Fitment: The OBD2 engine fault code reader is a replacement for Mercedes-Benz W211 R230 with SBC systems, allowing repair without replacing the control module. Function: Scans car diagnostic trouble codes quickly to identify emission-related issues, reads and clears codes, displays DTC definitions, turns off the check engine light, checks I/M readiness status, retrieves freeze frame data and vehicle information. High Efficiency: Retrieves generic, manufacturer-specific, and pending codes within seconds, displays DTC definitions alongside codes to quickly locate problem areas, and allows clearing or resetting codes after repairs. Easy to Use: Each code is displayed with its definition, saving time and effort in identifying issues, ideal for DIY users and beginners. DTC definitions appear directly below the corresponding code. Operation: Plug into the OBDII port, turn on the ignition switch, wait for two beeps indicating normal operation, restore the maintenance mode switch when the Busy indicator is active, and allow 10 seconds for data recovery completion.