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 C240
Average mileage: 104,988 (27,000–255,783)
93 people reported this problem
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Viewing 1 - 20 of 50 problem details
So, is it okay to drive the car if the Stepper Motor Actuating Arm is broken? I certainly would not want to further damamge the car. Just want to know how much time I have to get my monies together.
2003 Mercedes-Benz C240 140,000 mi, Visitor
recently began - hear the "clicking noise" upon startup for about 60 secs - seems to be from the AC/Heater so I turn it off and on. while the noise is "clicking" air flow is greatly impared. Not liking what I read here as sounds like it is going to be yet another expensive repair from what I though was a High Quality Automobile - Mecedes - NOT! just a very expensive automobile to maintain and OFTEN! very disappointed!
2003 Mercedes-Benz C240 76,000 mi, Visitor
clicking noise under the center of the dash upon starting the vehicle. Heater only blows at the windshield and never anywhere else no matter how I set the air flow controls.
2002 Mercedes-Benz C240 27,000 mi, Visitor
Clicking sound behind the dash. Clicks 8-9 times then stops. Dealer diagnosed as a $439 repair.
2003 Mercedes-Benz C240 74,000 mi, Visitor
clicking noise from center dash area. direction of airflow no longer operative. tt would occur for 3 minutes then stop. After 6 month broken rod shorted out a wire inside dash causing fire and driver side fuse box to melt. noise stopped after fire. did not fix car . rewired fuses 31 + 32 and after 3 months of sending pictures to mdusa they said it was not mercedes problem
2001 Mercedes-Benz C240 60,000 mi, Visitor
broken stepper motor actuating arm
2002 Mercedes-Benz C240 168,000 mi, Visitor
same clicking noise behind dashboard
2001 Mercedes-Benz C240 110,000 mi, Visitor
clicking noise when the car is started that goes away after may be 20 seonds.
2004 Mercedes-Benz C240 60,000 mi, Visitor
As described by others, clicking noise heard when turning on Heat / AC. Sounds like flappers moving in vents as air flow changes between outlets. Usually stops after a few minutes. Quita annoying.
2004 Mercedes-Benz C240 74,000 mi, Visitor
Price of $1200.00 to fix and this prices not from the dealer.
I am planning on selling this car...i just want to know how to stop the noise!!
2003 Mercedes-Benz C240 117,800 mi, Visitor
clicking noise behind dash
2002 Mercedes-Benz C240 255,783 mi, Visitor
I have the exact same problem. At every start there is a ticking sound coming from behind the air vent and last for few minutes. Air conditioning has been effected since then.
2001 Mercedes-Benz C240 98,000 mi, Visitor
AC blows at the feet and barely blows through the vents.
2003 Mercedes-Benz C240 73,000 mi, Visitor
When starting the car you could hear a "flapping" noise from the ac vent. Then it would stop after 30 seconds or so. Problem diagnosed as the stepper motor. Replaced at a high repair cost.
2005 Mercedes-Benz C240 123,102 mi, Visitor
Believe i have a stepper motor problem...clicks at start up then stops. Tried to reset the blower functions with front and circulating press and it clicks nonstop with that. More annoying than anything. One shop quoted $1200.00 to fix which seems high. Any thoughts?
2005 Mercedes-Benz C240 118,000 mi, Visitor
like someone knocking in back of engine when starting vehicle. It cost 675 to fix
2001 Mercedes-Benz C240 117,000 mi, Visitor
Clicking behind dash
2001 Mercedes-Benz C240 64,000 mi, Visitor
clicking noise under passenger dash, goes away after a minute or less but comes back every time I start the car. I haven't taken in for repair yet, plan to get a quote but may just turn the car in and buy a new one. Definitely won't be a Mercedes Benz, just too unreliable!!
2001 Mercedes-Benz C240 130,000 mi, Visitor
Broken motor stepper accumulator arm