Some turn signal indicator lights use the turn signal bulb not in use to provide the return ground path for the indicator. If that is a LED, your turn signal indicator won't work. I have one of those in another vehicle. Don't know whether it applies to the Mercedes. Because the motor and alternator is running whenever the turn signal is flashing, it doesn't help the battery. I'm a LED fan, but the turn signal LED won't save many dinosaurs.
Larry
--- In diesel_mercedes@yahoogroups.com, "Nate" <vwnate1@...> wrote:
>
>
> Tell you what Tom :
>
> You but four # 1157 and four # 1156 LED lamps and try 'em out , if you don't like 'em , I'll buy 'em including the fright charges and use in my old truck , Ural Motos etc. , no loss to you either way .
>
> Tom's question has to do with the transitorized turn signal flashers out Mercedes' all use ~ LED's likely won't draw sufficient current to make it flash , I don't care I can use them in my stuff .
>
> -Nate
> Tom wrote :
>
> > Tom,
> >
> > I have an entirely different question for you.
> >
> > I recently replace the left rear light assembly on my 1981 300SD. I
> > found a good, uncracked one on a 560 SEL in the Monrovia PaP yard. I
> > brought it home, took the lens off the plastic frame, washed it thoroughly,
> > washed the lamp housing, let it all dry completely.
> >
> > After reassembly, and installation of all new bulbs, it fit into my
> > car perfectly, as only a 32 year old Mercedes part can.
> >
> > But while putting in the new bulbs, I started wondering about LEDs.
> > We are getting superbrite LEDs now that have almost the same light output as
> > an incandescent bulb, but at a much lower current draw.
> >
> > I wonder whether we can use LED bulbs in the turn signals. I know
> > that some turn signal activators, particularly "of a certain age" (as we say
> > of beautiful women and machines), required enough current draw from the
> > bulbs to activate.
> >
> > Are the turn signal activators in 123 and 126 series cars able to
> > operate with the low current draw of LEDs? Considering the price of LED bulbs
> > still, I am not excited enough to test them out on my own. But I just know
> > that you folks at the Classic Center will either know the answer, or know
> > who in Stuttgart to get the answer from.
> >
> > Cordially,
> > The other Tom: '81 300SD, 37+,+++ miles
> >
>
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