E-Class (W211) 2003-2009

E500 Universal Cat Converter

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Old 10-08-2012, 04:56 PM
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Mercedes E500
E500 Universal Cat Converter

A few years ago, I experienced the problem of radiator fluid leaking into the my E500's tranny and the dealer did not want to honor the TSB from the factory and demanded $7K. I posted a plea for help and Konigsteiger really helped me out. Ever since, I promised myself that I will reapy the community back. So here goes:

Recently, one of the catalytic converters on my 2003 E500 went bad and started to make noise. MB part number is 211-4900919. I found pricing around $1200 for MB parts which included the pipes, etc.

I found a universal Cat converter and just had it installed. The mechanic said that the fit was great and all worked out. The price of the unit was $113 plus shipping and I bought it from www.carid.com.

Plesae note that to do this, the old Cat has to be cut out and the universal unit has to be welded in its place.

FLOWMASTER® 2830124 - 283 Series Stainless Steel OBDII Round Catalytic Converter (2.25" Inlet / 2.25" Outlet)

Hope this helps anyone else needing a cat converter.
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Old 10-15-2012, 12:52 PM
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E500 AMG Sport
Hi friend..... Is this for a rear cat or a front cat? And how has the car been runnin since? Any problems? Performance issues? Etc?
Old 10-15-2012, 04:45 PM
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Mercedes E500
Not sure what you mean by front vs. rear...My E500 has two cats, right and left. It has been running fine and I have not felt any performance issues.
Old 10-15-2012, 06:24 PM
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E500 AMG Sport
Originally Posted by fdk110
Not sure what you mean by front vs. rear...My E500 has two cats, right and left. It has been running fine and I have not felt any performance issues.
There are two cats on each side of the car for a e500... At least for an 03... 2 sensored ones towards the front... and 2 towards the back... kinda in the middle... My drivers side rear one is rattling(without sensor)... Wondering which ones you replaced.

http://www.car-stuff.com/2003mercede...cconverter.htm
Old 10-15-2012, 10:30 PM
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06 S211 E500 4Matic
If your rears are rattling then don't replace them. Simply cut them out and enjoy a slight performance boost. Not sure what they do pollution-wise, but if your state does not use that sniffing hose, you should be OK as cutting the rear cats will not throw a CEL.

And yes, there are 2 cats on each side, so a total of 4. 2 closer to the engine and 2 towards the middle of the car which you can actually see quite easily

Last edited by 06E5004ME; 10-15-2012 at 10:33 PM.
Old 10-16-2012, 12:18 AM
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E500 AMG Sport
Originally Posted by 06E5004ME
If your rears are rattling then don't replace them. Simply cut them out and enjoy a slight performance boost. Not sure what they do pollution-wise, but if your state does not use that sniffing hose, you should be OK as cutting the rear cats will not throw a CEL.

And yes, there are 2 cats on each side, so a total of 4. 2 closer to the engine and 2 towards the middle of the car which you can actually see quite easily
I don't know anyone who will do that around here though... Illegal in this area... I already asked 3 different local mechanics... I can't weld anyway... lol
Old 10-18-2012, 03:27 PM
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Mercedes E500
Originally Posted by Nikolaos44
There are two cats on each side of the car for a e500... At least for an 03... 2 sensored ones towards the front... and 2 towards the back... kinda in the middle... My drivers side rear one is rattling(without sensor)... Wondering which ones you replaced.

http://www.car-stuff.com/2003mercede...cconverter.htm
Must be the one on the back side as the one I replaced did not have a sensor.

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