[INNOVATIVE TECHNOLOGY] - Every Bosch Oxygen Sensor benefits from the technological and manufacturing experience gained from decades of production since first inventing the Oxygen Sensor in the late 1960's, ensuring long-lasting performance [FACTORY TESTED] - Seared appearance of protection tube is a result of a 100 percent fully functional quality test to ensure every Bosch manufactured sensor meets Bosch's rigorous standards for quality and performance [STAINLESS STEEL BODY] - Exclusive double laser-welded stainless steel body is totally submersible and sealed tight to protect against damage from exhaust emissions - ensuring longer sensor service life [FAST ACTING HEATER] - Fast-acting heater optimizes sensor operation on Planar and 3, 4, and 5 wire Thimble type sensors allowing the oxygen sensor to reach its operating temperature quicker - within seconds - for optimum performance [READY TO INSTALL] - True Direct-fit OE connectors and harnesses, along with threads pre-coated with anti-seize compound right out of the box, make installation simple and easy Compatible with select vehicles (Note: engine may affect fitment - verify specific fitment details, including sensor position, with fit checker above): MERCEDES-BENZ: 2008-09 C230, 2010-12 C250, 2008-12 C300, 2008-11 C350, 2007-10 CL550 Compatible with (continued): MERCEDES-BENZ: 2008-10 CL63 AMG, 2007-11 CLS63 AMG, 2010-11 E350, 2010-11 E550, 2007-11 E63 AMG, 2010-12 GLK350, 2007-12 GL450, 2008-12 GL550, 2006-11 ML350, 2008-11 ML550, 2007-11 ML63 AMG Compatible with (continued): MERCEDES-BENZ: 2006-11 R350, 2007 R63 AMG, 2008-11 S450, 2007-11 S550, 2008-10 S63 AMG