I booked a Mercedes and got a Kia instead. How could I be satisfied?

The process was smooth, but the staff initially recommended some better cars without mentioning the additional cost. The sales approach could be improved.

Smooth car rental with a brand new vehicle. The only downside is an approximate 85 euros fuel deposit. They promised to refund it when the car is returned with a full tank, but you need to email them with the fuel receipt as a reminder.

A very good car rental company. Picked up the car at Munich Airport according to the directions in the comments. The service was provided by a sweet girl dressed in traditional Bavarian attire. You need to go to the parking lot and find the car based on the parking space number. The car was very clean inside and out. The only issue was not hearing clearly about a small parking ticket needed to leave the lot, resulting in an awkward delay at the exit.

It's a bit of a walk from the train station, and you have to cross the street, but the front desk provided clear directions. You pick up the car yourself using the parking ticket given by the front desk at the exit. There aren't many gas stations nearby, so I used GPS to find one near another store to refuel. For returning the car, drive to the ground floor of the parking lot, and hand over the car, keys, and documents. There's no paperwork or handover documents needed.