Mercedes A209 R171 W204 W211 Fuel Injector 1.8 Petrol SLK 200 A2710780549

Mercedes A209 R171 W204 W211 Fuel Injector 1.8 Petrol SLK 200 is an original fuel system component designed for Mercedes 1.8 petrol engines. The precisely calibrated spray pattern ensures stable engine operation, uniform combustion, and predictable throttle response. As a result, this fuel injector provides a solid foundation for restoring proper engine performance and factory parameters.

Specifications and technical data

• SKU: A2710780549
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2710780549
• Substitutable numbers: A2710780549, A 271 078 05 49, Numer czesciA 271 078 00 23, NumerczesciA2710780023
• Fuel type: Petrol
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and compatibility

The presented petrol injector is designed for selected Mercedes models with 1.8 engines, such as the A209, R171, W204, W211, and SLK 200. The design, compliant with manufacturer standards, allows for the maintenance of factory fuel dosage parameters, which translates into predictable performance and stable engine operation across the entire rev range. Thanks to the solutions developed by the Mercedes brand, this component works with the original engine management system, maintaining the correct opening and closing characteristics of the injection valve. This is crucial wherever dosage repeatability, proper fuel spray formation, and compliance with the injection maps stored in the ECU are required.

Petrol injector operating characteristics

The injector from the Injector Nozzles category is responsible for the precise dosing of fuel into the combustion chamber, which has a direct impact on dynamics, fuel consumption, and exhaust emissions. In a 1.8 petrol engine, the following are key:

• stable opening and closing of the injection valve under varying fuel pressure,
• proper atomization of petrol to achieve a homogeneous mixture,
• dosage repeatability at different loads and engine speeds,
• cooperation with the ignition system and sensors controlling engine operation. A properly selected petrol injector helps reduce jerking, misfires, power drops, and excessive fuel consumption. In practice, this means a smoother ride, better throttle response, and stable idle speed.

Condition, origin, and advantages of using a used part

The offered item is a used petrol injector, sourced from a dismantled Mercedes vehicle. Choosing an original used part is often a beneficial solution compared to cheap replacements of unknown origin – you maintain factory specifications while optimizing repair costs. This type of component is particularly attractive when servicing several cylinders at once, where consistency in the characteristics of all injectors is required. Before installation, a standard workshop procedure is recommended, including leak testing, checking operation on a test bench, and verifying electrical parameters. This allows the injector to safely return to service in the fuel system, restoring correct fuel dosage and engine stability.

Benefits of a properly selected petrol injector

Selecting the right injector for a Mercedes 1.8 petrol engine translates into a number of practical operational benefits:

• more uniform engine operation across the entire rev range,
• reduction of cold and warm start problems,
• reduced risk of excessive wear on the catalytic converter and lambda sensors,
• maintaining fuel consumption at levels close to factory values,
• better refinement at low speeds and in city traffic. In the case of symptoms such as rough idling, power loss, smoking, or increased fuel consumption, one of the key elements to verify is the petrol injector. Its efficiency has a direct impact on driving safety and comfort, as well as the durability of other exhaust system components.

Diagnostics and prevention of the injection system

Although the offered item concerns a petrol engine, the principle of caring for the injection system is common to all types of units. It is worth knowing the typical symptoms of wear and improper injector operation in order to react in time and avoid costly repairs. You can read more about the symptoms and consequences of neglect in this area in the article: diesel injector faults – symptoms, effects, and diagnostics, which helps to understand how important regular inspection of fuel dosing components is. If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as nozzles, tips, or complete injectors, check the available parts in the Mercedes Injector Nozzles category.