Is your Mercedes-Benz Check Engine Light on? Learn how to fix the cause of the check engine light to illuminate by reading and clearing faulty codes using an OBD-II Scanner.
To read Mercedes-Benz fault codes, you will need a good diagnostic scanner to read and clear fault codes from all the control units. The YOUCANIC full system scanner can read and clear codes on all 2000 and newer Mercedes-Benz cars and carry out bidirectional testing of components.
- Park the Mercedes-Benz in a safe location and turn off the ignition.
- Locate the OBD-II port under the dashboard and plug in your scanner.
- Turn on the ignition, but do not start the engine. If you intend to spend more than 10 minutes diagnosing your Mercedes-Benz, connect a battery charger or restart the engine and allow the battery to recharge.
- Allow the scanner to power on. Go to Mercedes > Select Model.
- Go to Auto Scan. Allow the scanner to go through all the systems and determine fault codes stored on each one. This will take a few minutes. Enter any of the modules by selecting it—view fault codes.
- Go back once and select Clear Codes to erase any code in stored status. You can not erase the present status codes without fixing the underlying problem.
Generic OBD-II scanners cannot read many modules besides the Engine Control Unit (ECU) and maybe Airbag or Transmission. You need a Mercedes-Benz scanner that can read all control modules. Mercedes-Benz cars typically have 30+ modules installed.
If you want to troubleshoot a pre-2000 Mercedes-Benz, you will need a scanner that has supported those models for years and, most importantly, comes with the Mercedes 38-pin connector. If your vehicle does not require a 38-pin connector, the YOUCANIC Full System Scanner is the way to go.
We hope you find the Read & Clear Mercedes-Benz Fault Codes DTC guide helpful. Check these troubleshooting and repair guides for more help on your Mercedes-Benz.
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