Wix 33643 Fuel Filter

WIX 33643 Fuel Filter for Mercedes-Benz

The WIX 33643 fuel filter is a complete in-line fuel filter built for light-duty service and consistent fuel system protection. It uses cellulose media and a 1 GPM flow rate to help maintain fuel delivery in normal driving and severe conditions, including stop-and-go traffic, short trips, dirt roads, construction zones, and highway use.

Compatible with a wide range of Mercedes-Benz applications, including Mercedes-Benz C-Class, E-Class, S-Class, SL-Class, and G-Class models, this filter is a direct-fit service part for vehicles that use 5/16 in. inlet and outlet connections.

Key Features

• WIX fuel filter, part number 33643
• Complete in-line fuel filter style
• Cellulose filter media for application-specific fuel filtration
• 5/16 in. inlet and 5/16 in. outlet
• 1 GPM flow rate
• 6.300 in. height with closed top design
• Built for light-duty fuel system service

Detailed Description

WIX 33643 is engineered to provide dependable fuel filtration for Mercedes-Benz vehicles that require a complete in-line fuel filter. The filter media is matched to the application and fuel type, helping support clean fuel delivery under everyday driving and more demanding conditions. Its dimensions and connection size make it a practical replacement for service intervals recommended by the original equipment schedule.

This part cross-references Bosch 0 450 915 003 and Mann-Filter WK 720 for the same application. It also appears in fitment for Mercedes-Benz C350, Mercedes-Benz G550, and Mercedes-Benz SL550, making WIX 33643 a relevant search match for owners looking for a Mercedes-Benz fuel filter replacement by part number.

What It Helps Address

• Restricted fuel flow from a loaded or aging filter
• Contaminants entering the fuel system
• Rough running caused by inconsistent fuel delivery
• Service replacement needs at OEM-style intervals
• Fuel system maintenance on Mercedes-Benz C-Class, E-Class, G-Class, and SL-Class models

Installation Notes and Tips

Verify inlet and outlet size before installation: this filter uses 5/16 in. connections. Confirm the vehicle’s fuel filter location and routing before removal, and replace the filter according to the service interval specified for the application. For best results, match the part number to the vehicle’s original equipment reference when servicing Mercedes-Benz C230, C320, E320, or G500 models.

Quality Assurance

WIX states that its fuel filters are built with high-quality materials, efficient application-specific media, and durable construction for consistent performance across normal and severe driving conditions. The 33643 is listed as a recommended replacement for OEM fuel filter change intervals.