Blower Regulator Control
WARNING: This page is about a different car, the 1999 Mercedes-Benz CLK430, 1999 Mercedes-Benz CLK320, and 1998 Mercedes-Benz CLK320. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect A/C push-button control unit connectors. Connect socket box to A/C push-button control unit right connector. See Figure. Connect DVOM negative lead to socket box terminal No. 19 and positive lead to terminal No. 1. Turn ignition on. DVOM should indicate greater than 0.9 volts with blower speed in MIN position. DVOM should indicate greater than 2 volts with blower speed in MAX position. If reading is not as specified, check blower regulator circuit. See WIRING DIAGRAMS . If circuit is okay, check blower regulator.