EghtesadOnline: to read car reviews in PCO blogs. This way, you will earn enough information about a specific car in detail and choose the best PCO cars for rent to start earning like a pro. As Mercedes Benz is always in the top list of luxury cars, today we decided to review one of Mercedes cars called Mercedes e class. PCO is the abbreviation of Public Carriage Office which offers further transportation methods such as a private hire car. When you hire a PCO car you can become a member of these offices and work as a private driver such as an Uber driver.