Product Overview

The fuel tank sending unit and filter assembly, OEM number A1664700490, is fitted to the Mercedes-Benz ML350, ML550, GL450, GL550, GLE350, GLE400, GLE43 AMG, and GLS450/GLS550, all built on the W166/X166 platform. Since this single part number spans four closely related Mercedes-Benz SUV nameplates across multiple engine variants, it's a high-turnover part number worth stocking in volume for distributors serving Mercedes-Benz SUV fuel system demand.

A worn or failing sending unit typically shows up as an inaccurate or erratic fuel gauge, difficulty starting the vehicle, or reduced engine power from restricted fuel flow. GSK Auto manufactures this assembly to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

1664700490, 1644701994, 164-470-19-94

(Confirm against your VIN or chassis code before ordering — these are commonly listed cross-references for this application, not a guarantee of exact fitment for every variant.)

What Is a Fuel Tank Sending Unit and Filter Assembly?

Function: The sending unit measures fuel level inside the tank and reports it to the dashboard gauge, while the integrated filter removes contaminants from fuel before it reaches the engine.

Working Principle: A float-based sending unit tracks fuel level as it rises and falls in the tank, sending an electrical signal to the instrument cluster. The attached filter element traps dirt and debris, ensuring clean fuel reaches the injectors.

Importance: On a premium SUV platform, an accurate fuel gauge and clean fuel supply are essential for driver confidence and reliable engine performance.

Common Failures & Signs: Inaccurate, erratic, or stuck fuel gauge readings. Difficulty starting the vehicle, especially when the fuel level is low. Reduced engine power from a clogged filter element. Fuel warning light behaving inconsistently with actual tank level.

Key Features

OEM-standard fitment - matches factory mounting, sensor calibration, and filtration specification for the A1664700490 application.

Precision manufacturing - sending unit and filter built to tight tolerance for reliable operation.

Long service life - built to handle sustained daily-driving use.

Excellent fitment - direct drop-in replacement, no modification required.

Tested before shipment - every unit checked for proper seal and function before packing.

Reliable performance - restores factory fuel gauge accuracy and fuel flow.

Benefits

Importers - covers fuel sending unit demand across the ML, GL, GLE, and GLS from one part number.

Wholesalers - steady demand from Mercedes-Benz's high-volume W166/X166 SUV platform.

Repair Shops - tested unit reduces comeback risk on a labor-intensive fuel tank repair.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored fuel gauge accuracy and reliable fuel delivery.

Packaging & Shipping

Standard export cartons. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This assembly is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing fuel tank sending units for the Mercedes-Benz ML, GL, GLE, or GLS? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.