Cold Air Intake Spacer Kit for Mercedes Benz E-Class CLS-Class SL-Class S-Class GL-Class E550 CLS550 SL550 S550 GL550 (2011-2020) 4.7L

High-Flow Cold Air Intake Spacer Kit for 2011-2020 Mercedes Benz E-Class, CLS-Class, SL-Class, S-Class, GL-Class (W212, C218, R231, W221, W222, X166)

What it Does: The Cold Air Intake Spacer Kit raises the factory air filter assembly out of the restricted lower intake tract on 2011-2020 Mercedes Benz 4.7L BiTurbo vehicles to increase mass airflow volume and enhance turbo spool response.

The Stock Mercedes Benz M278 Intake Airflow Restriction

Factory intake packaging across the twin-turbocharged M278 DE46AL platform seats the air filtration elements deep inside tight lower airbox housings directly above radiant exhaust manifold heat. This geometry introduces extreme boundary-layer turbulence and limits the total surface area exposed to laminar incoming air. At higher boost pressures, the factory inlet tract chokes compressor feed lines, increasing intake air temperatures (IATs) and forcing the ECU to retard ignition timing under sustained wide-open throttle loads.

The Engineering Solution

This intake spacer kit alters the physical plane of the intake box assembly by elevating the filtration plane above the bottom housing bottleneck. By increasing the plenum volume immediately preceding the turbocharger compressor inlets, this design optimizes cross-sectional flow distribution across the filter face, reduces pre-turbo vacuum loss, and minimizes hot-air stagnation. Fabricated with direct-fit mounting interfaces, the kit allows unchoked induction flow to satisfy peak volumetric efficiency without triggering mass airflow error codes or requiring sensor harness relocation.

What's Included

• Cold air intake spacer kit (filters not included)
• Mounting hardware

Technical Specifications

Compatibility

• 2011-2020 Mercedes Benz E-Class E550 4.7L
• 2011-2020 Mercedes Benz CLS-Class CLS550 4.7L
• 2011-2020 Mercedes Benz SL-Class SL550 4.7L
• 2011-2020 Mercedes Benz S-Class S550 4.7L
• 2011-2020 Mercedes Benz GL-Class GL550 4.7L

Frequently Asked Questions & Fitment Warnings

Does this fit the W212, C218, R231, W221, W222, and X166 E-Class, CLS-Class, SL-Class, S-Class, GL-Class?

Yes, this is a direct fit for the 2011-2020 Mercedes Benz E-Class, CLS-Class, SL-Class, S-Class, and GL-Class equipped with the M278 4.7L biturbo engine. This kit is a spacer-only system and is distinct from complete induction replacement kits.

Are intake air filters included in this kit?

No, air filters are not included; this kit contains only the spacers and installation hardware engineered to fit your existing OEM or performance drop-in filters.

The Mercedes Benz Precision Standard

Engineered for high-output European twin-turbo platforms, this spacer kit maintains OEM sensor geometry and vacuum tolerances to ensure smooth power delivery without triggering check engine lights.