Performance Air Filter for Mercedes E-Class W211 CDI Diesel (2002-2009)

Unlock the Flow: BMC High-Performance Intake Filter for Mercedes OM646/OM647/OM648 Diesel Engines

Who It’s For: Engineered for Mercedes-Benz E-Class (W211) and S-Class (W220) owners running the legendary OM-series turbo-diesel powerplants who are tired of the stock sluggishness and restrictive intake parameters.

The Symptom: The factory intake on the OM646 and OM648 engines is designed primarily for noise suppression and long-term service intervals using dense, pleated paper. This creates a significant bottleneck in the air delivery path, especially as the turbocharger attempts to spool.

When you bury the throttle to merge on the highway, that accordion-style paper filter creates a high-pressure drop, starving the combustion chamber of the oxygen density needed for a clean, snappy burn, often resulting in increased lag and a dull throttle response.

The Engineering Fix: This BMC cylindrical system replaces the restrictive OEM paper element with a high-flow, multi-layered cotton gauze media soaked in low-viscosity oil. By smoothing the fluid dynamics of the incoming air and utilizing an epoxy-coated alloy mesh, we reduce the filtration threshold to a staggering 7 microns (compared to the 10-micron OEM standard).

This allows a higher volume of laminar airflow to reach the turbocharger, resulting in faster spool times and a noticeable increase in mid-range torque across the diesel powerband.

Why Mechanics Choose This Kit

• Optimized Volumetric Efficiency: Increases the mass airflow rate to the OM-series engines, allowing the ECU to optimize fuel mapping for better combustion.
• Full Moulding Technology: Built using a proprietary single-mould process that eliminates welded joints, ensuring the filter frame will never crack or leak under high-boost conditions.
• Washable & Sustainable: Unlike paper filters that end up in a landfill every 15,000 miles, this cotton gauze media is fully regenerable using a BMC cleaning kit, making it the last filter your Mercedes will ever need.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Mercedes E-Class (W211/S211) E 200 CDI (102 HP) | 2002-2006
• Mercedes E-Class (W211/S211) E 200 CDI (122 HP) | 2002-2006
• Mercedes E-Class (W211/S211) E 220 CDI (150 HP) | 2002-2006
• Mercedes E-Class (W211/S211) E 220 CDI (170 HP) | 2006-2009
• Mercedes E-Class (W211/S211) E 220 CDI (W211) (136 HP) | 2006-2009
• Mercedes E-Class (W211/S211) E 270 CDI (S211) (177 HP) | 2002-2005
• Mercedes E-Class (W211/S211) E 270 CDI (W211) (177 HP) | 2002-2005
• Mercedes E-Class (W211/S211) E 280 CDI DPF (S211) (177 HP) | 2004-2005
• Mercedes E-Class (W211/S211) E 320 CDI (S211) (204 HP) | 2002-2005
• Mercedes E-Class (W211/S211) E 320 CDI (W211) (204 HP) | 2002-2005
• Mercedes S-Class (W220) S 320 CDI (W211) (204 HP) | 2002-2005

OEM Cross Reference (BMC): MERCEDES-BENZ 6460940104, A6110940204, A6460940104

The Performance Promise

Buy with confidence. As the leading choice for Formula 1 and GT race teams, BMC air filters bring track-tested fluid dynamics to your daily driver. Backed by real automotive experts and fast shipping.

Common Questions

Which Mercedes models does it fit?
BMC lists the W211 / S211 E-Class E 200 to E 320 CDI (2002-2009) and the S 320 CDI (2002-2005). Diesel engines only.

Is it a direct fit?
Yes. It replaces the factory element in the stock airbox with no modifications.

Can I clean and reuse it?
Yes. Wash and re-oil it with a BMC regeneration kit.

How fine is the filtration?
The multi-layer oiled cotton traps particles down to 7 microns.

What will I notice after installing it?
Sharper throttle response and a stronger intake sound.