Fitment: The OBD2 engine fault code reader is compatible with Mercedes-Benz W211 and R230 models equipped with SBC systems, allowing for easy repair without replacing the control module. Function: Scans car diagnostic trouble codes in seconds to identify emission-related issues, read and clear codes, view DTC definitions, turn off the check engine light, check I/M readiness status, retrieve freeze frame data, and access vehicle information. High Efficiency: Retrieves generic, manufacturer-specific, and pending codes quickly, displays DTC definitions directly under each code, helps locate problem areas efficiently, and allows clearing or resetting codes after repairs. Easy to Use: Each code is displayed with its definition, saving time and effort by quickly identifying the issue location; ideal for DIY users and beginners. Operation: Plug into the OBDII port, turn on the ignition, wait for two signal indications confirming normal operation, restore the maintenance mode switch when the Busy indicator is lit, and complete data recovery within 10 seconds.