Question about 2001 Mercedes-Benz C-Class

1 Answer

Air con On start up the climate control clunks and clicks for about 20 secs before settling down. Plus there is a noise like a noisy tacho cable behind the dash that doesn't go away. Help please

Posted by on

  • Strac May 27, 2008

    Thanks my friend.
    Sounds like a expensive job. any Idea how long this would likely to take.
    Could there be a short cut?

  • Strac May 28, 2008

    Thanks Bryce

    You are a star.




1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

There is probably a worn arm on one of the flaps inside the heater box. The noise you hear will be one of the motors turning and wearing away one of the flaps, dash out job im afraid.

Posted on May 25, 2008

  • Bryce Cunningham May 27, 2008

    The problem with this fault is that there are five to eight motors and arm on the heater box so it could be one easily accessable or it could be the hardest one to get to. The two most easily accesssible are above the passenger kick panel. (Three screws). If not it is about a four hour job to remove the dash plus the cost of the actual motors and arms. If its not getting done at an MB dealer you will need to reset and personalise the motors, this is done by switching the ignition on and pressing the recirculation and rear window defrost buttons at the same time until they both start flashing, this will last 20 to 30 seconds.

    Hope everything goes okay





1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 1988 bmw 325i had the entire a/c system removed will that affect the heat on my climate control also

Hi Vince.
No this shouldn't affect the heat on your climate control, as the air-con is a separate entity the heat is transferred from the engine, but the air-con cold is a complete unit on its own so should not affect heating the car, just cooling it inside. hope that helps

Oct 23, 2014 | BMW 325 Cars & Trucks

2 Answers

Clicking noise idling

check whether is your belt,as it is old one ( if it is ) and when is cold is giving the clicking noise but when it become hot it stops. Good to try is if you do have a silicone spray do spray on the belt when you do have the noise and if is the belt surely you will notice the difference.
Good luck

Mar 10, 2014 | 1995 Buick Riviera

1 Answer

Noise comeing from the dashboard

I am guessing you have a mechanical tacho, these have a flex drive comes off the cam or crankshaft, when these are not engaged in the drive correctly, it flicks off center causing a click or grinding noise from the tacho housing. to cure just undo tacho cable engage center cable reconnect outer cable, problem should be cured, if not send me a message with more information

Dec 02, 2013 | Cars & Trucks

2 Answers

2004 Chrysler Voyager, had an acrid burning smell and a lot of smoke when heater is turned on, also a rattling/squealing noise, all stops when heater turned off?

you more than likely have a sciezed air con compressor. most modern cars have climate control which uses air con even when demisting and when engaged the electric clutch tries to engage but the pump itself will not turn, clutch will get red hot and burn your belts

Nov 25, 2013 | 2004 Chrysler Voyager

1 Answer

Clicking noise no heat

Cloged /stucked hot water tap ,the command does not open way for hot water.Must track the tubes,wires to find the tap.Cloged water system.Cleaning aditive several times it's a luck shoot

Oct 24, 2013 | Audi Cars & Trucks

1 Answer

Air con pump noisy

c\heck compressor bearings before it is damaged

Dec 12, 2012 | 2007 Suzuki Grand Vitara 4WD

1 Answer

First thing that started the outside temperature reading would flicker and finally settled to the steady reading. Then we started getting cold air on the passenger side and warm air on the driver side. ...

That is two separate problems. The "Flickering" of the outside temperature thermometer might be normal to some extent. Sometimes, the voltage from the sensor is at a point where it could be say, 31 degrees F or 32 degrees F. The display may flicker back and forth between 31 and 32 very rapidly until the voltage changes just enough to go make it go solid one way or the other. It probably does this all the time, but you didn't notice until you were paying attention to the temperature problems inside the car. (One actually has absolutely nothing to do with the other.)

The cracking and popping noises you are hearing from the temperature door and the difference between the temperature on the driver's side and the passenger side are the same problem. Apparently, you have dual zone climate control. This is usually caused by one of the temperature doors sticking and either stripping the gears inside the door control actuator or breaking the door itself. If you have both sides set at "HOT", the side that is cold is your problem-child. This will usually also set a fault code in your climate control module and may make your climate control display flash. (but it doesn't always flash when there is a code present)

Jan 28, 2011 | 1997 Buick LeSabre

1 Answer

Climate control doesnt blow cold air

sounds like you need your air-con re-gassed

Aug 31, 2009 | 2002 Cadillac Seville

1 Answer

Climate control display problem

they alway have problems on the rear electricakl conector, wigle the conector and if goes on an off then get another dispaly unit

Jun 13, 2008 | 1998 BMW M3

Not finding what you are looking for?
2001 Mercedes-Benz C-Class Logo

266 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers


Level 3 Expert

77169 Answers

Joseph Prosser

Level 3 Expert

771 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides