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.
Car Problem Reports
Mercedes-Benz C320 Broken Stepper Motor Actuating Arm May Cause Clicking Noise From Behind Dash
Mercedes-Benz C320 Problem
Average Mileage: 102,918 mi (36,000 mi - 205,000 mi)
Visitor, 2002 Mercedes-Benz C320, 123,000 mi
clicking when you start car. then stops after 3-4 min. sound comes from top of dash board
Clicking repeating noise coming from inside the dashboard. Not all the time but I have heard this quite enough...
Visitor, 2001 Mercedes-Benz C320, 103,000 mi
CLICKING NOISE FROM BHIND OF DASH . STOPS WHEN I TURN ON HEATER FAN
Visitor, 2004 Mercedes-Benz C320, 78,000 mi
Clicking noise behind dash board.
Visitor, 2001 Mercedes-Benz C320, 100,000 mi
Clicking noise for about three minutes before stopping. Every time you start the car.
Visitor, 2001 Mercedes-Benz C320, 128,000 mi
This has happened twice, first time covered by warranty,now doing it again, too expensive to fix.
Visitor, 2003 Mercedes-Benz C320, 79,000 mi
yes me to clicking sound
Visitor, 2001 Mercedes-Benz C320, 109,500 mi
Visitor, 2002 Mercedes-Benz C320
Same problem and does not heat inside of the car. My car has 85000 miles at present
Visitor, 2003 Mercedes-Benz C320, 65,000 mi
Clicking noise for about 8 times every time I start the car