Where is the OBD port on a Mercedes-Benz?
2 Answers
The OBD port on a Mercedes-Benz is located below the left side of the steering wheel. You can see it by opening the cover. The OBD port is a 16-pin female connector with a trapezoidal shape. Some models may have a protective cover over the OBD port. Common OBD port colors are black, white, or blue. Taking the Mercedes-Benz GLC 2021 260L 4MATIC Dynamic model as an example, its body dimensions are 4764mm in length, 1898mm in width, and 1642mm in height, with a wheelbase of 2973mm. The vehicle features multi-link independent suspension both front and rear, and is equipped with a 2.0T inline four-cylinder turbocharged engine, delivering a maximum power of 145kW and a maximum torque of 320Nm, paired with a 9-speed automatic transmission.
I've been driving a Mercedes for almost ten years, and the OBD port is usually located below the steering wheel, under the dashboard. Just bend down and reach in to feel for it—there's often a small plastic cover or it might be exposed for easy device connection. It's best to turn off the engine when searching, crouch low, and use a flashlight to look. Avoid yanking the connector to prevent damaging the pins. Mercedes designs it thoughtfully, placing it consistently on the driver’s side for easy access during routine maintenance, unlike some cars that hide it in hard-to-reach spots. If you drive a C-Class or E-Class, the port is slightly above the footwell on the left side, though the exact position may vary slightly by model, but generally, it’s in the same area. I recommend keeping a small diagnostic tool handy to check fault codes yourself, saving trips to the repair shop. If you can’t find it, don’t force it—just check the vehicle manual, which always marks it clearly.
