Where do you cut under back seat on a Mercury Sable to get fuel pump?

There's no single "cut" location universally applicable to all Mercury Sable models to access the fuel pump. The access method varies significantly depending on the year and model of your Sable. Some models might have access through a panel in the trunk, while others might require dropping the fuel tank.

Before you start cutting anything:

* Consult a repair manual specific to your vehicle's year and model. This is crucial. A repair manual will show you the correct procedure, including diagrams of where the fuel pump is located and the best way to access it. You can often find these manuals online (for purchase) or at auto parts stores.

* Disconnect the negative battery terminal. This is a critical safety precaution to prevent sparks near flammable fuel.

Cutting into your car's body is a last resort and should only be attempted if absolutely necessary and only after you've exhausted all other options detailed in your repair manual. Improper cutting could compromise the structural integrity of your vehicle.

If you can provide the year of your Mercury Sable, I might be able to provide more specific information, but I strongly advise against attempting this repair without a proper repair manual. It's a complex job with safety considerations that should only be attempted by someone with experience or through professional assistance.