Mercedes-Benz S-Class W126 Catalytic Converter
New, used, or aftermarket – from sellers across Europe.
Parts availability
This part appears to be widely available.
Estimated price range
Widely available Limited Hard to find
Last updated: 22.08.2026, 05:08
Catalytic Converter for your Mercedes-Benz S-Class?
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Prices from recent listings
| Source | Condition | Price (approx.) | Last seen |
|---|---|---|---|
| Motordoctor | Unknown | 116.34 € | 2026-08-22 |
| Motordoctor | Unknown | 127.13 € | 2026-08-22 |
| Motordoctor | Unknown | 148.02 € | 2026-08-22 |
| Motordoctor | Unknown | 163.41 € | 2026-08-22 |
| Motordoctor | Unknown | 167.03 € | 2026-08-22 |
| Motordoctor | Unknown | 183.65 € | 2026-08-22 |
| Motordoctor | Unknown | 212.68 € | 2026-08-22 |
| Pkwteile | New | 228.68 € | 2026-08-22 |
Indicative values only – current prices may vary.
Price comparison: Catalytic Converter
Current median for the Mercedes-Benz S-Class W126: 344.99 €.
Median across all car models: around 360 €. This model is 5% below that and cheaper than 50% of the models compared.
Median across Mercedes-Benz car models: around 440 €. This model is 20% below that and cheaper than 65% of the models compared.
Compares the medians of the most recent offers found for each model.
Find Mercedes-Benz S-Class W126 parts online
hank's free AI report searches specialized shops for Mercedes-Benz S-Class W126 parts, including Cannstatt Classic Mercedes Parts, Dronsfields & LLLParts.
About this part
The catalytic converter on your S-Class W126 converts the pollutants in the exhaust and decides whether the emissions test passes. Rattling when pulling away, a loss of power from blocked ceramic or a lambda control fault all call for replacement.
Frequently asked questions
What should I check when buying a catalytic converter for the Mercedes-Benz S-Class?
Emissions standard, engine code and flange dimensions of your S-Class W126 matter, because a converter for the wrong standard never brings the sensors into their control range. Look for a valid approval number on the housing and check that the lambda sensor bosses and heat shield are there.
A used original converter or an aftermarket one?
A used original fits without surprises and keeps the vehicle's approval, but tap it first to hear whether the ceramic has come loose. Aftermarket converters cost less yet need the matching approval, otherwise the roadworthiness test turns into a problem.
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