Mercedes Relay Up for sales is good used Mercedes Fuel Pump relay. This should fit many different mercedes cars, check your part number to be sure. The Mercedes part number on this relay is 003 545 25 05 -  Frequent issues with this relay cause no start, either continuous, or intermittent. . These are located in the back of your fuse box in the engine bay. I only sell the OEM units, never aftermarket so they are the same quality as your original.  This was removed from a recent crash damaged totaled car. Thanks for looking!