If you are the owner of Mercedes, you should have Mercedes scanner to auto diagnosis of your vehicle. Mercedes SD connect C4 and Mercedes Benz scanner is a good plug and play Mercedes diagnostic tool, just connect and diagnose your vehicle instantly.
The main purpose of using diagnostic tool is to cut down on the repair time of the vehicle. Hooking up the tool allows it to locate, diagnose and analyze the vehicle's problem in just a matter of minutes. Once the tool is plugged into the socket of the diagnostic resource center, turning the key on or cranking the engine allows the user to diagnose, analyze and fix the vehicle's problem.