Hengst E3900LB Cabin Air Filter - Front or Primary

Hengst HEZ Cabin Air Filter E3900LB

The Hengst HEZ Cabin Air Filter E3900LB is a biofunctional cabin air filter for Mercedes-Benz HVAC systems. It is built for drivers who want a direct replacement for the factory cabin filter specification, with fitment across a wide range of Mercedes-Benz C-Class, E-Class, G-Class, GLE, GLS, EQE, EQS, and AMG models.

Key Features

• Biofunctional filter media for cabin air filtration
• HEZ Cabin Air Filter product line from Hengst
• Direct-fit replacement for select Mercedes-Benz HVAC filter applications
• Cross-references OE-style part numbers used on Mercedes-Benz vehicles
• Fits multiple Mercedes-Benz models from 2012-2024

Product Details

Hengst E3900LB is a cabin air filter designed around biofunctional media, also described in the fitment data as pollen and dust filtering material on many applications. The HEZ Cabin Air Filter line is used for Mercedes-Benz interior air filtration, helping maintain cleaner air entering the HVAC system. This part number is listed for a broad range of Mercedes-Benz applications, including C300, E350, G550, G63 AMG, GLC300, GLE350, GLS450, EQE 350, and EQS 580. This part cross-references Mercedes-Benz OE numbers 166 830 02 18 and A 166 830 02 18 for the same application.

What It Is Used For

• Replacing a clogged Mercedes-Benz cabin air filter
• Restoring HVAC airflow that has become restricted by debris buildup
• Filtering pollen and dust entering the passenger compartment
• Maintaining proper cabin air quality in Mercedes-Benz HVAC systems
• Matching OE-style filter specifications for supported models

Installation Notes and Tips

Verify the vehicle year, model, and filter position before ordering, since fitment varies by application and some listings note Front or Primary placement. Confirm the OE reference number on the existing filter or service documentation when matching E3900LB to your Mercedes-Benz. For best results, replace the cabin air filter at regular service intervals and inspect the HVAC housing for accumulated debris during installation.

Quality Assurance

Hengst is an established filtration brand, and the HEZ Cabin Air Filter line is specified for OE-style Mercedes-Benz applications. The biofunctional filter media is listed across multiple Mercedes-Benz fitments, including 2012-2024 models, with direct OE cross-reference support for accurate replacement selection.