At the London Heathrow Airport branch, I was received by a lady who informed me that I had reserved a hybrid car (which is more expensive). I told her that was not the case. After typing on her computer, she realized she had made a mistake due to a name match. She then asked how many kilometers I planned to drive, and I responded that I thought the rental was unlimited mileage. She mentioned that based on my mileage, they could offer a discount on fuel, but I insisted on returning the car with a full tank. She then printed the documents for me to sign. I requested to verify each item and noted that there was an additional charge for super insurance, which I had already purchased through QEEQ, and it was clearly stated on the reservation not to upsell insurance. I pointed this out to her, and after some more typing, she reprinted the documents and retrieved the original ones. After picking up the car, I noticed that the inspection form indicated the car ran on diesel, but it was an Audi A3. Doubtful, I asked a security guard who politely suggested I smell the fuel tank, which confirmed gasoline. He double-checked with a colleague and confirmed that the document was incorrect. This was my first time renting from HERTZ and I hope this was just a one-time mistake.