Mercedes-Benz CLE Catalytic Converter Replacement Parts

Yes, all petrol-engined CLE variants have a catalytic converter as part of the exhaust aftertreatment system, and diesel variants carry a diesel oxidation catalyst (DOC) alongside a diesel particulate filter (DPF). The CLE launched in 2023 as an entirely new model line replacing both the C-Class Coupe and E-Class Coupe, so all examples on UK roads are Euro 6 compliant from new. This means the catalytic converter spec is tied closely to each specific engine code and its emissions calibration.

The CLE range launched in 2023 and, at the time of writing, has not undergone a facelift, so the engine lineup has remained consistent across 2023, 2024, and 2025 model years. However, whether a used cat from one year will physically interchange with another year's car depends on the exact engine code — for example, a CLE 200 uses a different four-cylinder unit to a CLE 450 inline-six, and the exhaust systems differ accordingly. Always confirm the exact engine code against your registration with the breaker before ordering.

No, trim level does not affect catalytic converter fitment on the CLE — AMG Line, AMG Line Premium, and any other trim designation are cosmetic and equipment packages that do not change the engine or exhaust aftertreatment hardware. What matters is your engine code and fuel type, both of which you can confirm from your V5C or by giving the breaker your registration number. You may find cosmetic differences around the exhaust tips or rear valance between trims, but the cat itself is determined by the engine, not the trim.

Both the CLE 300 and CLE 300 4MATIC use the same 2.0-litre four-cylinder petrol engine, so the catalytic converter is likely to be closely related, but whether the exhaust routing and cat mounting positions are identical between the two drivetrain layouts is something you should confirm with the breaker against your specific registration. The addition of 4MATIC all-wheel drive can sometimes alter underbody packaging and exhaust geometry, which may affect compatibility. A good breaker will be able to check the part numbers against your VIN before supplying.

Although the CLE shares platform and engine family roots with the W206 C-Class, the two are distinct body structures with different exhaust routing and mounting points, so a direct swap is unlikely to be straightforward even if the engine codes match. Using an exhaust component from the wrong model could also create MOT issues if the emissions calibration or lambda sensor positions differ. Stick to a cat sourced from a CLE with the matching engine code, and confirm compatibility with the breaker before purchasing.

A used catalytic converter from a CLE of the same engine code and emissions spec can pass an MOT, provided it is not damaged, not excessively aged, and not a pattern part that fails the emissions test — condition matters as much as fitment. Because the CLE is a Euro 6 vehicle, any replacement cat must meet Euro 6 standards; fitting a unit from a different emissions era is a risk both for MOT failure and legal compliance. Confirm with the breaker that the unit comes from a matching engine code and was not removed due to an emissions-related fault.