Mercedes W212 Fuel Tank Diesel OM642 OM651 80L Complete Sending Unit A2124707701

Mercedes W212 Fuel Tank Diesel OM642 OM651 80L Complete Sending Unit is an original fuel system component designed for Mercedes vehicles with diesel engines. It ensures stable diesel storage and proper cooperation with engine accessories, which translates into safe and predictable vehicle operation. This is a solution for users looking for a factory-fitted tank with a large operating capacity.

Specifications and technical data

• SKU: A2124707701
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124707701
• Substitutable numbers: A2124707701, A 212 470 77 01, A2124700194, A 212 470 01 94, A2124700400, A 212 470 04 00, BG
• Weight: 150
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and compatibility with diesel engines

The presented fuel tank has been designed to work with diesel units from the OM642 and OM651 families, used in Mercedes E-Class W212 generation models. The design is adapted to the operating parameters of the diesel injection system, which promotes stable engine power supply across the full load range. The nominal capacity of 80 liters allows for comfortable planning of longer routes without the need for frequent refueling.

Construction and role in the fuel system

The tank belongs to the Fuel tanks and filler pipes group, responsible for the safe storage of fuel and its delivery to the power supply system. The design is intended to work with the factory fuel filler, lines, and accessories mounted in the W212 chassis. The properly shaped geometry of the tank promotes correct venting and reduces the risk of air entering the system at low fuel levels.

The component is made of materials selected for their resistance to diesel fuel and typical operational loads, such as temperature changes, vibrations, and mechanical stresses resulting from suspension operation. As a result, the tank maintains its tightness and dimensional stability under typical vehicle usage conditions.

Performance parameters and benefits of installation

The large operating capacity promotes economical operation – you visit the gas station less frequently, and the power supply system is provided with adequate fuel reserves even during intensive driving. Using a dedicated tank for a specific generation of Mercedes W212 facilitates installation and reduces the need for modifications, which is important both in professional workshops and for DIY repairs.

Proper fitment to the chassis and mounting points translates into stable seating of the tank, which minimizes unwanted vibrations and noise. This is particularly important in higher-class cars, where appropriate acoustic comfort and powertrain refinement are expected.

Component condition and service application

The offered tank is a used item, which makes it an attractive cost-effective alternative to new components while maintaining factory geometry and purpose. It works well both for typical post-accident repairs and for replacing worn or leaking tanks in vehicles used intensively, e.g., in fleets or with high annual mileages.

By maintaining the original design, the tank can be used as a direct replacement for the factory component, which facilitates the service process and reduces vehicle downtime. This is a practical solution for workshops specializing in the Mercedes brand and users who want to restore the full efficiency of the fuel system without unnecessary modifications.

Technical support and selection by part numbers

The component has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification and selection for a specific vehicle equipment version. In case of doubts regarding fitment to a given W212 unit, it is worth using the VIN number and service documentation to confirm structural compatibility.

To better understand the role of the tank in the entire power supply system and the principles of its operation, it is worth reading the guide on diagnostics and maintenance of the fuel system: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. The article discusses, among other things, the selection of parts by OEM numbers and practical service tips.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as lines, filler pipes, or additional mounting components, check the available parts in the Mercedes Fuel tanks and filler pipes category.