Keep your charging system steady with the Standard Ignition Voltage Regulator VR-485. It's a direct-fit replacement for the listed applications, including the 1985-1989 Mercedes-Benz 190D (L4-2.2L, L5-2.5L), 1985-1992 190E (L4-2.3L, L6-2.6L), 1986-1989 and 1991-1992 300E (L6-2.6L, L6-3.0L), 1986-1991 560SEL (V8-5.6L), and the 1980-1983 Saab 900 (L4-2.0L) — see the "Vehicles it fits" section for the full list of 22 applications.
A voltage regulator monitors and controls the alternator's output, holding charging voltage within a set range so the battery and vehicle electronics aren't overcharged or undercharged.
- Charging control: Regulates alternator output voltage to keep the electrical system within its designed operating range.
- Component protection: Helps guard the battery and sensitive electronics from voltage that runs too high or too low.
- Direct-fit replacement: Serves as a replacement voltage regulator for the listed applications.
Signs the regulator may need replacing include dim, flickering, or unusually bright lights and a battery that runs down or shows signs of overcharging. If a failed voltage regulator is the cause, this part replaces it; diagnose the charging system first, since these symptoms can have other causes.
Manufacturer part number VR-485 (also VR485).
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
What does the VR-485 voltage regulator do?
It monitors and controls the alternator's output voltage, holding the charging system within its designed range so the battery and electronics aren't over- or undercharged.
Will this fit my vehicle?
It's a direct-fit replacement for the 22 listed applications, including many 1985-1992 Mercedes-Benz models and the 1980-1983 Saab 900. Check the "Vehicles it fits" section to confirm your exact year, model, and engine.
What are signs my voltage regulator may need replacing?
Dim, flickering, or unusually bright lights and a battery that runs down or overcharges can be signs. These symptoms have other possible causes, so diagnose the charging system before replacing.
Which Mercedes-Benz engines does it cover?
Listed applications span L4-2.2L, L4-2.3L, L5-2.5L, L5-3.0L, L6-2.6L, L6-3.0L, V8-4.2L, and V8-5.6L engines. See the "Vehicles it fits" section to match your specific engine code.
Will replacing this fix my charging problem?
If a failed voltage regulator is the cause, this replaces it. Because charging issues can stem from the alternator, battery, or wiring, diagnose the system first to confirm the regulator is at fault.
