Do not Uber in a Mercedes!
I saw a guy who is doing UberBlack in a Mercedes S-Class. This is a big mistake! For one…anything which goes wrong with that car is hugely expensive and nothing can be done by a regular mechanic.
Stick with the usual cars that taxi and limo services use…which are Toyota Camry Hybrid/4 cylinder for X and MKT/Suburban for Black. Reinventing the wheel and using an exotic car is a grand mistake!