CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

Catalytic Converter bad

Old Nov 5, 2010 | 05:08 PM
  #1  
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2003 CLK430
Question Catalytic Converter bad

Hi all,

I bought a 2003 CLK430 last month with 79600 miles. Now it has 80500 miles and I stopped by at the MB dealer today as it was rattling where the cats are and they said that the warranty is expired and gave me a quote of $800 to replace one cat on passanger side. (I know I should have checked it when I got it but I did not know about the warranty and I just ignored the rattle)
I read lot of threads but could not get more information on a 03 clk430 model. I live in Oklahoma and I dont think they test the cats??
Please help......Let me know if you have done anything cheaper that fixed the problem and you did not loose any power or/and check engine light came on???
Thank you.
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Old Nov 5, 2010 | 05:17 PM
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I am in oklahoma too ...what part r u in ? Anyway, are u talking about your second cats or the primary ? or maybe u have only primary no second ? I still have mine 2nd cats from mine CLK500 if it fits you can have it for cheap.

Andy
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Old Nov 5, 2010 | 05:22 PM
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From: Jerzy
04 CLK 320 > CLK32K
03 430? Isn't that a W208?
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Old Nov 5, 2010 | 05:22 PM
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Originally Posted by M-bENZ
I am in oklahoma too ...what part r u in ? Anyway, are u talking about your second cats or the primary ? or maybe u have only primary no second ? I still have mine 2nd cats from mine CLK500 if it fits you can have it for cheap.

Andy
I live in Broken Arrow and I think I have only 2 cats. I am not sure if yours will fit mine but I will do some research and get back to you. (If they fits and I get them cheap, I will drive wherever you are ) Thanks.
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Old Nov 5, 2010 | 05:24 PM
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2003 CLK430
Originally Posted by dynomite05
03 430? Isn't that a W208?
I looked closely before posting here as this was my first post.
It says W208 upto 2002 and If I look for W209, clk430 is not included
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Old Nov 5, 2010 | 05:25 PM
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What have u done to your car already ? or is it stock ? And you should post this in W208 section ...this is W209. Do you have any pics under your car showing your cats ? thats way i can tell ...

Andy
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Old Nov 5, 2010 | 05:26 PM
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From: Jerzy
04 CLK 320 > CLK32K
lol. It was probably an early 03 production.
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Old Nov 5, 2010 | 05:26 PM
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if im not mistaken his is Cabriolet.

Andy
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Old Nov 5, 2010 | 05:28 PM
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From: Jerzy
04 CLK 320 > CLK32K
Most of use here have removed our 2nd cats. If that is what's giving you the problem, you could always go to an exhaust shop and put straight pipes in their place.
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Old Nov 5, 2010 | 05:30 PM
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2003 CLK430
Originally Posted by M-bENZ
if im not mistaken his is Cabriolet.

Andy
Yes it is. I have posted the same thread on W208 section. Thanks guys.
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Old Nov 5, 2010 | 05:31 PM
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Originally Posted by M-bENZ
What have u done to your car already ? or is it stock ? And you should post this in W208 section ...this is W209. Do you have any pics under your car showing your cats ? thats way i can tell ...

Andy
I will upload the picture once I get home. Where do you live btw?
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Old Nov 5, 2010 | 07:21 PM
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Originally Posted by sach4u1
I will upload the picture once I get home. Where do you live btw?
OKC. How long it takes to get here in the city ?

Andy
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Old Nov 6, 2010 | 01:30 PM
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Originally Posted by M-bENZ
OKC. How long it takes to get here in the city ?

Andy
It takes couple hours but I looked and there are two cats. But thanks for the help.
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Old Nov 6, 2010 | 01:49 PM
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2003 CLK430
Question

Does anyone know the part number for the cats?
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Old Nov 6, 2010 | 02:10 PM
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04 CLK 320 > CLK32K
Primary? secondary?
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Old Nov 6, 2010 | 02:47 PM
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Both?? I am not sure which one is bad. I dont know the difference.
I went to the MB dealership yesterday, the service advisor said that the passenger side cat is bad and gave me quote of $800 to replace the passenger side cat.
I also have local mechanic looked at it and said the cat is bad. He is very brilliant and going to give me a quote on monday.
I am also taking the car to the local muffler shop on monday ans see what he has to say.
Thanks.
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Old Nov 6, 2010 | 03:11 PM
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From: Jerzy
04 CLK 320 > CLK32K
It's probably a primary, you might not even have secondary.
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Old Nov 8, 2010 | 02:17 AM
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CLK 320
Major emission control parts are covered under 8 year/80k warranty as mandated by the Feds. You may want to look into this:

http://www.epa.gov/oms/consumer/warr95fs.txt

No guarantees, but worth a shot.
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Old Nov 8, 2010 | 03:14 AM
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i had the same problem on my s class. if i remember correctly its the shields on the converter that become rusted or the screwes that hold it down become lose. it wasnt very expensive to ix..is the sound like a chain ratteling?kinda?

Last edited by fusion2007; Nov 8, 2010 at 03:18 AM.
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Old Nov 8, 2010 | 11:02 AM
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Originally Posted by dynomite05
It's probably a primary, you might not even have secondary.
Originally Posted by fusion2007
i had the same problem on my s class. if i remember correctly its the shields on the converter that become rusted or the screwes that hold it down become lose. it wasnt very expensive to ix..is the sound like a chain ratteling?kinda?
I went to a muffler shop this morning. He explained me about the primary and secondary cats. The secondary were the ones rattling. He removed those and welded new pipes. He said there is no sensor at the secondary cats so the check engine light wont be a problem. $100 and its fixed.
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Old Nov 8, 2010 | 11:05 AM
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Thank you all for your replies.
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Old Nov 8, 2010 | 11:25 AM
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Good stuff, all fixed up for 100 bux and a bit better exhaust note to boot. You my friend are having a good day!
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Old Nov 8, 2010 | 11:26 AM
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Good to hear it's taken care of, and you didn't pay an arm and a leg.
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Old Nov 8, 2010 | 11:44 AM
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yep there is no sensors on the secondary cats .

Andy
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