Mercedes-Benz c260 throttle signal is not credible. What's going on here?

The signal of Mercedes-Benz c260 accelerator is unreliable, which is caused by carbon deposition on the accelerator, abnormal line voltage of the accelerator, poor line contact, data voltage or line-to-line fault of the accelerator pedal, and failure of the engine computer itself. Troubleshooting should follow the principle of machinery first, then circuit, and accessories should not be replaced blindly.