Description Please check fitment notes & description for accurate information. Brand New Oxygen Sensor Interchange Part Number: 234-4895 Direct Plug-In Replacement Wires: 4 Length: 463mm/18.2 inch Warranty: One year unlimited miles. Fits Vehicle: 2000-2006 Mercedes-Benz CL500 5.0L Upstream 2001-2006 Mercedes-Benz CL55 AMG 5.5L Upstream 2001-2002 Mercedes-Benz E320 3.2L Upstream Left2001-2002 Mercedes-Benz E430 4.3L Upstream Left 2002 Mercedes-Benz E55 AMG 5.5L Upstream Left 2001-2006 Mercedes-Benz S430 4.3L Upstream2001-2006 Mercedes-Benz S500 5.0L Upstream2001-2006 Mercedes-Benz S55 AMG 5.5L Upstream 2005-2009 Mercedes-Benz SLR McLaren 5.5L Upstream Package Includes: 1pc x Upstream Oxygen Sensor Must Know Before Buying: The following information is for instructional and guidance reference only. We try and make them as accurate as we can. If Check Engine Light is on or an OBDII Trouble/Fault code occurs after installation, check the sensor with a voltmeter as below. If the sensor is good, further diagnosis is required. There're many different codes for specific functional failures, which are NOT necessarily relevant to the sensor. Find out what the Code means before leaving any responses. Items that have been installed, altered or contaminated are non- returnable. ONLY a defective sensor after tested by a voltmeter is applied to manufacturer warranty. 20% restocking fee is required if buyer bought wrong items due to not paying attention to fitment information and ask for return. The Price, Quality & Funcitonality of the O2 Sensor is fully covered under our warranty & return policy. However, refund for any labor cost, expense in a dealer shop or damage due to wrong installation is NOT covered. Q: How do I know the O2 sensor is good or not? (Online Video) A: The only way to know if the O2 sensor is functioning normally is to check its responsiveness to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation. Use a 10-megaohm digital voltmeter. Hook up the voltmeter's red probe to the sensor's signal wire and the black probe to engine ground. (Use back probe method, DO NOT pierce the wire.) For a good sensor, voltage should fluctuate constantly between 0.1 and 0.9 volts after starting the engine for 2 or 3 minutes. Please take a video clip of the voltmeter and contact us if our sensor: Goes above range between 0.1 and 0.9 volt Remains below 0.5 volts Stays fixed at a particular voltage You're free to choose replacement or refund if our sensor fails to work, in this case. Fast Shipping All the orders are shipped form USA warehouse. Orders will ship within 24 hours, all orders placed before 1 PM (Monday~Friday) will be shipped on the same day. We cannot control the post after the package is shipped out. The item usually arrives within 1-5 days excludes weekends and holidays. Warranty Your satisfaction is guarranteed, we take pride in providing quality product and good service to all our customers at a competitive price. We will not refund any labor costs in incurred by you or the installer of the products purchased from us. Hassle Free Returns If you are not satisfied when you receive your item, please return it within 30 days for a replacement or money back. Return shipping fee is applied to buyers, unless product is defective or damaged. We will charge 20% restocking fee of paid price if the return is due to buyer's mistake.