操作说明
2009 年款 大众 Jetta 的空调滤芯用于过滤从暖风或空调系统吹入 Jetta 车厢的空气。 空调滤芯应多久更换一次？ 定期更换空调滤芯：至少每年一次，或每 20,000 英里更换一次。 如果在尘土较多的路况下驾驶，或经常遇到频繁启停的交通状况，或者对花粉、道路尘土和污染敏感，应更频繁地更换空调滤芯。 更换空调滤芯（也称为尘滤器、HVAC滤芯、花粉滤芯、空调滤芯和HEPA滤芯）将改善您的Jetta的空气质量，减轻暖风和空调系统的负担，并可提高燃油经济性。 这类滤芯价格较低，空调滤芯通常售价为 10—30 美元（原作者提示：可以多买几个，滤芯不会过期，需要时就能迅速将旧滤芯换成新的）。 然而，如果你支付费用让专业人士为你更换空调滤芯，费用可能高达 $50 - $100
并非所有大众 车型都配备空调滤芯，对于部分车型，是否配备空调滤芯取决于您所选择的车型级别（GLI）。
新款车型比老款车型更可能配备空调滤芯。 如果你的Jetta在打开暖气或空调时有异味，或者感觉风扇的风力不如以前强劲，更换空调滤芯是一个快速且便宜的解决方法！ 空调滤芯 vs. 发动机空气滤清器？ 在 Jetta 车型中，空调滤芯是指过滤车内空气（即您和乘客所坐的位置）的滤芯；而发动机空气滤清器则是过滤进入发动机的空气。
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The cabin air filter in your 2009 Volkswagen Jetta filters the air that is blown from your heater or air conditioner into the cabin of your Jetta. How often to change the cabin air filter? Change your cabin air filter frequently: at least once a year or every 20,000 miles. If you drive in dusty conditions, lots of stop and go traffic or have sensitivities to pollen, road dust and pollution, change your cabin air filter more often. Replacing the cabin air filter (also known as the dust filter, hvac filter, pollen filter, air conditioner filter and hepa filter) will improve the air quality of your Jetta, will put less strain on your heating and air conditioning system and can increase your gas mileage. These filters are fairly inexpensive, the cost of a cabin air filter is usually $10 - $30 (tip: buy several - they don't expire and you will be able to quickly swap the old one out for a fresh one). However, if you pay to have the cabin air filter changed for you, that can easily cost $50 - $100.
Not all Volkswagens have a cabin air filter and for some models, the inclusion of a cabin air filter depends on what trim level you have (GLI). Newer cars are more likely to have a cabin air filter than older models. If your Jetta 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! Cabin air filter vs. air filter? The cabin air filter in a Jetta refers to the filter that filters the air inside your vehicle (where you and your passengers sit); whereas the air filter filters the air that goes into your engine.