2011-2017 Mercedes-Benz O2 / Oxygen Sensor (POST CAT) Left, Rear, Right 0085427818
OEM Part #: 008-542-78-18 (0085427818)
Actual photo
The exact part you’ll receive — not a stock photo.
$42.49
Side: Left, Rear, Right
Used
Donor2012 Mercedes-Benz S550 · 4.6L
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Genuine OEM Used
SKU: 682312
Donor Vehicle: 2012 Mercedes-Benz S550 · 4.6L
2 photos
$42.49
30-Day Returns
Genuine OEM Used
SKU: 682316
Donor Vehicle: 2012 Mercedes-Benz S550 · 4.6L
2 photos
$42.49
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
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A used genuine OEM Mercedes-Benz O2 / Oxygen Sensor (post Cat), part number 0085427818, also known as a post-catalyst oxygen sensor. This sensor monitors exhaust oxygen levels after the catalytic converter, helping the engine control unit adjust the air-fuel mixture. A failing unit typically triggers a check engine light and may cause poor fuel economy or an emissions test failure. This specific sensor is for Left, Rear, or Right placement on select Mercedes models with 4.7L, 5.5L, 6.0L, or 6.3L engines.
Specifications
| Fits Vehicle Model | CL550, CL63 AMG, Maybach S550, S550, S63 AMG |
| Fits Vehicle Make | Mercedes-Benz |
| OEM Part No | 008-542-78-18 (0085427818) |
| Side | Left, Rear, Right |
| Category | Sensors |
Compatible Vehicles
Fits 25 vehicle configurations across 1 make, 2011-2017.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 25 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2017 | Mercedes-Benz | S550 | Coupe | 4.7L V8 Turbo | |
| 2011 | Mercedes-Benz | CL550 | Coupe | 4.7L V8 Turbo | |
| 2011 | Mercedes-Benz | CL63 AMG | Coupe | 5.5L V8 Turbo | |
| 2012 | Mercedes-Benz | CL550 | Coupe | 4.7L V8 Turbo | |
| 2012 | Mercedes-Benz | CL63 AMG | Coupe | 5.5L V8 Turbo | |
| 2013 | Mercedes-Benz | CL550 | Coupe | 4.7L V8 Turbo | |
| 2013 | Mercedes-Benz | CL63 AMG | Coupe | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2014 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2015 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2015 | Mercedes-Benz | S550 | Coupe | 4.7L V8 Turbo | |
| 2016 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2016 | Mercedes-Benz | S550 | Coupe | 4.7L V8 Turbo | |
| 2017 | Mercedes-Benz | Maybach S550 | Sedan | 4.7L V8 Turbo | |
| 2014 | Mercedes-Benz | CL550 | Coupe | 4.7L V8 Turbo | |
| 2012 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2013 | Mercedes-Benz | S550 | Sedan | 4.7L V8 Turbo | |
| 2014 | Mercedes-Benz | S63 AMG | Sedan | 5.5L V8 Turbo | |
| 2015 | Mercedes-Benz | S63 AMG | Coupe | 5.5L V8 Turbo | |
| 2015 | Mercedes-Benz | S63 AMG | Sedan | 5.5L V8 Turbo | |
| 2016 | Mercedes-Benz | S63 AMG | Coupe | 5.5L V8 Turbo | |
| 2016 | Mercedes-Benz | S63 AMG | Sedan | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | S63 AMG | Convertible | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | S63 AMG | Coupe | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | S63 AMG | Sedan | 5.5L V8 Turbo |