Hengst H405WK Fuel Filter - In-Line or In-Tank

Hengst HEZ Fuel Filter H405WK

The Hengst HEZ Fuel Filter H405WK is a fuel filtration component for select Mercedes-Benz diesel applications. It uses synthetic blend filter media and is listed with fitments that include an integrated connector for the heating element on many applications.

Key Features

• Synthetic blend filter media for fuel filtration in diesel systems
• HEZ Fuel Filter product line from Hengst
• Includes connector for heating element on listed applications
• Maximum pressure rating: 6 bar
• Electrical connector: 5-pin on listed applications
• Direct-fit coverage for select Mercedes-Benz GL350, ML350, Sprinter 2500, and Sprinter 3500 applications

Product Details

Hengst H405WK is a fuel filter built for specific Mercedes-Benz diesel fuel delivery systems, including in-line and in-tank configurations shown in the fitment data. The synthetic blend media is used to help separate contaminants from fuel before they reach sensitive injection components. This part number, H405WK, also cross-references OE and aftermarket numbers such as A6420903152 and WK 820/14 for the same application.

The HEZ Fuel Filter line is positioned for diesel vehicles that require a heating-element connection and a 5-pin electrical interface on the listed applications. Compatible vehicle coverage includes Mercedes-Benz GL350, ML350, Sprinter 2500, Sprinter 3500, E350, R350, S350, GL320, ML320, R320, GLS350d, and GLE350d across the model years shown.

What It Helps Address

• Fuel contamination reaching the injection system
• Restricted fuel flow from a loaded filter element
• Cold-weather fuel system operation on listed heated applications
• Fuel delivery issues related to worn or clogged filtration
• Maintenance replacement for Mercedes-Benz diesel fuel filter service

Installation Notes

• Verify the vehicle’s year, model, and fuel system configuration before ordering.
• Match the connector style and heating-element connection to the original part.
• Confirm whether the application is in-line or in-tank, as listed in the fitment data.
• Some listed applications note spin-on or OE-number-specific configurations.
• Use clean fuel system practices during replacement to avoid introducing debris.

Quality Assurance

Hengst is an established filtration brand, and the HEZ Fuel Filter line is built for OE-style service on the listed Mercedes-Benz diesel applications. Fitment data includes direct references for 2009-2017 Mercedes-Benz models, including GL350, ML350, Sprinter 2500, and Sprinter 3500.