recently, the check engine light is on and off. is not time for service yet. what could it be.
Mercedes-Benz Q&AAsk Your Question
2007 Mercedes-Benz C230 Question: check engine
Answer #1ZeeTech January 10, 2011, 18:51Master
There is a fault registered in the ECM. Your car needs to get a computer diagnostic to see what caused the problem, than it has to be repaired accordingly. After the repair the ECM has to be reset.
Answer #2Visitor, February 11, 2011, 14:43
I have had this problem for 3 years. They told me it was my o2 sensors, I replaced them, light still on, I replaced my cat converter, light still on, I replaced my smog pump, light still on, I replaced my diverter valve, light still on, I replaced my muffler, light still on. Then they finally say its my computer $1600 only to be replaced at the dealership!
ReplyZeeTech, February 11, 2011, 14:50Master
I assume you also have a 2007 C230.
Your computer should be backed by an 8 years / 80,000 miles federal emission warranty.
Check the warranty info in your booklet. They should replace it for free.