MST-90+ Car Battery Voltage Regulator Charger for ECU Coding Power Stabilizer
Then need connect to the battery (or press the FORCF START button). LCD display: BMW BENZ AUDI battery bad no battery; Power OFF! LCD display: battery bad no battery; MST-90+. 2: Verify that the connection between the positive and negative poles is correct when connecting the clip cable to the battery or vehicle.