I stopped to buy gas yesterday, and at the pump in front of me was a young lady, I'd say 17 years old. I noticed she kept looking at an address book, walking away from her car and back again, but not getting in.
I asked her if she'd locked her keys in.
"No" she said, "I was driving and I heard this big POP in my engine, and I smelled something, and a light went on in my car"
She showed me some paper she had and said "This light. Do you know what that is?"
Oh yeah, that's your engine light. Good thing you stopped, if you kept driving you could have big trouble....Have you looked under your hood?
"No.....uh....I don't know how to open it"
I'm glad on had sunglasses on, because for a split second I thought, "oh brother" then just as quickly I remember what it was like to not know about some simple thing, and afraid someone would get all condecending. Plus, I had to give her credit for admitting that, and she really seemed like a good kid.
For the next few minutes, I realized how much stuff we pick up along the way...
How to open the hood of a car
How to check the oil and coolant level
noticing a broken belt or hose.
knowing if something goes wrong with your car you're not going to get help at a self serve gas station with no service area.
I didn't see anything obviously wrong, but I don't know that much about cars.
I told her to start her engine and move out of the gas lane and pull under the tree a few yards away.
I asked her if she had AAA and she said "I don't know....maybe...." She had mentioned her mom before, so I said the best thing to do was call her, tell her where you are and she'll get help or come over. Then I told her what to do if her car ever started overheating while she was driving and continued on my way. She was not in an unsafe area, and it was broad daylight, so I knew she'd be ok.
What if this had happened at night to her, in a bad part of town?
I had to laugh because once or twice during this she said "you know so much about cars"

...and then when I was leaving she said "Thank you, you're so knowledgeable"

Like I said, she was a good kid.
Maybe part of getting our drivers license should be that you're able to demonstrate you know how to check your oil, check you tire pressure (never mind changing a tire) and at least know how to open the hood of the car.
What stuff do you know how to do that you take for granted?