Blower Motor Regulator for Mercedes W140 S320 S350 S420 S500 S600 CL500 CL600 Heater Blower Resistor Regulator Control Motor For Mercedes W140 Part #: 1408218351, 1408218451, RU-570, 140 821 8451 Direct fit replacement unit 180-days manufacturer type warranty limited Application Guides: Mercedes W140 S320 S350 S420 S500 S600 CL500 CL600