Engine Version Code
WARNING: This page is about a different car, the 1998 Mercedes-Benz C43, 1998 Mercedes-Benz C280, and 1998 Mercedes-Benz C230. However, it is still accessible from the selected car via links, so may be relevant.
The A/C push-button control module (A/C-heater control panel) engine version code may be programmed in this self-diagnostic mode. See VERSION CODING under PROGRAMMING.