Important! Please observe without fail the following information on correct battery replacement! - ISTA Document RA_61_20_Notes_on_battery_replacement For further information, see: - Master document, battery ISTA_Document_SI_61_07_02_(875) To ensure correct electrical system functions, it is essential to install the original battery stored in the vehicle order (battery size and battery type)! On vehicles with IBS (Intelligent Battery Sensor) the battery must be registered via the diagnosis system (ISTA) and thereby logged in to the vehicle electrical system. Standard batteries can always be replaced with AGM batteries matching the same specification. In the case of this procedure, you must, in addition to registering the vehicle via ISTA/P, carry out a vehicle coding as follows: Read out battery size and registration in the vehicle electrical system: ISTA->Service functions->Body->Power supply->Register_battery_replacement-> Test plan