2014 e550 gutted cats.
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Joined: Jun 2020
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2011 Mercedes E550 coupe
2014 e550 gutted cats.
I have a 2014 e550 4matic. I want to gut the primary catalytic convertes. Will it throw a check engine light? Will it run good without a tune?my main concern is a check engine light and if it would run too rich or lean. I would only be running without a tune for less than a month.
Super Member
Joined: Aug 2004
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E550 Coupe 2wd (2016)
Yes it will give you a CEL. The second O2 won't like it, nor will the 3rd if you have three. A/F is determined by the first sensor, before the cat, so you're good there.
I'd imagine it won't run any different, but only one way to find out.
I'd imagine it won't run any different, but only one way to find out.
Super Member
Joined: Sep 2018
Posts: 961
Likes: 103
10-second E550
Since you can't undo this, please consider using aftermarket downpipes and keeping your stock ones intact in case you ever want to reinstall. If you do choose to gut them, you can sell the material.
But either way, you'll need to tune out the DTCs for downstream O2 sensors. Or use the elbow fittings, but they're hit or miss.
But either way, you'll need to tune out the DTCs for downstream O2 sensors. Or use the elbow fittings, but they're hit or miss.
