Transformer for Mercedes S Class W220 instrument cluster illumination repair Information Mercedes Benz S Class W220 owner have many problems with this car instrument cluster. The problems include no lighting, partial lighting and /or flickering or intermittent lighting, or can’t see the miles badly. Mainly to repair this dashboard you need replace defective lighting transformer to a new one We have two types of them: Type A: For BOSCH high voltage transformer 8 903 428 016 ,used in Mercedes S Class W220 care year 1998-2000 (dashboards with 93C66 EEPROM inside). Type B: For BOSCH high voltage transformer 9 948 411 098, 9 948 411 025, 9 948 411 09 027. For Mercedes S Class W220 cars year 2000-2005 (dashboards with 24c04 EEPROM inside).