Are the match and tinder cases marked to seperate them? Its minor, but the devil is in the details.

I'd lose the mason twine. It's ok stuff- heck, I used it for my watch lanyard. But for a car kit, paracord for all of it. Mason twine snaps at something like 15, 20 pounds.

Tow strap? Even if she can't get someone else out, someone might get her out.

Ditto the good jumper cables. They are not the place to cheap on. You can actually buy units that plug into the lighter socket so you can attempt to jump yourself. They aren't worth a thing below 0, they have fairly low amps, but it might be worthwhile.

Someone mentioned an axe and a saw. Saw, yes, axe, for someone who's not skilled with it, no. DIY amputation attempts aren't funny at the best of times.

Shovel? A trowel will do, an entrenching tool is better, especially the Russian one. But you can't beat a real shove with a cut down handle.

Where is the lifehammer?

Delorme map book(s) for your area. Not the best topo maps, but they show pretty much everything important, and useful even in normal circumstances.

How much water? Can she lift it? What kind of packaging? What about winter- I know Tennesse can get unpleasent. Do you have a pot or cup, or is she just going to chug?

Oil and other fluids, does she know where they go?

Tire pressure gauge. I've seen (and had) several car problems that could have been avoided with regular use of one. How often is the spare checked for pressure? Is it a real tire, or a donut?

Break down signals? Did I miss them? If you can't start a fire with a highway flare you are either in space or underwater, so even if you have triangles, toss in a few flares.

An easy to understand survival manual.

A roll of quarters. Phone booths, vending machines, most toll booths, air fill stations, they all like quarters.

Spare wiper blades with replacement instructions. Replace them for her once a year as a set- you show with one, she shows you with the other.

Zip ties and a small spool of brass wire- it's not as good as stainless, but not as hard to work.

Somethign to put under the wheels for traction, like a couple of carpet remnants.

A real tire iron, not the little mini ones that come with the car.