Electric Cooling Fan
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2004 Mercedes-Benz CLK55, 2004 Mercedes-Benz CLK500, 2004 Mercedes-Benz CLK320, 2004 Mercedes-Benz C320, and 2004 Mercedes-Benz C32. However, it is still accessible from the selected car via links, so may be relevant.
Electronic Fan Control Module (EFCM) on Motronic ME 2.8 is controlled by the ECM. Cooling fan control module will set a DTC. Engine Coolant Temperature Sensor (ECT) faults are also monitored by the ECM and will set a DTC.
For more information on the self-diagnostic system, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.