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How to Activate Optional Functions via OBD on the Mercedes A-Class

Model: Mercedes Classe A W176 - Years: 2012, 2013, 2014, 2015, 2016, 2017, 2018
Part: Checks and maintenance

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Video tutorial

This brief guide will show you the instructions to activate the optional functions of the Mercedes A-Class, as well as the B-Class and CLA. First, get in the vehicle on the driver’s side and plug the diagnostic tool into the OBD port located below; then turn on the ignition by pressing the start button once, as shown in the video.

At this point, follow the indicated procedure by going to the hidden options, activating the hidden function from the computer; from here, you will be able to activate various functions!


Updated on 23 September 2026 by ScegliAuto


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To reset the tyre pressure warning light on the Jeep Compass, inflate all tyres to the correct pressure value, which is indicated on the sticker affixed to the driver’s door pillar. Once all tyres are at this pressure, switch on the ignition and press and hold the corresponding button located to the left of the steering wheel. This will turn off the warning light, but to prevent it from reactivating, you must reset the system using an OBD scanner connected to the designated port.

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