Mercedes W169 W245 Windscreen Rain Light Sensor A1718205526

Mercedes W169 W245 Windscreen Rain Light Sensor is a precision electronic component responsible for the automatic control of windshield wipers in Mercedes vehicles. A properly selected rain sensor improves driving comfort, increases safety in difficult weather conditions, and relieves the driver from the need to manually switch wiper speeds.

Specifications and technical data

• SKU: A1718205526
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1718205526
• Substitutable numbers: A1718205526, A 171 820 55 26
• Category: Temperature Sensors

Purpose and function of the rain sensor

The rain sensor in Mercedes A-Class W169 and B-Class W245 models works with the wiper system and body electronics by analyzing the amount of water on the windshield. Based on the signal from the sensor, the controller selects the wiper operating frequency, which translates into better visibility and stable driving conditions.

This element belongs to the Temperature sensors group, which means it is part of the vehicle's wider measurement system, responsible for transmitting precise information about external conditions and the windshield environment to the controllers.

Construction and integration with vehicle electronics

Mercedes W169 W245 Windscreen Rain Light Sensor is designed as a component that works with the factory electrical installation and Mercedes comfort modules. Its design allows for:

• stable mounting within the windshield area,
• secure connection to the vehicle's electrical harness,
• precise signal transmission to the controller responsible for wiper operation.

Thanks to this, consistency with the car's original electronic architecture is maintained, and the system's reaction to changing weather conditions remains predictable and repeatable.

Benefits of using an original sensor

Using a rain sensor dedicated to specific Mercedes generations allows maintaining the factory operating parameters of the wiper system. Key advantages include:

• proper cooperation with comfort modules and body controllers,
• preservation of the automatic wiper mode function,
• consistency with factory sensitivity settings and system logic.

Choosing an original solution is particularly important in vehicles where predictable electronic behavior and the absence of communication errors between modules are essential.

Product characteristics and practical application

The offered item comes from the Mercedes component group and is intended for installation in vehicles equipped with an automatic wiper control function. The product is in Used condition, meaning it has been removed from a vehicle, and its functional parameters result from previous use.

In practice, installing a properly selected rain sensor allows for restoring full system functionality in the event of a failure of the previous sensor, problems with reaction to precipitation, or errors in the automatic wiper mode operation.

Support in selection and expanding knowledge

In the case of electronic elements such as sensors, modules, or controllers, correct matching to the specific vehicle configuration is crucial. To better understand when choosing used electronics makes sense and what to pay attention to when purchasing, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

If you are planning a comprehensive repair or upgrade of the area responsible for measuring environmental conditions in your Mercedes and need other elements from the same group, such as additional sensors, measuring elements, or systems working with the electrical installation, check the available parts in the Mercedes Temperature sensors category.