I bought full insurance on Zuzuche, but when picking up the car from the rental company, they insisted I purchase another full insurance for 160 Euros. After negotiating, they said if I don't buy it, they would hold 2000 Euros on my credit card. I can understand pre-authorization and deposits when renting cars domestically, but it's normally unnecessary for renting abroad. They blatantly bullied Chinese customers. A German couple next to me only needed to verify their order information and sign their names to get their keys and collect their car, which was conveniently parked right at the entrance. On that day, it was raining in Iceland, and after we bought the insurance, they simply handed us the keys and told us to find our car in the parking lot ourselves. Normally, I could understand this procedure at airports, but comparing the two experiences was disheartening. Aren't German and Chinese customers both customers? This isn't just about the insurance scam; it's about the extra effort paid because of bad weather and still receiving subpar service.