Cheap Mercedes-Benz S-Class Catalytic Converter
Get quotes for a used or replacement Mercedes-Benz S-Class catalytic converter. Genuine second hand parts from UK vehicle dismantlers - free request, breakers with stock reply direct.
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Choosing the right used Mercedes-Benz S-Class catalytic converter
Used catalytic converters vary between vehicles - and whether you call it used, second hand or a replacement, matching the right one matters. These are the details breakers need to match the right part to your car - our request form asks them so you only hear from suppliers with the correct part:
- State whether it's petrol or diesel
- State the engine code if known
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Fitment questions
Does a catalytic converter from a 2010 S-Class fit a 2014 S-Class?
This is a critical boundary to be aware of: the W221 generation ran from 2005 to 2013, while the W222 generation launched in 2013-2014, so a 2010 car is W221 and a 2014 car is W222 — these are entirely different platforms with different exhaust systems and cats. Even within the same generation, engine code and emissions standard (Euro 5 vs Euro 6) must match, and W222 models were built to tighter emissions rules. Confirm the exact engine code and generation against your registration with the breaker before ordering.
Will a catalytic converter from a petrol S-Class fit my diesel S-Class?
No — petrol and diesel catalytic converters are fundamentally different components and are not interchangeable. Diesel S-Class models (such as those with the OM642 or OM656 engine codes) also use a diesel oxidation catalyst as part of a wider exhaust aftertreatment system that typically includes a DPF, whereas petrol models use a conventional three-way cat. Always tell the breaker your exact fuel type and engine code when sourcing either part.
Does the trim level affect which catalytic converter I need — for example, does an S350 need a different cat to an S500?
Yes, but it is the engine that drives the difference, not the trim name itself — the S350 and S500 badges denote different engines (for example a V6 or straight-six versus a V8), each of which has its own exhaust and catalyst specification. Trim level in the sense of interior or equipment grade (AMG Line, SE, etc.) has no bearing on cat fitment whatsoever. Focus on matching the engine code exactly, and confirm the specific part number with the breaker against your registration.
My S-Class is a 2008 W221 — do I need to worry about Euro 4 versus Euro 5 when buying a used catalytic converter?
Yes, the emissions standard the car was built to affects the catalyst specification, and fitting a cat from the wrong emissions era could cause MOT failure or trigger warning lights. The W221 generation spans both Euro 4 and Euro 5 vehicles depending on the model year and engine, so two visually similar cats from the same generation may not be equivalent. Give the breaker your full registration and engine code so they can confirm the correct emissions-era part.
Does the Mercedes S-Class actually have a catalytic converter, or is it only a DPF?
All S-Class variants — both petrol and diesel — are fitted with a catalytic converter as part of their exhaust aftertreatment system; it is not a diesel-only or petrol-only component. Diesel models typically combine a diesel oxidation catalyst with a DPF, while petrol models use a three-way catalytic converter, so the specific type and configuration differs significantly between fuels. Because the exact arrangement and whether individual components can be sourced separately varies by engine and year, confirm precisely which component you need with the breaker using your registration.
Can I use a catalytic converter from a W222 S-Class facelift (2017 onwards) on a pre-facelift W222?
The W222 was facelifted in 2017, and while both pre- and post-facelift cars share the same basic platform, emissions-related updates and changes to engine management at the facelift point mean catalyst specifications may have changed. Interchange across that boundary is strong confirm-with-breaker territory — name the boundary to your breaker (pre-2017 vs 2017-on) and give them your engine code and registration so they can check part numbers directly. Never assume a cat will cross a facelift boundary safely.