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How to Calibrate the Air Conditioner and Discover Diagnostic Codes for the Mercedes S-Class

Model: Mercedes Classe S MK 4, W220 - Years: 1999, 2000, 2001, 2002, 2003, 2004, 2005
Part: Air conditioner

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Video tutorial

In this guide, learn the procedure for calibrating the automatic air conditioner and how to access the diagnostic menu of the Mercedes S-Class. First, get in the vehicle and turn on the instrument cluster; then press and hold the "REST" button and the recirculation button, as shown in the video.

At this point, hold down the other indicated buttons to search for errors in the air conditioning system, where the diagnosis will be displayed; finally, check the operation of the air conditioner after resolving all issues.


Updated on 22 October 2026 by ScegliAuto


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by ScegliAuto

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