Donmun

Hello forum, my car has 84K+ miles and just yesterday I started hearing a loud clicking sound under my dash every 3 or so seconds for probably 30 seconds and then it stops. Does anyone have any idea what could be causing it?

Thanks,
DM

turbo16lbs

Im not a mechanic but I've read this in the past and I hope its a solution to your problem.

http://c32life.com/faq.htm#Q1

Second problem down the list.

Damn you Benz and your list of problems!!

///AMG4EVER

stepper motor linkages... very common problems in W203s. Check the W203 C Class forum.

ScottW911

Yup, that's what mine did at about 50K miles. It will cost about $600 to repair if you do not have extended warranty. It is almost all labor, to remove the entire dash. Sorry about that.

SUNILP

pricing depends on which stepper linkage is broken. The stepper motor no longer needs to be replaced. Just the plastic linkage which has been modified to be thicker.

FrankW

extended warranty does not cover it. at least not my MBUSA 7yr/100k warranty.

ScottW911

OK, I should have said CPO. Mine was covered.

Donmun

what does the stepper motor control? Fixing it is going to be my weekend project.

ScottW911

The stepper motor is the linkage that controls the air direction in the ventilation. The sound you hear is the motor trying to set the vent direction, unsuccessfully.

I not sure if yours is the same, but mine sounded like someone shooting a large rubber band at the underside of mid dash, for about 30-60 seconds. Still, would have cost me $610 without the CPO.

Donmun

thats the sound i hear, well i guess i will just have to search for the schematics to see what i have to replace. After I do fix it i will try to post how i did it. But if anyone has any type of instructions on how, please let me know.

DM

SUNILP

first isolate which stepper motor it is. Some are eaiser to get to then others.

Lagunatic

Yep. Same thing happened to my C32 but at 40K miles. MB Star Warranty covered it.

andy_cyp

Crap, mines doint it too after 55k.Dayam!!!!!!!!!!!!!!

Semtex

I'm in too at 57K miles! If someone has instructions I am all ears. Thanks

Racin_fool

I listed the instructions on how to do this in the W203 section a short while back. I also have a bunch of these updated linkages just laying around if anyone is interested in doing it themselves. If anyone is local to the DFW area I can either guide you through it for a cheap fee or do it for you.

If anyone is interested in getting one of the linkages from me, just message me.

Racin_fool

here are the directions if anyone is interested in following them.

https://mbworld.org/forums/showpost....2&postcount=18