Bosch OE Fine Wire Double Platinum Spark Plugs feature a platinum firing pin and ground electrode inlay that provide 3X longer service life compared to standard copper plugs Unique 360 degree, continuous laser welded fine wire platinum firing pin design delivers better corrosion resistance, ignitability, and performance Nickel-plated rolled threads provide exceptional resistance to corrosion and do not require anti-seize - making installation quick and easy Bosch OE Fine Wire Double Platinum spark plugs are pre-gapped at the factory and ready to install right out of the box - gap adjustment prior to installation not required Meets or exceeds OE manufacturer design requirements for fit, form, and function for modern gasoline engines Compatible with select vehicles including, but not limited to, the following (Note: engine affects fitment - verify specific fitment details with fit checker above): CHRYSLER: 2004-08 Crossfire; MERCEDES-BENZ: 1998-05 CLK320, 1999-03 CLK430 Compatible with (continued): MERCEDES-BENZ: 2003-06 CLK500, 2001-02 CLK55 AMG, 2006 CLS500, 1998-06 CL500, 2001-02 CL55 AMG, 2001-05 C240, 1998-00 C280, 2001-05 C320, 1998-00 C43 AMG, 1998-05 E320, 1998-02 E430, 2003-06 E500, 1999-02 E55 AMG Compatible with (continued): MERCEDES-BENZ: 2002-08 G500, 2003-04 G55 AMG, 1998-03 ML320, 2003-05 ML350, 1999-01 ML430, 2002-07 ML500, 2000-03 ML55 AMG, 2006-07 R500, 2001-04 SLK320, 2005 SLK55 AMG, 1998-06 SL500, 1996-98 SL600, 2006 S350 Compatible with (continued): MERCEDES-BENZ: 1998-99 S420, 2000-06 S430, 1998-06 S500, 2001-02 S55 AMG, 1994-99 S600; TOYOTA: 1986-89 Celica, 1985-89 Corolla, 1989-92 Cressida, 1985-89 MR2, 1986-92 Supra