Hello all, I have a 1979 280SL. With car switched off the battery light is lit, once the car is started the light goes out. I checked the voltgage at the battery with the car at idle and its 12v or less and will slowly discharge. I have had the alternator rebuilt and still the same problem. With the battery light lit with the car in the switched off position does this indicate a short?

Is the blue wire to the bulb in good shape? It might be grounded.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

you will find many answers.


Have a great day.

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What blue wire are you speaking of?

Thanks everyone for the information, I will post soon and keep you aprised of the results and hopefully the solution.