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1999 CL500 Black\Black 1988 420 SEL 80K 1993 600SEL 48K Black/Black
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41 Posts
Discussion Starter #1
I got 99 Cl500 and its my DD. I want to get rid of my catalytic converters. Question: If I remove them, how can I fool O2 sensors after cat? I dont need to pass any inspections, but dont want to see check engine light. Thanks
 

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1999 CL500 Black\Black 1988 420 SEL 80K 1993 600SEL 48K Black/Black
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41 Posts
Discussion Starter #5
you can remove the rear cats and it wont set off any codes.
Im getting rid off pre cats too, because im gonna get fully custom stainless steel exhaust all the way to the back
 

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1997 S500V, 1999 S500 grand edition, 2006 s65 amg
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7,356 Posts
Im getting rid off pre cats too, because im gonna get fully custom stainless steel exhaust all the way to the back
would you want to send you drivers side pre cat here :) lol i need to pass emissions and my factory doesnt pass. but honestly i would leave the pre cats because your gonna need to disable the o2 sensors
 

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99CL600,98CL600 Swiss import,R230 SL666, EURO1985 280 CE & XR600R Desert killer
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915 Posts
Hi 100NX I was thinking about that too even custom headers and full SS system and no cats at all on my V12 but I know if I do that then I will get warning lights on the dash so if you figure it out keep US posted and good luck with yours!
 

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1999 CL500 Black\Black 1988 420 SEL 80K 1993 600SEL 48K Black/Black
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41 Posts
Discussion Starter #8
Hi 100NX I was thinking about that too even custom headers and full SS system and no cats at all on my V12 but I know if I do that then I will get warning lights on the dash so if you figure it out keep US posted and good luck with yours!
Thanks. I will keep you posted...
 

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1999 CL500 Black\Black 1988 420 SEL 80K 1993 600SEL 48K Black/Black
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41 Posts
Discussion Starter #9
would you want to send you drivers side pre cat here :) lol i need to pass emissions and my factory doesnt pass. but honestly i would leave the pre cats because your gonna need to disable the o2 sensors
Im gonna save my full stock exhaust and dont really want to cut it in pieces. I dont want to keep pre cats becaouse I dont need that crap on my car. Im a dealer so im driving on dealer plate all the time and not gonna pass inspection ever.
 

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1995 mercedes S420
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228 Posts
i did cut mine. im drivin with no cat.but since i cut the cat and put straight pipes i feel the car is fast ,but not good on gas like it was
 

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1999 CL500 Black\Black 1988 420 SEL 80K 1993 600SEL 48K Black/Black
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41 Posts
Discussion Starter #12
i did cut mine. im drivin with no cat.but since i cut the cat and put straight pipes i feel the car is fast ,but not good on gas like it was
Thanks for video man, but im getting rid of them not because I have a problem with catalytic convertors. I dont need that crap on my car, im not trying to get more power or something. I love my car and im trying to drive it as much as possible.
For other members: IF SOMEONE NEEDS ANY HELP WITH ANY PROBLEMS ON THEIR W140 LET ME KNOW. Im working on my cars by myself and I went thru everything on them
 
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