How often should I clean and re-oil my K&N air filter?

K&N recommends cleaning and re-oiling your filter every 50,000 miles under normal driving conditions. If you drive in dusty or off-road conditions, you may need to clean and re-oil it more frequently.

Do I need to buy special cleaner and oil for this filter?

Yes, you'll need to use K&N's filter cleaner and oil to properly maintain the filter. Regular solvents and oils can damage the cotton media and reduce its effectiveness. The K&N cleaner and oil are designed to work together to clean and re-oil the filter without damaging it.

Is this filter CARB-legal in California?

K&N does not specify whether this filter has a CARB EO number. Check the K&N website or contact them directly to confirm whether this filter is legal for street use in California.

K&N E-9257 Air Filter for Mercedes | High-Flow

Name: K&N 99+ Mercedes Smart Replacement Air Filter
Brand: K&N
SKU: k-n-engineering-k-n-99-mercedes-smart-replacement-air-filter-t14-284473
Price: 54.00 USD
Availability: BackOrder

K&N 99+ Mercedes Smart Replacement Air Filter

$54.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Drop-in replacement air filter improves airflow and is reusable. Save money and boost performance.

Key Features

Washable — save money on replacement filters
Reusable — environmentally friendly
Oiled cotton media — traps dirt without restricting airflow
Drop-in replacement — installs in the factory air box
Million Mile Limited Warranty — K&N stands behind their product

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's No-Hassle Lifetime Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!