Type A: For BOSCH high voltage transformer 8 903 428 016 ,used in Mercedes S Class ... with 93C66 EEPROM inside). Type B: For BOSCH high voltage transformer 9 948 411 098, 9 948 411 025, 9 948 ... two types of them: Type A: For BOSCH high voltage transformer 8 903 428 016 ,used in Mercedes S Class W220 ... with 93C66 EEPROM inside). Type B: For BOSCH high voltage transformer 9 948 411 098, 9 948 411 025, 9 948 ...