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Discussion Starter #1
I have a rattle in my driver side Cat. Went to the local mech and he quoted me $1500,
went to my dealer and he is actually just a touch cheaper. The question is : should I replace with OEM or take the car to a muffler shop, 2002 E-320 4 matic with 113k mi.
The local mechanic told me that he recommended Mercedes because the other products would cause constant error code messages.
Input?
Thanks,
Sandman152
 

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It's too bad it you didn't have less than 80k miles, or it would have been covered under warranty. I would suggest getting it from your dealer, especially if it's cheaper. I've never seen the same set of cats been replaced on one vehicle twice, so you should be safe with that.
 

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I've replaced both of the cats on my 200 E430 with aftermarket units and have had no problems whatsoever. I pass Massachusetts inspections, and the cats were significantly less expensive than OEM, only around $400 each plus labor.
 
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