I have a 1978 450 SL. I had originally thought I just had a buned out headlight(Low Beam) on the passenger side. Bu when I was checking it out, I noticed that the low beam worked when I had it set to high beam. I have a 4 headlight syetem(plus the 2 driving lights).
Do I have a bad low beam, or is there an elictrical problem?

Thanks,

Don Solomon
1978 450 SL
Durango, CO

Most likely you do have a headlight bulb problem. There are separate filaments for low and high beam within the bulb. The fact that it works in "High" has no relavance except to prove the ground circuit.

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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician

[This message has been edited by stevebfl (edited 07-03-2000).]

Do your low beams work when replaced and then blow ?

Could be a problem with the voltage regulator on the back of the alternator.

AARON ROCHARD

1976 230.4