A repetitive clicking noise from behind the center area of the dash panel is usually caused by a broken stepper motor actuating arm. The actuating arm controls the direction of air flow in the climate control system. Disassembly of the center console will be required to access and change the broken arm with the updated, reinforced part.
Clicking Noise From Behind Center of Dash on Mercedes-Benz C320 4MATIC
Average mileage: 121,122 (100,000–150,000)
10 people reported this problem
3 people shared problem details
2004 Mercedes-Benz C320 4MATIC125,000Visitor
Same clicking from broken stepper motor actuating arm
I heard the problem months ago and now have little air flow from the upper part of vent. When AC is on the blower is working at feet level but very little air movement in upper vent.
2004 Mercedes-Benz C320 4MATIC119,500Visitor
When I start my car, I hear clicking sounds (8 to 9 clicks)
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