Please be cautious ⚠️ when picking up the car, make sure to carefully review the contract. The counter staff will quickly show you the contract on the computer screen without providing a paper copy, claiming it has been sent to your email. I trusted them, but when I reached my first stop in Ladenburg, I checked my email and found no rental contract. I contacted Zuzuche for assistance, and they helped locate the contract with the rental company. I discovered that the rental company had secretly added over 1,000 euros of additional charges (despite repeatedly clarifying at the counter that I only wanted the items booked on the Zuzuche platform, plus cross-border travel and an additional driver). I decided to drive over 80 kilometers back to the Budget counter at Frankfurt Airport to argue with them and demand the removal of the extra charges. With Zuzuche's coordination and assistance, we finally managed to cancel the additional items (spent nearly two hours and incurred 30 euros in parking fees, as parking at Frankfurt Airport costs 15 euros per hour—really expensive!).