HOW TO RESET Mercury Cougar Service Wrench Light

Mercury Cougar Service Wrench Maintenance Light Reset

Hello!  my friends. Here I am again, Erwin Salarda. I am now making my first tutorial about the Mercury vehicle. Today we have this tutorial on how to reset the WRENCH Service and Maintenance reminder indicator light in the Mercury Cougar. Please follow my step-by-step tutorial below.

NOTE: The wrench service light reminder should not be turned off until after the recommended routine preventative maintenance has been carried out, such as the replacement of the engine oil and oil filter.


5 Steps To Reset The Mercy Cougar Maintenance Wrench Light

mercury cougar wrench light reset


  • Gear to the Park position.


  • Turn the IGNITION ON.


  • After turning the ignition on, the service WRENCH light will turn on in the above panel.


  • While the WRENCH light is on, press and hold the SELECT and UNITS buttons together for 5 seconds, or until the service WRENCH light turns off.

cougar select and units button


  • Service maintenance reset is now complete.

That is a quick and easy to follow tutorial. I am hoping this tutorial is working for your Mercury Cougar cars. Thank you for visiting my website. Erwin C. Salarda