* Oxygen sensor: The oxygen sensor is responsible for measuring the amount of oxygen in the exhaust gas. If the oxygen sensor is faulty, it can cause the engine light to stay on.
* Catalytic converter: The catalytic converter is responsible for cleaning the exhaust gas. If the catalytic converter is faulty, it can cause the engine light to stay on.
* Exhaust gas recirculation (EGR) valve: The EGR valve is responsible for recirculating a small amount of exhaust gas back into the engine. If the EGR valve is faulty, it can cause the engine light to stay on.
* Mass air flow (MAF) sensor: The MAF sensor is responsible for measuring the amount of air flowing into the engine. If the MAF sensor is faulty, it can cause the engine light to stay on.
* Engine control module (ECM): The ECM is the brain of the engine. If the ECM is faulty, it can cause the engine light to stay on.
If the engine light on your SLK 350 stays on, it is important to have it diagnosed by a qualified mechanic. They will be able to determine the cause of the problem and recommend the best course of action.
