Standard Ignition AX181 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Mercedes-Benz

Standard Ignition AX181 is an ambient air temperature sensor built for direct replacement on a wide range of Mercedes-Benz and Smart applications. It uses a push-on attachment, a single oval female plug-in connector, and a black housing for a clean OE-style fit.

Compatible With Mercedes-Benz C300, C63 AMG, E350, GLC300, GLE350, S550, Sprinter 2500, and more, this sensor supports accurate outside air temperature input for the HVAC system and instrument display. The AX181 also cross-references Dorman - HELP 76016 for the same application.

Key Features

• Ambient air temperature sensor for HVAC and temperature display systems
• Push-on attachment method for straightforward mounting
• Oval female connector with plug-in design
• Black finish for OE-style appearance
• Male pin terminals with 2-terminal configuration
• No wiring harness included
• No mounting bracket included

Detailed Product Information

Standard Ignition AX181 is designed for vehicles that rely on an external temperature signal to manage climate control logic and display ambient temperature information. It is a direct-fit style replacement for many Mercedes-Benz models, including C300, E350, GLK350, ML350, SL550, and Sprinter 2500, as well as Smart Fortwo and Chrysler Crossfire applications listed in the fitment data. The AX181 part number is also commonly searched as a replacement for OE-style ambient temperature sensor applications across Mercedes-Benz platforms.

This sensor is a practical choice when the original outside air temperature reading becomes inaccurate, intermittent, or unavailable. Standard Ignition AX181 is built with a single port, female connector, and pin-style terminals to match the vehicle-side connection used on supported applications.

Common Issues This Part Can Address

• Incorrect outside air temperature readings on the dash or climate display
• Intermittent ambient temperature signal to the HVAC system
• Faulty sensor output after impact, corrosion, or age-related wear
• Temperature display errors that affect driver information accuracy
• Replacement needs after connector or sensor housing damage

Installation Notes and Tips

Verify connector shape, terminal style, and mounting style before installation. This sensor uses a push-on attachment and does not include a wiring harness or mounting bracket, so inspect the vehicle connector and mounting point for damage or corrosion before swapping the part. For best results, compare the original sensor location and connector layout to the AX181 before final installation.

Fits 2008-2021 Mercedes-Benz C300, N/A; fits 2008-2021 Mercedes-Benz C63 AMG, N/A; fits 2014-2021 Mercedes-Benz CLA250, N/A; fits 2016-2020 Mercedes-Benz GLC300, N/A; fits 2012-2020 Mercedes-Benz Sprinter 2500, N/A; fits 2008-2020 Mercedes-Benz S63 AMG, N/A.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and sensor replacement parts. AX181 is built to match the connector and mounting style used on the listed applications for dependable OE-style service.