Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Where is the OBD port located in the Mercedes S-Class?

Model: Mercedes Classe S W140, MK 3 - Years: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
Part: Checks and maintenance

See other generations:
Video tutorial

In this video, you can see where the OBD diagnostic port is located in the Mercedes S-Class W140, useful for example if you need to scan for errors recorded by the control unit. As shown, the port is not located under the dashboard like in most vehicles, but is instead positioned inside the engine compartment, specifically under the plastic cover located behind the right headlight.

The layout of the port also differs from the current standard, which is why it is highly recommended to find the pinout diagram online.


Updated on 6 September 2026 by ScegliAuto


Related tutorials

Where is the OBD port located in the Mercedes S-Class W222?
Where is the OBD port located in the Mercedes S-Class W222?
Mercedes Classe S (2013-2020 / MK 6, W222) .. If you own a Mercedes S-Class W222 and want to find out where the OBD port is located, all you have to do is carefully read the.. …
Where to Find the OBD Port on a Mercedes S-Class W140
Where to Find the OBD Port on a Mercedes S-Class W140
Mercedes Classe S (1991-1998 / W140, MK 3) .. mini guide for all you owners of a Mercedes S-Class W140 (1991-1998), we will discover where the OBD port is located, allowing you to easily connect.. …
How to Reset the Check Engine Light on a Mercedes S-Class?
How to Reset the Check Engine Light on a Mercedes S-Class?
Mercedes Classe S (2013-2020 / MK 6, W222) .. To reset the check engine light on a Mercedes S-Class, connect a diagnostic tool to the vehicle's OBD port to identify the error's cause. The OBD port.. …

Other guides you may be interested in

Where to Find and How to Remove the Spare Wheel of a Peugeot 5008?

The spare wheel of a Peugeot 5008 is located under the rear of the vehicle. To remove it, you need to lift the third row of seats to access the fixing bolt that holds the spare wheel in position. Using the correct spanner, proceed to unscrew the fixing bolt until the wheel is no longer secured. At this point, you can extract the spare wheel from underneath the vehicle. Once you have completed this step, you are free to fit the spare wheel. Ensure you correctly remount the spare wheel and securely tighten the fixing bolt when you are finished.

Watch the video!


by ScegliAuto

More videos