Performance Air Filter for Mercedes-AMG C 43, C 63, SL 43, GLC & GT 43 (2022-2026)

High-Flow BMC Performance Air Filter for Mercedes Benz C-Class, SL-Class, GLC-Class (W206, R232, X254)

What it Does: The BMC FB01171 Performance Air Filter replaces the restrictive factory paper element on the Mercedes Benz C-Class, SL-Class, and GLC-Class to lower intake delta-pressure and improve turbocharger spool response.

The Stock Mercedes Benz C-Class, SL-Class, GLC-Class Intake Restriction

Factory intake elements engineered for the M139l engine rely on dense, tightly packed cellulose paper. Under wide-open throttle, these OEM paper pleats introduce significant flow resistance, choking the compressor inlet and increasing induction air temperatures. Additionally, factory paper degrades with ambient moisture and humidity over time, resulting in elevated pressure drop across the OEM airbox and sluggish transient throttle response on modern high-boost W206 and X254 platforms.

The Engineering Solution

BMC addresses these volumetric inefficiencies with a direct drop-in panel built from multi-layered, low-viscosity oiled cotton gauze supported by an epoxy-coated alloy mesh. Produced via a single-piece Full Moulding vulcanization process, the pliable polyurethane frame ensures a positive perimeter seal against the airbox housing with zero seam separation.

This architectural layout flows substantially more CFM than standard paper media, trapping contaminants down to 7 microns to safeguard the turbo compressor wheel while providing clean, unchoked induction volume.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Mercedes AMG GT (C192) 43 (421 HP) | 2024+
• Mercedes C-Class (W206/S206) C 43 AMG (408 HP) | 2022+
• Mercedes C-Class (W206/S206) C 63 AMG S E Performance (680 HP) | 2022+
• Mercedes SL-Class (R232) 43 AMG (381 HP) | 2022+
• Mercedes GLC (X254/C254) 43 AMG (421 HP) | 2023+
• Mercedes GLC (X254/C254) 63 AMG S E Performance (680 HP) | 2023+
• Mercedes GLC (X254/C254) GLC Coupe 43 AMG (421 HP) | 2023+
• Mercedes GLC (X254/C254) GLC Coupe 63 AMG S E Performance (680 HP) | 2023+

OEM Cross Reference (BMC): MERCEDES A1390942100

Frequently Asked Questions & Fitment Warnings

Does this fit the W206, R232, and X254 C-Class, SL-Class, and GLC-Class?

Yes, this is a direct fit for the Mercedes Benz C-Class, SL-Class, and GLC-Class equipped with the M139l engine. Always confirm airbox shape and OEM filter size before ordering.

Does this panel filter require an ECU tune or trigger check engine lights?

No ECU recalibration is required; the filter maintains factory mass airflow sensor scaling and operates completely CEL-free.

The Mercedes Benz Precision Standard

European performance platforms mandate exacting dimensional standards; this panel filter integrates seamlessly into the OEM airbox geometry, maintaining pristine filtration and OEM sensor compatibility under high boost.