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does mileage reset with new engine
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The Check Engine Light (CEL) on a Mercedes, like in most modern vehicles, is designed to illuminate when the onboard diagnostics system (OBD-II) detects a malfunction or irregularity in the engine or emissions system. While minor issues might cause the light to turn off once the problem is resolved (for example, a loose gas cap), most of the time, the CEL will not reset itself immediately after a fault is corrected. It usually requires either a certain number of driving cycles without the fault recurring for the system to automatically turn off the light or the use of an OBD-II scanner to manually reset the system. If the light came on due to a serious issue, simply correcting the fault will not reset the light; diagnostic equipment will likely be needed to clear the fault codes from the system. It is important to address CEL warnings promptly to avoid potential damage to your vehicle. If the light remains on, it's advisable to have a professional diagnose and rectify the issue.
The duration for a check engine light (CEL) to turn off varies, typically hinging on whether the issue triggering it has been resolved. If the problem is minor and fixed, the CEL may turn off almost immediately or within a few driving cycles—usually, a cycle encompasses starting the engine, driving, and turning the engine off. However, in some vehicles, the light might persist until manually reset, especially if it was activated by a significant fault. To ensure safety and prevent potential damage, it's crucial to diagnose the cause promptly using an onboard diagnostics (OBD) scanner. Ignoring the CEL can escalate minor issues into costly repairs. If you've addressed the underlying issue but the light remains on, a mechanic can help reset it or further diagnose persisting problems.
Putting diesel fuel into a gasoline engine can cause significant issues due to diesel's higher ignition temperature. If this happens, do not start the engine. The first step is to drain the fuel tank completely. You should then replace the fuel filter, as diesel can clog it. If the engine was started with diesel in it, more extensive cleaning of the fuel lines, injectors, and possibly replacing spark plugs may be necessary, since diesel might leave residues that hinder engine performance. It's crucial to use a high-quality gasoline to refill the tank to ensure any remaining diesel is diluted. This mistake can be costly, and in severe cases, professional mechanical intervention might be necessary. Therefore, it's always advisable to double-check the fuel type before filling up your vehicle. Always consider consulting with a professional mechanic or a service center for your specific vehicle model to ensure proper remediation.
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