This is why the people doing the diagnosis should have nothing to do with the people providing the service. Always get a second opinion.

Service industries that primarily provide a crutch for the ignorance of their customers are ripe for this kind of exploitation. These include all kinds of repair, law, and medicine. Service industries where the customer knows exactly what he needs are invulnerable to the false diagnosis scam.

And by the way, Mercedes is overpriced garbage. They don't last as long as toyotas or hondas.