Initially, I reserved the car pick-up at 4 PM. However, upon arriving early, I called to reschedule, and they adjusted the time since they had available stock. I initially expected a Golf, but I received a Kia SUV without any extra charges, which was satisfying. The only downside is that CARO doesn't have a station at the train station, which makes the pick-up and drop-off location inconvenient. I suggest that the rental location details, including district, street name, and house number, be clearly provided so that GPS can find it.

Overall satisfied, but returning the car was a nightmare! The reason is that when picking up the car in Frankfurt, it was confirmed that the car was to be returned at Frankfurt Airport (common sense would think it's at the terminal's lower level), but upon arrival at Terminals 1 and 2, we couldn't find the CARO company office (other rental company offices were all there). Desperately asked locals for help and found out the CARO return office is in a nearby town. This was not clearly explained by the staff during pick-up!!!!

There was no GLK available, so I was upgraded to an ML350. Although it has already 26,000 km on it, the performance is excellent.