Mercedes Benz Catalytic Converters - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 11-12-2008, 08:57 AM Thread Starter
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Smile Mercedes Benz Catalytic Converters

This is new member Lene. I just discovered your site, which is great. I have a 1999 MB E430. It has a little over 100,000 miles on it, but it is a pretty good car. The car shop I use (not a dealer) told me that one of my catalytic converters needed to be replaced & would cost about $1,000 (I'm sure with labor it would be more) It sometimes rattles under the passenger's side while traveling on the freeway. I want a second opinion. Is that cost about right? I read something about not replacing O2 sensors or about using aftermarket catalytic converters for less money. Is that the best to do? If so, does anyone know of a good mechanic that would not charge as much in the San Fernando Valley area in California? (near Woodland Hills, or other adjoining close cities) Thank you.
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post #2 of 2 (permalink) Old 11-12-2008, 09:51 AM
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Hi, Lene, and welcome to the forum. Please take a minute to click the user cp link and complete your BW profile to include vehicle and location information as that is quite useful.

If you scroll down into the sedans section, you'll see a sub-forum for the W210, which is specific for your car. There you'll find a wealth of information on lots and lots of topics about the 210. A bunch of great help/DIY stickies and the search function will yield still more.

Re: cats, I just went through the same thing. The stock cats were junk, MB extended the warranty period for AMG models, but the rest of us are left to twist in the wind. Since you're in CA you have only two choices: go to an exhaust shop and have them weld in an aftermarket cat that meets CARB/OBD-II specs or buy the oem components from the dealer. I ordered mine online from and bolted them in last Friday. The reason they are so expensive is that you actually have four cats, 2 on each bank, so when you buy from the dealer you're getting two cats as well as the stringer pipes, etc (replaces everything from the exhaust manifold to the resonator). 100K is also the suggested interval for O2 sensor replacement, although if yours are okay (no CEL, no codes, no loss of fuel economy) you can stretch that.

Anyway, more to come down in the 210 forum and we'll look for you there.

Take care and enjoy the ride,

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
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