Clicking Noise From Behind Center of Dash on Mercedes-Benz C320

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 105,880 (27,503–249,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
118 people reported this problem
Viewing 1 - 20 of 60 comments
clicking when you start car. then stops after 3-4 min. sound comes from top of dash board
Every time the car starts I hear a clicking coming from behind the dashboard. It clicks for about 1 minute and then stops. I don't hear it again until the car is started again. If I start the car and then turn it off the clicking continues for about a minute and then stops.
Once I start the car, I hear a clicking noise from the behind the dash. When it started it was only about 45 seconds, now it is going on for about 1 1/2 minutes to 3 minutes. Now I hear at least two motors clicking. It affects the AC and the Heater function, to the point that the AC will run by itself when turned off, Half my windshield will not defrost (Passenger side) and I believe it has affect the entire AC system.
This has happened twice, first time covered by warranty,now doing it again, too expensive to fix.
Clicking noise behind dash board.
Clicking noise for about 8 times every time I start the car
Clicking repeating noise coming from inside the dashboard. Not all the time but I have heard this quite enough...
clicking noise 45 seconds after engine started
Everytime I start my car there is a very audible clicking noise from behind my dash. Sometimes when it is very cold there is not a noise. And when there isn't a noise, the heat doesn't work.
Clicking noise for about three minutes before stopping. Every time you start the car.
Starts up clicking noise and stops suddenly for no apparent reason.
Gotta take out the dash and replace a few motors and plastic clips. 6-10 hours depending on ability and tools
Clicking from behind the dash, no air blowing at feet.
I also had this problem along with several others started to appear right after the 100,000 mark on mileage. I have had several major issues for different failures like major oil leak that created failure of three/3 out of six cylinders (cost $2500), left seat control module two times (cost >$1200 every time), ESD failure (cost $2000), that locked my steering wheel, fuel pump and filter failure (cost $1200), two other reoccurring issues that are hard to explain and so on... like I can never get rid of light lamp/bulb failure signs even after I have replaced many of them over time. I don't think Mercedes even care about users' concerns any more. I think they are trying to get into car service business instead of selling reputed reliable cars.
I have a clicking behind the dash for abour 3 minutes after each start.
Had clicking noise, mechanic found three actuators bad and replaced all ten because of dash removal labor cost of $1,000.plus
There is a cliclking noise when I start the car first a fairly quiet one for about 30 seconds than a louder one for another 45 seconds.
yes me to clicking sound
Slow Clicking noise for about 60 seconds coming from dashboard only when car is started. Happened after I had to replace window wiper motor because blades were stuck in an upright position but worked ok. Mechanic said only way to repair is replace motor for 650.00.