Description
The K&N Filters Replacement Air Filter for Mercedes Smart 1999 (KNNE-9257) is designed to maintain consistent airflow while protecting your engine from harmful contaminants. Ideal for drivers looking for a reliable and reusable filter, this unit fits directly into the factory airbox 1999 and newer Mercedes Smart models without modifications. With high-flow cotton gauze construction, this filter supports better engine breathing and efficient performance. Washable and reusable, it offers a cost-effective solution for long-term vehicle maintenance.
Features and Specifications:
- Vehicle Fitment: Mercedes Smart 1999
- Height: 5.5 in (140 mm)
- Inside Diameter: 2 in (51 mm)
- Outside Diameter: 3.5 in (89 mm)
- Weight: 0.6 lb (0.3 kg)
- Low maintenance: Under normal highway conditions, it requires cleaning only every 75,000 miles (about once every 5 years based on 15,000 miles/year).
- Durable construction: Built with premium materials and advanced manufacturing for long-lasting performance.
- Eco-friendly: Helps reduce landfill waste by replacing hundreds of disposable filters over time.
- Performance-enhancing: Engineered filter media improves horsepower, acceleration, and overall engine performance.
- Easy installation: Pre-oiled and ready to install—fits directly into the factory air box with no modifications.
- Advanced filtration: Four layers of cotton gauze treated with a tacky agent effectively trap harmful contaminants.
- Lifetime warranty: Includes a limited lifetime warranty for stock replacement applications (terms and conditions apply).





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