How to Reset Mercedes Computer After Battery Change Turn Off Ignition: Ensure the ignition is off before starting the reset process. Disconnect and Reconnect the Battery: Disconnect the new battery for a few minutes and reconnect it to reset the vehicle’s systems. Reset Radio/Infotainment System: If needed, enter the radio code or perform a manual reset for your infotainment system. https://pcinformation.org/how-do-i-reset-mercedes-computer-battery-change/