Brand New Voltage Regulator Alternator Charging System For 2001-2006 Mercedes C E and MLVoltage regulators control the charging voltage that the alternator outputs,generally keeping it between 13.5 and 14.5 V, to protect the electricalcomponents throughout the vehicle. When not replaced, the battery candischarge or over charge (causing battery damage), the engine will die, thecheck engine light will illuminate, or alternator damage may occur. AIPElectronics voltage regulators are designed to meet or exceed OEspecifications in form, fit and function to protect your electrical systems.Manufacturer: AIP Electronics100% New ConstructionHigh Quality OEM Replacement/OES PartFit and Quality GuaranteedReady for Install Straight out of the boxChannelSaleTech-specs3250071C20 88925154 96052000 F00M145225 VR845 1V1041 IB225