Mercedes W220 Fuel Sender Fuel Gauge Unit Petrol Engine A2205421017

Mercedes W220 Fuel Sender Fuel Gauge Unit Petrol Engine is a component from the Fuel pumps and level sensors category, designed for use with the petrol fuel system in S-Class W220 generation models. It is responsible for the precise reading of the fuel level in the tank and transmitting information to the instrument cluster, which is crucial for the safe and predictable operation of the vehicle. Using an OEM component allows you to maintain the factory characteristics of the fuel system without the need to resort to unreliable replacements.

Specifications and technical data

• SKU: A2205421017
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2205421017
• Substitutable numbers: A2205421017, A 220 542 10 17
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Function and role in the fuel system

The fuel level sensor in a petrol-powered Mercedes W220 is responsible for continuously measuring the position of the float in the tank and converting it into an electrical signal interpreted by the vehicle's electronics. A properly functioning component ensures:

• stable fuel level readings on the instrument cluster,
• reliable information about range and fuel reserve,
• consistent operation with other components of the petrol fuel system.

By maintaining the original electrical resistance characteristics, the sensor works with the factory installation without the need for wiring or software modifications.

Compatibility and OEM selection

The offered sensor belongs to the group of OEM components used in the Mercedes S-Class W220 generation with petrol engines. Selecting parts by the manufacturer's part number and interchangeable numbers allows you to verify compatibility with a specific body version and engine unit, which minimizes the risk of installation problems. In practice, this means the possibility of directly replacing a worn or damaged sensor with a factory equivalent with the same electrical and geometric parameters.

To better understand the connections between the fuel level sensor, pump, and tank, and to correctly select the element by OEM number, it is worth referring to the guide Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where diagnostics, selection, and operation of key components are discussed.

Characteristics of the used OEM component

The presented fuel level sensor is a used part, sourced from dismantling, which allows for maintaining factory build quality and fitment while reducing repair costs. The original design ensures:

• compatibility with the factory fuel pump basket and tank geometry in the W220,
• proper cooperation with the vehicle's electrical system,
• operating parameters specified by the vehicle manufacturer.

Choosing a used OEM component is particularly beneficial in the case of advanced luxury class models, where the precision of readings and compatibility with electronics are of great importance for user comfort.

Benefits of use in the Mercedes W220

Using an original fuel level sensor in a petrol Mercedes W220 translates into a number of practical benefits:

• Stable fuel level readings – reduction of gauge fluctuations and incorrect reserve readings.
• Full integration with the fuel system – no need for adaptation or installation modifications.
• Consistency with factory electronics – maintaining the range and reserve calculation algorithms provided by the manufacturer.
• Economical repair – the ability to restore proper system operation at a lower cost than with a new part.

Expanding the fuel system in a Mercedes

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 pump modules, additional sensors, or fuel basket components, check the available parts in the Mercedes fuel pumps and level sensors category.