How can I reset the onboard computer on my Audi 80?

I have noticed some malfunctioning in the onboard computer of my Audi 80 and would like to reset it to see if that resolves the issue. Can anyone help me with the steps to reset it?

First, turn off your car's ignition and disconnect the negative terminal from the battery for about 15 minutes. Then, reconnect the terminal and start your car to see if the computer has been reset. If the problem persists, you may need to take it to a professional mechanic for further diagnosis.

You can also try accessing the onboard computer's diagnostic mode by pressing and holding the trip reset button while turning on the ignition. This might reset the system and resolve any issues.

If the above methods do not work, you may need to use a diagnostic tool to reset the computer. These tools can be purchased or rented from auto parts stores or you can take your car to a mechanic who has one.