Mercury Mariner Workshop Manuals
If you want to do fixes on your Mercury Mariner then it is always recommended to have access to a Workshop Manual for a reference just in case you want to know how you can strip off a specific part for example the Door and install it again in the correct way.
Searching for Mercury Mariner Manuals.....

Mercury Mariner Workshop Manuals provides special diagnostic wisdom for your vehicle so if something is faulty it helps you understand what the issue is and some ways to make it better. You will be able to evaluate if this can be done by yourself or in the event the job is too big it is possible to book your Mariner in to a nearby mechanic.