Mercedes W168 W202 W211 Engine Air Intake Temperature Sensor A0005422818

The Mercedes W168 W202 W211 Intake Air Temperature Sensor is a component from the air and fuel intake sensors category, designed for precise measurement of intake air temperature in selected Mercedes models. A correct signal from the sensor allows the engine control unit to properly dose fuel, ensure stable engine operation, and predictable throttle response.

Specifications and technical data

• SKU: A0005422818
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0005422818
• Substitutable numbers: A0005422818, A 000 542 28 18
• Category: Air Intake & Fuel Sensors

Purpose and Role in the Intake System

The intake air temperature sensor in Mercedes W168, W202, and W211 series vehicles is responsible for measuring the temperature of the air drawn into the intake system. Based on this signal, the engine control unit adjusts the fuel injection amount, ignition timing, and other operating parameters, which translates to:

• stable idle speed,
• smooth acceleration across the entire RPM range,
• more predictable response to load changes,
• reduction of excessive fuel consumption.

A functional sensor in the intake system is particularly important in conditions of significant ambient temperature fluctuations, where an incorrect reading can lead to uneven engine running or a drop in performance.

Benefits of Using an Original Mercedes Sensor

The original Mercedes intake air temperature sensor ensures electrical characteristic compatibility with the engine control unit used in W168, W202, and W211 models. This means:

• the signal from the sensor is stable and repeatable across the entire operating temperature range,
• the control unit does not require software adaptation or modification,
• the factory logic of the injection and ignition systems is maintained.

Compared to aftermarket alternatives, a component from the air and fuel intake sensors group offered by Mercedes reduces the risk of diagnostic errors, accidental warning light illumination, and problems with entering limp-home mode.

Condition, Verification, and Preparation for Installation

The offered sensor is a used part, meaning it has been removed from a vehicle and verified for correct operation. This type of part is a good choice when aiming to maintain original specifications while optimizing repair costs.

Before installation, it is recommended to:

• check the socket and wiring harness for corrosion and mechanical damage,
• inspect the seal at the sensor's mounting point in the manifold or intake pipe,
• perform basic computer diagnostics after installation to verify temperature readings.

Diagnostics and Connection to the Fuel System

Incorrect readings from the intake air temperature sensor can manifest as, among other things, increased fuel consumption, smoke, jerking during acceleration, or errors stored in the engine control unit. In many cases, these faults are analyzed in conjunction with the operation of the fuel system, injectors, and pump.

If you want to understand the relationships between air temperature measurement, fuel delivery, and injector operation more broadly, the article describing the construction and operation of the fuel supply system will be helpful: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair. There you will find practical tips on diagnostics, selecting parts by OEM numbers, and principles of proper operation.

Selection and Other Mercedes Air and Fuel Intake Sensors

When selecting a sensor for a specific Mercedes W168, W202, or W211, it is crucial to compare the markings with the existing part and verify compatibility with the specific engine type. If in doubt, it is advisable to consult the manufacturer's catalog or data from the diagnostic system to avoid installing the wrong version.

If you are looking for other sensors from the air and fuel intake sensors category for this brand's vehicles, check out the Mercedes air and fuel intake sensors available in our assortment. This will allow you to select components with similar specifications and maintain the consistency of the entire intake and fuel system.