Mercedes-Benz W212 E350 Relay Module A0035421819 750H-R1A-B010 Direct Replacement

In Mercedes-Benz W212 E350 engine bay, relay module (OEM 750H-R1A-B010) controls starting, fuel pump power, and distribution of power to some electronic systems, ensuring key circuits are energized stably when needed. This module fits W212 E350 and vehicles with M272/M276 engines. Installation difficulty: medium; approximate service time 30 minutes; disconnect the battery negative before work. If starting trouble, intermittent stalling, multiple warning lights on the dash, or unusual sounds from the relay box occur, please check promptly.