Mercedes Benz / Sprinter Wehrle OEM Diesel Glow Plug Relay # 6489000000 / 0005453616 100% NEW OEM Diesel Glow Plug Relay made by Wehrle. Mercedes Benz / Sprinter OE #: 6489000000 and 0005453616 Wehrle # 51799029 and 51299029 12V