Kwiksen 234-4175 Oxygen Sensor Upstream Downstream For Mercedes-Benz S500 SL500 CL500 E320 E430 C230 E55 AMG COMPATIBLE WITH OEM: 234-4175 Length (Sensor to Lead): 650mm. Wires: 4 Meet the professtional specification as OEM parts, for stable performance & durability Warranty: 1 year unlimited miles. Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase.