So this is a bit embarrassing, but it was educational. I recently drove around the US, 7+k miles. While I was in South Carolina, I somehow managed to fill my Mk4 with gasoline. How you might ask? I'm still trying to figure that out. The deal was I pulled off I95 in to some nowhere station, because the price was cheap. Pulled into the BP station, and proceeded to fill up the car. I even remember checking that the cost of the fuel was the same as posted for D2. Pushed the button for DO, I thought.
Note: Earlier in this trip, I discovered that in TX??, not all Diesel pumps are green, as out west. SO I was aware of this issue. Yellow is the color of choice
Back on the freeway, and about 5 minutes later, I'm dead in the water, coast off the freeway, luckily (I thought) onto the off ramp.
Long story short, I discovered the following: 1, my car doesn't have an electric fuel pump. 2, you can access the fuel tank easily under the back seat. 3, an empty water bottle will just fit inside to scoop out all the gasoline.
Moral of the story, be careful when you are filling up, especially when not in your normal state, or familiar station. I think that due to I was at a BP station, and there colors are green and yellow, and the fact that they only had one island, with multiple pumps at one stand, I somehow made a mistake. Cost me several hours of time, and a $200 to be back on the road, but otherwise no other issues.
Good luck and be safe out there.
PS, Just after stopping, hood up, bags on the ground, a police officer, came by, but wouldn't / didn't stop. made my day!