Gates 31540 Radiator Cap

OE Type Radiator Cap for Mercedes-Benz Cooling Systems

The Gates 31540 OE Type Radiator Cap is built for Mercedes-Benz cooling systems that require a threaded coolant bottle cap with a 21 psi pressure rating. It is engineered to match OEM specifications in function, form, and fit, helping maintain proper system pressure in a closed coolant recovery setup.

• OE Type Radiator Cap for threaded coolant bottle applications
• 21 psi pressure rating with SAE pressure range of 18-22 psi
• Closed-system coolant recovery design
• Corrosion-resistant heavy-gauge metal or high-quality plastic construction, depending on application
• OE performance comparison rating for factory-style operation
• Gates part number 31540

Built to Match Factory Cooling Specs

Gates OE Type Radiator Cap 31540 is designed for vehicles that depend on accurate pressure control to support stable cooling-system operation. With a filler neck inside diameter of 1.64 in. (42 mm), filler neck outside diameter of 2.75 in. (70 mm), and cap depth of 1.18 in. (30 mm), this threaded coolant bottle cap is sized for the specified Mercedes-Benz applications. The Gates 31540 is a direct-fit style replacement for many Mercedes-Benz C300, E350, GLC300, Sprinter, GLE, GLS, S-Class, AMG, and other models listed below.

This part cross-references Dorman - HELP 46071 and Carlson 7050 for the same application.

Vehicle Fitment

• Fits 2008-2023 Mercedes-Benz C300, N/A
• Fits 2016-2023 Mercedes-Benz GLC300, N/A
• Fits 2017-2023 Mercedes-Benz GLS450, N/A
• Fits 2019-2023 Mercedes-Benz Sprinter 2500, N/A
• Fits 2020-2023 Mercedes-Benz Sprinter 3500, N/A
• Fits 2020-2023 Mercedes-Benz Sprinter 3500XD, N/A
• Fits 2017-2022 Mercedes-Benz C43 AMG, N/A
• Fits 2000 Mercedes-Benz C43 AMG, N/A
• Fits 2022 Mercedes-Benz E53 AMG, N/A
• Fits 2012-2022 Mercedes-Benz G550, N/A
• Fits 2009-2010 Mercedes-Benz G550, N/A
• Fits 2022 Mercedes-Benz GLB35 AMG, N/A
• Fits 2022 Mercedes-Benz GLC43 AMG, N/A
• Fits 2017-2020 Mercedes-Benz GLC43 AMG, N/A
• Fits 2016-2022 Mercedes-Benz Metris, N/A
• Fits 2022 Mercedes-Benz S500, N/A
• Fits 1998-2006 Mercedes-Benz S500, N/A
• Fits 2022 Mercedes-Benz Sprinter, N/A
• Fits 2019-2022 Mercedes-Benz Sprinter 1500, N/A
• Fits 2020-2021 Mercedes-Benz E350, N/A
• Fits 2006-2016 Mercedes-Benz E350, N/A
• Fits 2015-2021 Mercedes-Benz GLA250, N/A
• Fits 2021 Mercedes-Benz GLE53 AMG, N/A
• Fits 2021 Mercedes-Benz GLE53 AMG SUV, N/A
• Fits 2021 Mercedes-Benz GLE63 AMG S, N/A
• Fits 2016-2019 Mercedes-Benz GLE63 AMG S, N/A
• Fits 2020-2021 Mercedes-Benz GLS580, N/A
• Fits 2018-2021 Mercedes-Benz S560, N/A
• Fits 2019-2020 Mercedes-Benz A220, N/A
• Fits 2018-2020 Mercedes-Benz AMG GT, N/A
• Fits 2019-2020 Mercedes-Benz AMG GT 63, N/A
• Fits 2019-2020 Mercedes-Benz AMG GT 63 S, N/A
• Fits 2018-2020 Mercedes-Benz AMG GT C, N/A
• Fits 2018-2020 Mercedes-Benz AMG GT R, N/A
• Fits 2020 Mercedes-Benz AMG GT R Pro, N/A
• Fits 2018-2020 Mercedes-Benz AMG GT S, N/A
• Fits 2014-2020 Mercedes-Benz CLA250, N/A
• Fits 2019-2020 Mercedes-Benz CLS450, N/A
• Fits 2019-2020 Mercedes-Benz E450, N/A
• Fits 2020 Mercedes-Benz E63 AMG, N/A
• Fits 2015-2016 Mercedes-Benz E63 AMG, N/A
• Fits 2007-2013 Mercedes-Benz E63 AMG, N/A
• Fits 2018-2020 Mercedes-Benz E63 AMG S, N/A
• Fits 2015-2016 Mercedes-Benz E63 AMG S, N/A
• Fits 2013-2020 Mercedes-Benz G63 AMG, N/A
• Fits 2018-2020 Mercedes-Benz GLC350e, N/A
• Fits 2020 Mercedes-Benz GLE350, N/A
• Fits 2016-2018 Mercedes-Benz GLE350, N/A
• Fits 2020 Mercedes-Benz GLE450, N/A
• Fits 2020 Mercedes-Benz GLE580, N/A
• Fits 2018-2020 Mercedes-Benz Maybach S560, N/A
• Fits 2020 Mercedes-Benz Maybach S650, N/A
• Fits 2018 Mercedes-Benz Maybach S650, N/A
• Fits 2018-2020 Mercedes-Benz S450, N/A
• Fits 2008-2011 Mercedes-Benz S450, N/A
• Fits 2019-2020 Mercedes-Benz S450L, N/A
• Fits 2014-2019 Mercedes-Benz CLA45 AMG, N/A
• Fits 2016-2019 Mercedes-Benz E300, N/A
• Fits 2008 Mercedes-Benz E300, N/A
• Fits 1999 Mercedes-Benz E300, N/A
• Fits 1996-1997 Mercedes-Benz E300, N/A
• Fits 2019 Mercedes-Benz E53 AMG, N/A
• Fits 2019 Mercedes-Benz GLA45 AMG, N/A
• Fits 2015-2017 Mercedes-Benz GLA45 AMG, N/A
• Fits 2019 Mercedes-Benz GLE400, N/A
• Fits 2016-2017 Mercedes-Benz GLE400, N/A
• Fits 2017-2019 Mercedes-Benz GLE43 AMG, N/A
• Fits 2016-2019 Mercedes-Benz GLE63 AMG, N/A
• Fits 2017-2019 Mercedes-Benz GLS63 AMG, N/A
• Fits 2019 Mercedes-Benz S560L, N/A
• Fits 2011-2019 Mercedes-Benz SL63 AMG, N/A
• Fits 2009 Mercedes-Benz SL63 AMG, N/A
• Fits 2018 Mercedes-Benz C350e, N/A
• Fits 2016-2018 Mercedes-Benz C63 AMG, N/A
• Fits 2008-2014 Mercedes-Benz C63 AMG, N/A
• Fits 2015-2018 Mercedes-Benz C63 AMG S, N/A
• Fits 2007-2018 Mercedes-Benz CLS550, N/A
• Fits 2014-2018 Mercedes-Benz CLS63 AMG S, N/A
• Fits 2015-2018 Mercedes-Benz E400, N/A
• Fits 2017-2018 Mercedes-Benz E43 AMG, N/A
• Fits 2017-2018 Mercedes-Benz G550 4x4, N/A
• Fits 2017-2018 Mercedes-Benz GLS550, N/A
• Fits 2017-2018 Mercedes-Benz SL450, N/A
• Fits 2011-2018 Mercedes-Benz SL550, N/A
• Fits 2007-2009 Mercedes-Benz SL550, N/A
• Fits 2017-2018 Mercedes-Benz SLC300, N/A
• Fits 2017-2018 Mercedes-Benz SLC43 AMG, N/A
• Fits 2015-2017 Mercedes-Benz CLS400, N/A
• Fits 2007-2017 Mercedes-Benz E550, N/A
• Fits 2017 Mercedes-Benz GLS350d, N/A
• Fits 2016-2017 Mercedes-Benz Maybach S600, N/A
• Fits 2015-2017 Mercedes-Benz S600, N/A
• Fits 2001-2012 Mercedes-Benz S600, N/A
• Fits 2016-2017 Mercedes-Benz S600L, N/A
• Fits 2008-2017 Mercedes-Benz S63 AMG, N/A
• Fits 2016-2017 Mercedes-Benz S63L AMG, N/A
• Fits 2013-2017 Mercedes-Benz SL65 AMG, N/A
• Fits 2011 Mercedes-Benz SL65 AMG, N/A
• Fits 2005-2009 Mercedes-Benz SL65 AMG, N/A
• Fits 2016 Mercedes-Benz C450 AMG, N/A
• Fits 2014-2016 Mercedes-Benz E250, N/A
• Fits 2010-2016 Mercedes-Benz GL350, N/A
• Fits 2007-2016 Mercedes-Benz GL450, N/A
• Fits 2008-2016 Mercedes-Benz GL550, N/A
• Fits 2013-2016 Mercedes-Benz GL63 AMG, N/A
• Fits 2016 Mercedes-Benz GLE300d, N/A
• Fits 2016 Mercedes-Benz GLE450 AMG, N/A
• Fits 2007-2016 Mercedes-Benz S550, N/A
• Fits 2015-2016 Mercedes-Benz S65 AMG, N/A
• Fits 2006-2011 Mercedes-Benz S65 AMG, N/A
• Fits 2016 Mercedes-Benz S65L AMG, N/A
• Fits 2015-2016 Mercedes-Benz SL400, N/A
• Fits 2005-2016 Mercedes-Benz SLK350, N/A
• Fits 2012-2016 Mercedes-Benz SLK55 AMG, N/A
• Fits 2005-2010 Mercedes-Benz SLK55 AMG, N/A
• Fits 2011-2015 Mercedes-Benz C250, N/A
• Fits 2006-2015 Mercedes-Benz C350, N/A
• Fits 2015 Mercedes-Benz C400, N/A
• Fits 2013-2015 Mercedes-Benz GLK250, N/A
• Fits 2010-2015 Mercedes-Benz GLK350, N/A
• Fits 2015 Mercedes-Benz ML250, N/A
• Fits 2006-2015 Mercedes-Benz ML350, N/A
• Fits 2015 Mercedes-Benz ML400, N/A
• Fits 2013-2015 Mercedes-Benz ML550, N/A
• Fits 2008-2011 Mercedes-Benz ML550, N/A
• Fits 2012-2015 Mercedes-Benz ML63 AMG, N/A
• Fits 2007-2010 Mercedes-Benz ML63 AMG, N/A
• Fits 2012-2015 Mercedes-Benz SLK250, N/A
• Fits 2012-2015 Mercedes-Benz SLS AMG, N/A
• Fits 2007-2014 Mercedes-Benz CL550, N/A
• Fits 2008-2014 Mercedes-Benz CL63 AMG, N/A
• Fits 2007-2014 Mercedes-Benz CLS63 AMG, N/A
• Fits 2013 Mercedes-Benz A180, N/A
• Fits 2013 Mercedes-Benz C180, N/A
• Fits 2012-2013 Mercedes-Benz S350, N/A
• Fits 2006 Mercedes-Benz S350, N/A
• Fits 2001-2012 Mercedes-Benz CL600, N/A
• Fits 1998-1999 Mercedes-Benz CL600, N/A
• Fits 2006-2012 Mercedes-Benz R350, N/A
• Fits 2008-2011 Mercedes-Benz CL65 AMG, N/A
• Fits 2005-2006 Mercedes-Benz CL65 AMG, N/A
• Fits 2003-2011 Mercedes-Benz G55 AMG, N/A
• Fits 2009-2011 Mercedes-Benz SLK300, N/A
• Fits 2010 Mercedes-Benz ML450, N/A
• Fits 2010 Mercedes-Benz S400, N/A
• Fits 2006-2009 Mercedes-Benz CLK350, N/A
• Fits 2007-2009 Mercedes-Benz CLK550, N/A
• Fits 2007-2009 Mercedes-Benz CLK63 AMG, N/A
• Fits 1996-2009 Mercedes-Benz E320, N/A
• Fits 2007-2009 Mercedes-Benz GL320, N/A
• Fits 2007-2009 Mercedes-Benz ML320, N/A
• Fits 2007-2009 Mercedes-Benz R320, N/A
• Fits 2004-2009 Mercedes-Benz SL600, N/A
• Fits 1998-2002 Mercedes-Benz SL600, N/A
• Fits 2005-2009 Mercedes-Benz SLR McLaren, N/A
• Fits 2002-2008 Mercedes-Benz G500, N/A
• Fits 2003-2008 Mercedes-Benz SL55 AMG, N/A
• Fits 2006-2008 Mercedes-Benz SLK280, N/A
• Fits 2002-2007 Mercedes-Benz C230, N/A
• Fits 2006-2007 Mercedes-Benz C280, N/A
• Fits 1998-2000 Mercedes-Benz C280, N/A
• Fits 2006-2007 Mercedes-Benz ML500, N/A
• Fits 2006-2007 Mercedes-Benz R500, N/A
• Fits 2007 Mercedes-Benz R63 AMG, N/A
• Fits 2005-2006 Mercedes-Benz C55 AMG, N/A
• Fits 2000-2006 Mercedes-Benz CL500, N/A
• Fits 2001-2006 Mercedes-Benz CL55 AMG, N/A
• Fits 2003-2006 Mercedes-Benz CLK500, N/A
• Fits 2001-2006 Mercedes-Benz CLK55 AMG, N/A
• Fits 2006 Mercedes-Benz CLS500, N/A
• Fits 2006 Mercedes-Benz CLS55 AMG, N/A
• Fits 2003-2006 Mercedes-Benz E500, N/A
• Fits 1999-2006 Mercedes-Benz E55 AMG, N/A
• Fits 2000-2006 Mercedes-Benz S430, N/A
• Fits 2001-2006 Mercedes-Benz S55 AMG, N/A
• Fits 1998-2006 Mercedes-Benz SL500, N/A
• Fits 2001-2005 Mercedes-Benz C240, N/A
• Fits 2001-2005 Mercedes-Benz C320, N/A
• Fits 1998-2005 Mercedes-Benz CLK320, N/A
• Fits 2002-2004 Mercedes-Benz C32 AMG, N/A
• Fits 2002-2004 Mercedes-Benz SLK32 AMG, N/A
• Fits 2001-2004 Mercedes-Benz SLK320, N/A
• Fits 1999-2003 Mercedes-Benz CLK430, N/A
• Fits 1998-2002 Mercedes-Benz E430, N/A
• Fits 1998-1999 Mercedes-Benz S320, N/A
• Fits 1998-1999 Mercedes-Benz S420, N/A
• Fits 1997 Mercedes-Benz E420, N/A

Installation Notes and Tips

Confirm the filler neck dimensions and pressure rating before installation. This Gates radiator cap is a threaded coolant bottle cap for closed-system applications, so the cap should seat fully and tighten smoothly without forcing. Inspect the filler neck, sealing surfaces, and coolant reservoir for wear, cracks, or contamination before installing the new cap.

Quality Assurance

Gates manufactures this OE Type Radiator Cap to meet or exceed OEM specifications in function, form, and fit. The corrosion-resistant construction is selected for long service life and accurate pressure control, and the design meets environmental regulatory standards intended to reduce air pollution.