Frankfurt to Wolfsburg

They force you to buy additional insurance, otherwise they won't allow you to cross the border. The crossing fee is only 25 EUR, but the insurance costs 66 EUR plus tax, which altogether cost an extra 120 EUR. I booked a C-class but got an X1 instead, which is clearly not the same class in China. Maybe in Germany, X1 has the same price as C-class. I've had a good impression of Hertz before, but this experience was very disappointing. The staff refused to mediate over the phone with the booking agency. It was really frustrating. If I weren't in a hurry, I would've canceled the rental. Do not choose this company.

Satisfactory

I reserved a Mercedes E-Class, but when I arrived in Frankfurt, they gave me a Jeep Wrangler! After refusing it, they replaced it with an XC90. At the time, I thought it was an XC60 and didn't pay much attention. Only when I got the car did I realize, and ended up spending over 200 euros in three days! Hertz in Europe is honestly mediocre. A few days ago in Switzerland, I used Europcar, and it was much better.

There were very few people, almost no queues. There are four counters where you can pick up the car. A young lady was very nice. However, a middle-aged woman was unfriendly to newcomers. One major dissatisfaction was that I booked a Volvo and asked if I could get one if I wait until the reserved time. They said it's impossible to get a Volvo.

I reserved a BMW 3 Series but was given a BMW 5 Series Touring. It's a diesel hybrid, comes with navigation, and can display the speed limit on the dashboard with the vehicle's LIM speed limit function, making it very convenient to avoid speeding. The upgrade was great...