Cheap Mercedes-Benz CLS Catalytic Converter

The CLS is broadly split into the first generation (C219, 2004–2010) and the second generation (C218, 2011–2018), and these are entirely different platforms with different exhaust systems, so a cat from a C219 will not fit a C218. Even within each generation, the correct cat depends on your specific engine code, so always match on that rather than year alone. Confirm the exact part interchange with the breaker against your registration before buying.

Yes, all petrol-engined CLS variants have a catalytic converter as part of the exhaust emissions system, and diesel CLS models also have a catalytic converter alongside a diesel particulate filter (DPF). The CLS has been available with both petrol and diesel engines across its generations, so the cat is a genuine and common part on this model. Which type you need depends on your fuel type and engine code.

Yes, engine code is one of the most important factors — different engines (for example the 3.0-litre diesel OM642 versus the 3.5-litre petrol M272) have different exhaust configurations and different cats. Year matters too because emissions legislation changed between generations, and a cat from the wrong Euro emissions era may not pass an MOT even if it physically fits. Always give the breaker your registration number so they can match the engine code precisely.

No — the CLS 350 is a petrol model and the CLS 250 CDI is a diesel, and petrol and diesel catalytic converters are completely different parts that are not interchangeable. Beyond fuel type, each has its own engine code and exhaust layout, so there is no crossover between them. Always specify your fuel type and engine code when asking a breaker for a quote.

No — trim level (for example Sport, AMG Line, or BlueEFFICIENCY) does not affect which catalytic converter is fitted; what matters is the engine code, fuel type, and the emissions standard applicable to your vehicle's year. You may find visual differences in other exhaust components depending on trim, but the cat itself follows the engine and emissions rules. Confirm the exact part with the breaker using your registration to be safe.

The C218 received a facelift in 2014, and while the engine range broadly carried over, emissions calibration and exhaust specification can differ around this boundary — particularly as Euro 6 requirements came into force during this period. A cat from the wrong emissions era could cause an MOT failure even if it bolts on. Because catalytic converter interchange across this boundary is complex, this is strong confirm-with-the-breaker territory — always check against your specific registration before purchasing.