Mercedes W203 Petrol M111 M112 Fuel Tank Level Sensor Sender Unit A2034701641

Mercedes W203 Petrol M111 M112 Fuel Tank Level Sensor Sender Unit is an original fuel system component designed for Mercedes C-Class W203 generation models equipped with M111 and M112 engines. This component from the Fuel pumps and level sensors category ensures precise fuel delivery control and reliable tank level readings, which translates into stable engine performance and proper integration with the vehicle's electronics. As an OEM used part, it is a sensible choice for professional repairs or replacement of fuel system components.

Specifications and technical data

• SKU: A2034701641
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2034701641
• Substitutable numbers: A2034701641, A 203 470 16 41
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented sensor integrated with the fuel pump operates in the fuel supply system of petrol engines for the Mercedes W203, specifically the M111 and M112 families. It is responsible for:

• pumping fuel from the tank to the fuel rail at the appropriate operating pressure,
• continuous monitoring of the fuel level in the tank,
• transmitting signals to the instrument cluster and the engine control unit (ECU),
• stabilizing the fuel system operation under various load conditions.

Thanks to this, the injection system receives the correct amount of fuel, and the driver receives reliable information about its level, which is crucial for the trouble-free operation of the vehicle.

Advantages of using an original Mercedes component

Choosing an original Mercedes component allows you to maintain the factory operating parameters of the fuel system. The most important benefits include:

• Full structural compatibility with the mounting socket in the fuel tank and the factory wiring harness.
• Properly matched pump and level sensor operating characteristics, consistent with the engine control unit maps.
• Stable pressure and performance parameters, essential for M111 and M112 units.
• Reduced risk of onboard electronics errors resulting from incorrect fuel level signals.

Using original components in the fuel system is particularly important in modern petrol units, where the engine controller reacts to the slightest deviations in parameters.

Operational characteristics and installation

As an integrated unit, the Mercedes W203 fuel pump and sensor allows for the replacement of the entire assembly in a single service process. This facilitates the mechanic's work and reduces the risk of leaks or problems resulting from combining different sub-assemblies. In practice, this means:

• a simplified installation procedure in the fuel tank,
• straightforward electrical connection thanks to factory connectors,
• maintaining proper cooperation with the instrument cluster and the engine controller.

This item from the Fuel pumps and level sensors category is particularly important in cases of symptoms such as hard starting, intermittent engine operation at low fuel levels, or incorrect readings on the dashboard gauge.

Selection by part numbers and technical support

When selecting this type of component for a Mercedes, it is crucial to verify compatibility using the OEM number, interchangeable part numbers, as well as vehicle data (model, year, engine type). If in doubt, it is worth seeking professional support for part identification to avoid problems with installation or incorrect fuel system operation.

If you want to better understand how to safely choose used modules and sensors, how to check compatibility, and what to pay attention to during installation, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Expanding your Mercedes fuel system service

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 in-tank pump assemblies, level sensor modules, or complete fuel cartridges, check out the available parts in the Mercedes fuel pumps and level sensors category.

For a broader perspective on the cost-effective purchase of original, used components for popular car models, you can also refer to our guide: The best used car parts – a guide to the most frequently chosen original parts.