1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

R230 Headlight Aim?

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Aitch55, Oct 17, 2012.

  1. Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    The xenon headlight aim on my car seems too low for both dipped and main beam. The dipped beam pattern, on the road, has a sharp cut-off so it only illuminates the area immediately in front and to the left. Main beam is also low but are so good, throw sufficient light to illuminate enough of the road ahead.

    Problems arise when on unlit roads and another vehicle appears coming the other way, I dip the lights and suddenly driving on memory, so have to slow accordingly.

    Is there an adjuster on the headlights to raise them? I've searched this forum and googled but can't find anything.

    TIA
     
  2. drmw

    drmw Moderator

    Messages:
    3,681
    Likes Received:
    112
    Joined:
    Nov 25, 2007
    Location:
    Yorkshire
    Your Mercedes:
    M6 Cab - prior to that, SL63 AMG, A-M V8 Vantage, SL55, SL500 and many more
    you can't adjust xenons (well, ok, a dealer with Star can move them a bit) but if yours are as bad as this, you need to check the link (I believe it's on the rear suspension) that tells the automatic leveling adjustment how the car is sitting.

    If this has come adrift, the lights will probably default to the lowest setting possible.

    One way to tell is to park in front of a wall, put on the dipped beam, then open the boot and bounce the car up and down (sit on the boot opening would work) - the headlights should stay level and not bounce up & down with the car
     
  3. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    Well, how stupid am I? :rolleyes:

    There I was under the bonnet, looking around the headlights for an adjuster when I should have been underneath at the other end. :shock::)

    Thanks for your help. I'll try your test method and see what happens.
     
  4. Naraic

    Naraic Moderator

    Messages:
    10,330
    Likes Received:
    942
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    Get down on your knees, in front of the rear offside wheel and look underneath. If you see a bar hanging loose...that's your problem.
     
  5. brandwooddixon

    brandwooddixon Senior Member

    Messages:
    3,263
    Likes Received:
    103
    Joined:
    Jul 31, 2006
    Location:
    Wolverhampton
    Your Mercedes:
    CL500 Bluefficency 2012
    Do have a look at the top of the headlights.
    My car has Xenons and a level adjuster on the top of the headlamp unit.
    I find myself raising the headlamp aim typically after a MOT as they insist on testing the headlamp aim with the engine off (in which case the lamps are in a park position rather than the position that they would switch to when the suspension position is taken into account).
     
  6. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    Just did as you suggest and can't see anything loose or hanging. Even laid on my back to peer under but nothing untoward looking.
     
  7. Naraic

    Naraic Moderator

    Messages:
    10,330
    Likes Received:
    942
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    There's one on the front also...worth checking.
     
  8. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    Whereabouts on the front? There's not much room underneath for inspection purposes.

    Just about to upload some pix of what may be the adjuster that brandwooddixon refers to.
     
  9. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    You are all wrong on this,,, on the 230 the lamps share the B27 /28 etc ABC level sensors

    It will have to go no STAR to what has failed as both lamps are pointing down
     
  10. Naraic

    Naraic Moderator

    Messages:
    10,330
    Likes Received:
    942
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
  11. Naraic

    Naraic Moderator

    Messages:
    10,330
    Likes Received:
    942
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    What about the links above?
     
  12. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    There is one level sensor on each corner attached to the upper wishbone, that is for both the lamps and suspension. These are the ones that people use to lower the car
     
  13. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    There's now three schools of thought on this one so I'll take the easy option first. :)

    Pic of top of headlight with the only thing that looks to have any adjustment.
    [​IMG]

    The 'adjuster' looks to have a threaded shaft with hexagon and a lock nut. Looking a little closer, I'm guessing the shaft has a cam so rotating the shaft via the top hex will rotate the shaft in an eccentric fashion. Then hold and lock off with the nut? The plastic 'fingers' will flex so any resistance will bend these rather than force the housing.

    [​IMG]

    Interestingly the n/s nut is at the bottom of the thread and presumably tight. Whereas the o/s nut is mid thread and loose.

    [​IMG]

    [​IMG]
     
  14. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    From what I can tell, the suspension doesn't have a problem and each corner is equal height. Surely, if it were a sensor that's common to both suspension and headlight, it would show on both?
     
  15. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    They are not the adjusters, there are 2 holes for a large screwdriver on the plastic coves near the red label, one is side adjust, and the other up and down



    If you go to Lamps in WIS it tells you the B22/7 & 8 are the front level sensors and B22/8 & 19 are the rear, if you go to the ABC it is the same sensors to level the car, I would have thought that a CAN break down somewhere could cause the loss of both lamps to level or the rotten fault that I had with a bad connection on the ABC ECU under the dash by the steering wheel, those connectors have more than 100 pins

    If you can raise the lamps enough on those to screws (phillps head) then I would not worry
     
  16. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    This why it is not a B22 sensor at fault,,if it was the car would be low on that corner, it is a communication problem
     
  17. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    By the way do not move those big nuts you have shown in your diagram, the screws that I am referring to are quite a way down and a long driver needed, shine torch down and you will see the large headed screws
     
  18. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    Do you know what those large nuts are? My instinct is to tighten the one that's midway on the thread and possibly loose.
     
  19. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    They are the securing nuts, just nip them up, just lock them where they are
     
  20. OP
    Aitch55

    Aitch55 Senior Member

    Messages:
    166
    Likes Received:
    1
    Joined:
    May 21, 2012
    Location:
    Bedfordshire
    Your Mercedes:
    SL55 AMG
    Thank you.

    I'll try your adjusters after dark and see what happens.

    Thank you all for your input and suggestions.
     

Share This Page