A/C Push-Button Control Module
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.
Connect socket box and 3-connector test cable to A/C push-button control unit right connector. See Figure. Turn ignition on. Connect DVOM negative lead to socket box terminal No. 19 and positive lead to terminal No. 28. About 11-14 volts should be present. If voltage is not to specification, check wiring. See WIRING DIAGRAMS .