1. Preparation:
* Gather your tools: You'll need a trim removal tool (plastic pry tool is ideal to avoid scratching), a screwdriver (likely Phillips head), possibly a Torx screwdriver (check your model year's specific instructions), and potentially a socket wrench (again, check your model year).
* Consult your owner's manual: This is crucial. The manual will provide specific diagrams and instructions for your vehicle's year and trim level, which are far more reliable than general online advice.
2. Removing the Door Panel:
* Window Control: Fully roll down the window.
* Door Handle: There's usually a small cover on the door handle. Carefully pry it off with your trim tool. You may find a screw underneath that needs to be removed.
* Armrest: The armrest often needs to be removed. This usually involves prying gently around its edges to release clips. There may also be screws hidden underneath.
* Door Panel Clips: Carefully work your trim tool around the edges of the door panel. There are several plastic clips holding the panel in place. Start at the bottom and work your way around, gently prying the panel away from the door. Be very careful not to break any of the clips. The clips are usually located along the edges and may be more concentrated at certain points.
* Electrical Connectors: Once most of the panel is loose, carefully disconnect the electrical connectors for the power window switch, door lock, and possibly other components. These connectors usually have a release tab or lever; gently press or push it to disconnect.
* Speaker (if applicable): If the speaker is mounted to the door panel, you might need to disconnect it as well.
3. Replacing the Mirror:
* Mirror Removal: Once the door panel is off, you should have access to the mirror mechanism. The process for removing the mirror itself depends on the type of mirror (power-folding, heated, etc.). You may need to remove screws or unplug electrical connectors. Refer to a repair manual for specifics on your mirror type.
* Mirror Installation: Carefully install the new mirror following the reverse order of removal. Make sure all connectors are securely attached.
4. Reassembly:
* Reattach Electrical Connectors: Ensure all the electrical connectors are securely plugged back in.
* Reinstall Door Panel: Carefully align the door panel and push it back onto the door, making sure all the clips snap back into place.
* Reinstall Armrest and Door Handle Cover: Put these back in place, securing them with the screws you removed earlier.
* Check Functionality: Test the power window, door lock, and mirror to make sure everything works correctly.
Important Considerations:
* Patience is key: Take your time and be gentle to avoid breaking any plastic clips or damaging the door panel.
* Take pictures: Before you start, take pictures of how everything is connected. This will help you during reassembly.
* Repair Manual: A repair manual specific to your year and model of Ford Fusion is invaluable. It will show you exactly where the clips and screws are located and how to remove and reinstall the components safely. This is much better than relying on generalized online advice.
If you're not comfortable performing this repair yourself, it's best to take your car to a qualified mechanic. Damaging the door panel or the door itself can be costly to repair.