How do I reset a Mercedes computer after a battery change you insert the battery, and it’s time to restart the computer. Begin by connecting the OBD-II scanner to the OBD II port on the driver’s side. You can then log in and reinstall the necessary software. First, reset the board, remove the battery, and drain any remaining voltage. This process will take about 15 minutes. Read more articles about Mercedes computer issues on the PC Information website.
Changing Your Mercedes Battery
Prepare the Vehicle
First, ensure the device is turned off and all parts properly loaded. Next, open the hood of your Mercedes and locate the battery. You should notice a solid white area accompanied by negative space. If you encounter any issues or observe that the battery is not securely fastened, you must address it immediately.
Remove the Old Battery
Use the key or power button to open the compartment. Disconnect the wall cable and remove the battery. Follow these steps: open the cable, remove the battery, and disconnect the device. Make sure the battery is fully charged. If everything looks good, remove the old battery and remove it from the car.
Install the New Battery
Once you have the new battery, start the reset process. Install the new hardware in place of the old one. Tighten all the extra buttons, nuts, and bolts. Ensure all connections are secure.
General Steps
Remove the Battery
First, disconnect the negative terminal of the battery. This helps avoid electrical problems during the resetting process. Use a wrench or hacksaw to loosen the terminal block and carefully remove it.
Wait and Remove the Remaining Charge from the Capacitor
After disconnecting the battery, let the car sit for about 15 minutes. This waiting period ensures that the remaining charge in the capacitor is completely discharged. This also helps prevent electrical issues during the reset. Removing the charge from the EEPROM might also be necessary to clear stored data.
Reconnect the Battery
After waiting, reconnect the negative terminal of the battery. Use the wrench or socket wrench to tighten the terminal clamp. Ensure the connection is firm but not overly tight. If needed, you may briefly touch positive and negative battery cables together to help with the reset but do so carefully.
Verify Car Performance
Start the engine and let it run for a few minutes. This allows the computer system to power up and communicate with various components of the vehicle. During this time, you may see warning lights or error messages, but they should disappear once the reset is complete. This step ensures components like the starter motor, temperature sensor, and pressure switch are properly calibrated.
Check the OBD-II System Response
Connect the OBD-II scanner to the vehicle’s diagnostic port, typically located on the dashboard on the driver’s side. Follow the scanner’s instructions to access the vehicle’s system. Select the option to reset the error code and restore the system response. This action will clear all previously stored fault codes. If the LED display shows any issues, follow the instructions to resolve them. The duration of this process can vary depending on the vehicle type.
Conclusion
Navigate to the main menu and select “Settings.” Here, you’ll find various options. After disconnecting the battery, let the car sit for about 15 minutes. When you choose “Restore Your Computer,” a message will appear. If you face any Mercedes problems after battery replacement, refer to Mercedes-Benz battery replacement instructions for additional guidance.