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The Location of the Fuel Relay on a Mercedes-Benz S500

Updated April 17, 2017

The Mercedes-Benz S500 is part of the S-class series of luxury sedans. An important component of the S500 is the fuel pump relay, which turns on the fuel pump when the engine is turned on and powers down the engine when the ignition is shut down. The fuel pump relay is located within the inner structure of the vehicle, however, once accessed, it allows owners to tighten or replace the component as needed.

Ensure that the Mercedes-Benz engine is turned off.

Examine the rear compartment area on the passenger's side of the boot area.

Unscrew the bolts of the trim panel with a socket wrench. Lift the panel off and set the component aside. The fuel pump relay will be mounted in the fenderwell, identifiable as a black rectangular block similar in appearance to a wall cell phone charger.

Things You'll Need

  • Socket wrench
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About the Author

Based in Southern California, Melissa Rogers has been writing professionally since 2006. Her work has been featured in "Popstar! Magazine" and used for the "MTV Canada Special: Miley Cyrus Can't Be Tamed." Her work reporting on the entertainment industry is often sourced by websites such as OceanUp and FuseTV. Rogers has an associate degree in communications from Saddleback College.