Engine Version Code
WARNING: This page is about a different car, the 2000 Mercedes-Benz C43, 2000 Mercedes-Benz C280, 1999 Mercedes-Benz C43, and 1999 Mercedes-Benz C280. 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.