2000 Mercedes-Benz S430 Q&A
2000 Mercedes-Benz S430 Question: My "check engine" light just came on but the diagnostics says No Malfunction?
What diagnostics? Find someone who has a diagnostic tool that can read data on the enhanced side of the PCM not just a generic OB2 code reader. - backyard tech
Scan for trouble codes using a professional grade scan tool have trouble codes stored, pending codes and "freeze frame" information printed so the trouble codes can be properly diagnosed. - patrick mannion