Performance Air Filter for Mercedes A-Class, B-Class, CLA, GLA & GLB (2018-2026)

High-Flow BMC Replacement Air Filter for Mercedes Benz A-Class, CLA-Class, GLA-Class, GLB-Class (W177 / C118 / H247 / X247)

What it Does: The BMC performance air filter replaces the restrictive factory paper element on the Mercedes Benz A-Class, CLA-Class, GLA-Class, and GLB-Class to decrease intake vacuum restriction, optimize turbo spool, and sharpen throttle response.

The Stock Mercedes Benz A-Class, CLA-Class, GLA-Class, GLB-Class Factory Filter Limitation

The OEM intake on modern Mercedes compact platforms relies on a dense, multi-fold cellulose paper filter. While adequate for baseline dust collection, the factory paper media creates a measurable pressure drop across the intake tract as manifold pressure climbs under boost. Paper fibers swell in humid conditions and surface-load particulate rapidly, choking airflow to the turbocharger inlet.

This restriction increases pumping losses, dulls transient pedal response on the M260 and M282 engines, and forces routine replacement at fixed service intervals.

The Engineering Solution

The BMC FB01045 filter upgrades the intake system using multi-layered, low-viscosity oiled cotton gauze encased in an epoxy-coated alloy mesh. Constructed using a single-piece "Full Moulding" process without welded joints, the soft polyurethane perimeter forms an airtight seal against the factory airbox lip to eliminate blow-by.

This oiled cotton matrix permits significantly higher volumetric flow rates than cellulose while capturing airborne particulates down to 7 microns. The design is completely washable and regenerable, maintaining consistent intake velocity without risking sensor contamination.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Mercedes CLA (C118/W118/X118) AMG CLA 35 (306 HP) | 2019+
• Mercedes CLA (C118/W118/X118) AMG CLA 35 Mild Hybrid (306 HP) | 2023+
• Mercedes CLA (C118/W118/X118) CLA 220 (190 HP) | 2019+
• Mercedes CLA (C118/W118/X118) CLA 220 Mild Hybrid (190 HP) | 2023+
• Mercedes CLA (C118/W118/X118) CLA 250 (224 HP) | 2019+
• Mercedes CLA (C118/W118/X118) CLA 250 Mild Hybrid (224 HP) | 2023+
• Mercedes A-Class (W177) A 220 (190 HP) | 2018+
• Mercedes A-Class (W177) A 220 Mild Hybrid (190 HP) | 2022+
• Mercedes A-Class (W177) A 250 (224 HP) | 2018+
• Mercedes A-Class (W177) A 250 Mild Hybrid (224 HP) | 2022+
• Mercedes A-Class (W177) AMG A 35 (306 HP) | 2018+
• Mercedes A-Class (W177) AMG A 35 Mild Hybrid (306 HP) | 2022+
• Mercedes B-Class (W247) B 220 (190 HP) | 2019+
• Mercedes B-Class (W247) B 220 Mild Hybrid (190 HP) | 2022+
• Mercedes B-Class (W247) B 250 (224 HP) | 2019+
• Mercedes B-Class (W247) B 250 Mild Hybrid (224 HP) | 2022+
• Mercedes GLA (H247) AMG GLA 35 (306 HP) | 2020+
• Mercedes GLA (H247) AMG GLA 35 (306 HP) | 2023+
• Mercedes GLA (H247) GLA 220 Mild Hybrid (190 HP) | 2023+
• Mercedes GLA (H247) GLA 250 (224 HP) | 2020+
• Mercedes GLA (H247) GLA 250 Mild Hybrid (224 HP) | 2023+
• Mercedes GLB (X247) AMG GLB 35 (306 HP) | 2019+
• Mercedes GLB (X247) AMG GLB 35 Mild Hybrid (306 HP) | 2023+
• Mercedes GLB (X247) GLB 220 Mild Hybrid (190 HP) | 2023+
• Mercedes GLB (X247) GLB 250 (224 HP) | 2019+
• Mercedes GLB (X247) GLB 250 Mild Hybrid (224 HP) | 2023+

OEM Cross Reference (BMC): MERCEDES-BENZ 2600940300, MERCEDES-BENZ A2600940300

Frequently Asked Questions & Fitment Warnings

Does this fit the W177, C118, H247, and X247 Mercedes Benz chassis?

Yes, this panel filter is a direct drop-in replacement for the factory airbox on Mercedes Benz A-Class, CLA-Class, GLA-Class, and GLB-Class models equipped with the M260 and compatible 4-cylinder engines. Always visually confirm your OEM airbox shape prior to installation.

Does installing this BMC filter require an ECU tune?

No, this filter operates safely within the factory airbox metering limits and does not skew mass airflow readings or trigger a check engine light.

The Mercedes Benz Precision Standard

Modern turbocharged European powertrains depend on precise mass airflow metering and absolute intake integrity. This BMC panel filter matches exact OEM housing tolerances to preserve German factory reliability, protect sensitive turbocharger compressor wheels, and ensure zero check-engine lights.