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The cabin air filter in your 2009 Mercedes-Benz C300 filters the air that is blown from your heater or air conditioner into the cabin of your C300. You need to change it at least once a year or every 20,000 miles. Replacing the cabin air filter (also know as the dust filter, hvac filter, pollen filter, air conditioner filter and hepa filter) will improve the air quality of your C300, will put less strain on your heating and air conditioning system and can increase your gas mileage. These filters are fairly inexpensive, so check out our parts page for great deals on a new one (tip: buy several - they don't expire and you will be able to quickly swap the old one out for a fresh one).
Not all Mercedes-Benzs have a cabin air filter and for some models, the inclusion of a cabin air filter depends on what trim level you have (Sport). Newer cars are more likely to have a cabin air filter than older models. If your C300 has a funky odor when you turn on the heat or air conditioner, or it seems like the fan doesn't work as well as it used to, replacing your cabin air filter is a quick and cheap fix! The video above shows you the cabin air filter location in your C300 and how to change it!
Low coolant levels is all to common - top yours up today2009 Mercedes-Benz C300 Sport 3.0L V6
Got a short fuse? Don't blow a fuse, change it!2009 Mercedes-Benz C300 Sport 3.0L V6
There's no reason to check the washer fluid level without adding some - see how to do it here!2009 Mercedes-Benz C300 Sport 3.0L V6
Learn where your air filter is located and how to determine if it needs to be changed.2009 Mercedes-Benz C300 Sport 3.0L V6
One of the easiest fluids to top off - learn how to open the hood and where the reservoir is on your car2009 Mercedes-Benz C300 Sport 3.0L V6
White light when you back up - yup, they burn out and you can replace them with bright LEDs2009 Mercedes-Benz C300 Sport 3.0L V6