How do you reset service indicator on Mercedes C220 CDI?

To reset the service indicator on a Mercedes C220 CDI, first, turn on the ignition without starting the engine. Next, press the gas pedal fully three times within five seconds. After that, turn off the ignition, and when you turn it back on, the service indicator should be reset. If this method does not work, consulting the owner's manual for specific instructions related to your model year may be necessary.