Question about 2002 Mercedes-Benz C-Class

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02/03 C220 headlights electronic adjustment

The head light electronic adjustment does not function, what type of control is used (pnuematic, vacumm or direct), what is the control circuit and where are the control units physically located and how do I get to them?

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  • foamripper Feb 01, 2009

    I have a 04 c220 sport 4 door and my lights dont move by the roll swithch on the dash, the off side one will very very slightly move but near side nothing, i too cant find a motor? any ideas

  • Ryan Casper May 11, 2010

    I'm not sure of what kind of adjustment your are looking for. Please be more specific.



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Rtcasper Clarification Request; It is the electrical adjustment (Thumb wheel Adj on facia panel) that is not functioning not the mechanical adjustment on the head lights (Plastic cross head screw adjust L/R and U/D). The thumb wheel is usually a potentiometre adjusting a control voltage applied to the head light motor. On the Merc I can't see the motor and wonder if vertical head light adjustment is vacumme operated, where the vacumme pump is located or where i can get access to the wire loom to trace it though as I don't see how to get behind the facia. ANy suggestions as to how to get to and proove which bits are working? At the moment the headlights are adjusted to point correctly by the mechanical adjustment but this does not enable me to lower the lamps easily when I put a load in the boot.

Posted on Nov 16, 2008


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There should be a little screw to turn to adjust the head light. This will be in the head light assembly itself on top. If you have a manual they tell you in that also - but you should be able to find it any way. Some cars use a screw driver and some use a special type of screw driver you may have to buy.

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Why is my vehicle continuously Fast idling?

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Adjusting headlight on mercedes benz

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  1. Home
  2. Car Repair & Maintenance
  3. Car Lights Repair & Maintenance
  4. Adjust Headlights
  5. How to Adjust a Mercedes' Headlights
How to Adjust a Mercedes' Headlights

In the U.S. the type, adjustments, and illumination factors of all automobile lighting devices are regulated by the Federal Motor Vehicle Safety Standard 108. The headlights must function and be adjusted correctly. Your high beams must disperse their beams straight forward and low beams down and to the right while safely providing illumination without too much or too little glare. It is wise to check the headlight adjustment on your Mercedes at least every year. Doing it yourself will save you time and money. It will also make driving safer for you and others you may meet on the road at night. All it takes is time, some basic tools and a little patience.
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Things You'll Need
  • ratchet set
  • 1/4-inch screwdriver, at least 8 inches long
  • flashlight (if needed)
Show More Instructions
    • 1 Open the hood and prop it up.
    • 2 Remove components if necessary to allow access to the left/right and up/down adjustment knobs. They are on top of the rear side of the headlight. The upper knob adjusts the beam to the left and right. The lower knob controls up/down adjustments.
    • 3 Park with the passenger side of the car parallel to a solid fence or wall and about four feet from it. When there is dim light or darkness, turn on the lights and use your screwdriver to adjust the up/down knob on the passenger-side headlight until the light beam is parallel to the ground (you can see the beam of light against the surface of the wall).
    • 4 Turn the car so that it faces the wall approximately one car length away. Adjust the up/down knob on the driver-side headlight until it is at the same level as the passenger side headlight. Then adjust both sides until the small groove on top of the beam cutoff is directly in front of the light.
    • 5 Reinstall any components that you removed. Close the hood.
Tips & Warnings
  • This is method is generic for Mercedes models. Some may differ, as there are many models out there.
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