Okay

I had reserved a Volvo V40, but upon arrival, I was informed that it was unavailable and was offered a Ford instead. I assumed it would be a Ford Focus of the same grade, but after completing the paperwork and going to the parking lot, I discovered it was a smaller class car. Moreover, there were no staff members at the parking lot, and it was self-service pickup. This is clearly misleading and deceitful. If you don't have the specified model, you shouldn't charge for it. I felt very disappointed. I was carrying large luggage and didn't want to go back to discuss switching cars.

I wasn't very satisfied. I booked a V40, but they told me it wasn't available and replaced it with a Ford Mondeo. They also charged me for the GPS which cost 1000, while the car rental was just 1500. How can I not complain about this?!

Hertz's overall service was terrible. We had to wait in line for more than half an hour at Frankfurt Airport to pick up the car, only to find out that their store's computer system and POS machine were both down. They said they needed to do a pre-authorization over the phone. After showing them three cards, they finally said it was successful. However, we received bank messages showing pre-authorization on all three cards. They provided incorrect parking information, making us search for the car for quite some time, and eventually, we got help from staff from another rental company to find the car on an upper level. When returning the car at the Frankfurt city center location, I requested a receipt and was told to come back the next day. When I went the next day, they said they would check immediately and to come back in 20 minutes. After waiting 20 minutes and returning, the counter staff had already left. A neighboring rental company employee said he received an emergency call and had to leave. We had to go back a third day and were presented with a bill over 600 euros higher than our booking. When we discussed the incorrect charges with the staff, they told us that they billed according to the computer records and advised us to call customer service. We had to fly back to our home country that day, so we could only handle the issue after returning. Overall, this was a terrible car rental experience.

We indeed got a Mercedes ML250. We chose the rental and return location at Frankfurt Central Station. The rental office is inside the train station. We met a kind German who accompanied us all the way to the office. The car is in the underground parking garage P3 of the train station, and the pick-up and drop-off are at the same place. We were worried about additional fees, but today we received the charge notification, which matches the order amount, so we are relieved. It's worth noting that the rental office doesn't inspect the car with you in person, so we were worried something might come up after returning home. Fortunately, all was well.