you can still book your Four X into a decent mechanic.
Lem Four X manual