This is a brand new 1998-2005 Mercedes A-Transformer with 4 pins that can be used to replace Bosch part number 8 903 428 016 used in Mercedes S Class 1998-2005 clusters with 93C66 EEPROM
This transformer is used in 1998-2000 Mercedes S Class instrument clusters with 93C66 EEPROM chip.
Additionally, we carry the B-Transformers and the original 7-pin Mercedes Bosch VOGT Transformers. And please be aware that you may also need to replace the BUZ102S or BUZ102SL transistors inside the cluster to restore the lighting.
We do not offer any additional technical support for this DIY part.
If you are not confident in your abilities to install this, please contact us about sending your unit in for repair.