The fuel tank cap won't lock? What's going on?

What's the fuel tank capacity?

Why doesn't the fuel tank have a lock?

I got a GS7 two-wheel-drive Luxury Smart Edition. Can anyone tell me if there's no manual adjustment for the headlight height? Also, the fuel tank cap won't open. It used to, but now pressing the button doesn't do anything. What's going on?

Recently, my fuel tank cap often won't open. Sometimes hitting it with my fist works. Any guidance, please? Thanks!

How to deal with a fuel tank cap pull ring that won't open, and I can't find the emergency pull ring in the trunk.

How to open the fuel tank cap on a 2019 Ford Territory?

Where is the fuel tank switch on the 2013 City? Do you just press the fuel tank cap to open it?

I just bought a used 2016 Santana, and I'm trying to figure out how to lock the fuel tank cap. I realized it can be opened no matter what I do.

The fuel tank cap won't lock? What's going on?

After maintenance, the car door suddenly won't lock! The side mirrors won't retract, and there's a clicking sound near the fuel tank.