OEM exterior temp sensor fits Mercedes Benz GLA-Class X156 GLA 200 +more

image is example only, brand may vary

An exterior temperature sensor in a car is a device that detects the temperature outside of the vehicle. It is typically located in the front of the car, usually near the grille or on the side mirrors. The sensor measures the ambient temperature and provides the data to the car's onboard computer system.

The purpose of the exterior temperature sensor is to provide accurate information about the temperature outside of the vehicle to the driver. This information is usually displayed on the car's dashboard or infotainment system. It allows the driver to quickly and easily determine the current weather conditions, which can be helpful for planning their route or adjusting the car's climate control settings. Additionally, the exterior temperature sensor is often used in conjunction with other systems, such as the automatic headlights or the stability control system, to optimize their performance based on the current weather conditions.