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A check engine light can indicate a broad spectrum of problems with your 2009 Mercedes-Benz C300. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. The video above shows how to locate the on board diagnostics (OBD) plug on your 2009 C300, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your C300.
Intermittent Check Engine Light: If the check engine light on your 2009 C300 is intermittent, try to take note of the conditions when this happens. For example, does it happen when you accelerating, driving on the highway or does it appear at low speeds? This will help your mechanic evaluate the issue. Steady Check Engine Light: If your check engine light is on every time you operate your C300, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. Flashing Check Engine Light: If your check engine light is flashing, stop driving your C300 and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. If you are unsure about what your diagnostic trouble codes mean; have your C300 diagnosed by a professional automotive technician.
If your battery has green or white cruddy deposits, it is probably not getting enough juice from and will likely wear out sooner2009 Mercedes-Benz C300 Sport 3.0L V6
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2009 Mercedes-Benz C300 Sport 3.0L V6
Low coolant levels is all to common - top yours up today2009 Mercedes-Benz C300 Sport 3.0L V6
Is the clock in your car ahead or behind? Learn how to set it here!2009 Mercedes-Benz C300 Sport 3.0L V6
Flushing the coolant in your car is not that hard and will extend the life of your engine tremendously - learn how here!2009 Mercedes-Benz C300 Sport 3.0L V6
Coolant hoses wear out over time and need to be replaced - check 'em early and often2009 Mercedes-Benz C300 Sport 3.0L V6