VOLTAGE REGULATOR

INTERNAL STYLE MOUNTED ON BACK OF 55 AMP ALTERNATOR. RECTANGULAR BLACK BOX WITH BRUSH SET IN ALTERNATOR CASING. FOR 55 AMP ALT. ONLY, NOT USED WITH 70 AMP UPGRADE. ORIGINALLY FOR; 450SL/SLC M117.982 FROM 030109 TO END 450SL/SLC M117.985 UP TO 046866.