C218 CLS63, 2011 - 2019

Detune M157 in 2016 CLS63S to meet Euro 6C standard

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Old Jul 13, 2022 | 11:06 PM
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AndyM157's Avatar
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CLS63S AMG Shooting Brake
Detune M157 in 2016 CLS63S to meet Euro 6C standard

I have asked this on UK-based MB Club forum, and I'm hoping to see what expert advice I can find State-side.

I am trying to find a way to detune the M157, which is already compliant with the original Euro 6 emissions standard, to meet the more stringent Euro 6C NOx requirements in preparation for export to Hong Kong (which follows the Euro 6 emissions standard). Of course, I know this will impact both performance and drivability, but that bridge can be crossed once the car is successfully imported to HK!

I would be very grateful for recommendations on M157 tuning experts, either someone who has proven track record in re-programming the ECUs specifically to meet emissions requirements, or a combination of software changes and additional / replacement filtering hardware in the exhaust system to get NOx levels below the Euro 6C limits.
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Old Oct 6, 2022 | 02:12 PM
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add two GPF filters in like the newer gen cars . Replace the resonators with these. will look stock, and will still be quiet.
if you get someone to do you a bespoke map, they'll be able to measure your emmisions and try to pass it. I'm sure you'll have no bother!

Let us know how you get on
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