I wonder if that "unmarked light" is where the ABS indicator is supposed to go...

Try unplugging power to the ABS unit to see if that brings the ABS light on.

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

I had been tol aqnd had wondered the same thing. Where is the plug/connection for the abs?

I have no idea, but it'll be whatever wiring is going to the ABS unit. Should be mounted on the left side (US passenger side), and should have 4 roughly 1/4" steel tubing lines coming out of it.

Disconnecting a wheel speed sensor should have the same effect as well.

Sorry I can't be more help, but I'm still new to the MB scene and I've yet to do anything more than pay attention to my engine (I haven't even taken the wheels off yet!).

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

I will look for the wires now to dis-connect the ABS. If I do need an idle speed module, I wonder from what different years/models would work? Also, if, god forbid, it is the ECU, woulden't there be other problems as well? does the ECU or main computer or whatever have a fuse, or does it use the OVP for that (probably a stupid question) The fuse panel cover has been mis-placed, and I cannot remember any of the fuse designations>

Thanks,

DDaymen

I removed the plastic cover from the ABS unit, unplugged the wiring harness, even removed the two relays, still no ABS light, not with the key on, or the engine running!

Also, there is a ground strap from the ABS unit to the frame, which i made sure is getting good connections. I also made sure the pins on the plug going to the ABS unit, as well as the pins on the relays were clean, no change, and the unmarked light is to the left of the ABS light.

Did you try driving and braking hard? The brakes should react like you have no ABS system (which I prefer)... If the light doesn't come on after that, it could be burned out.

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

I think I got it fixed (again!), will post tomorrow what I did/find etc (involves ABS/OVP relay).

DDaymen

Well I removed the OVP relay, double checked thwe solder connections, removed the relays on top of the ABS, checked to make sure all the connections going to the ABS were good, replaced the fuse in the OVP just to di it, and the car started right up , normal, no high idle. This morning on my way to work, I stopped to get coffee, when I started the car up it went to high idle again! when I started it up to come home, it idled normally the when I was at a light near home, the idle jumped up again! when this happened I heard a "click: from where the OVP relay is, now after several starting times it still idles 1800! I wonder if there is some kind of "short" or rubbing wire to the ABS, or OVP relay. also, when it rains there is a drip by the fuse panel, I wonder if it is getting wet behind it or behind the OVP relay this is getting crazy, works one minute, then starts high idle the next. I wonder if I,m on the right track, maybe just a little off on what else I should be doing. I don't think it is the idle speed control module. Also, the ABS light never lights up, just the one to the left of it that has no marking/symbols, like some kind of extra light. I wonder if this unmarked light is supposed to light or did someone have the instrument cluster out for some reason and got the lights switched around?

Long post, I know>

Thanks,
-DDaymen

I think I have narrowed it down to something involving the OVP relay, when I started the car different times today, all was well untill I turned something on, the I could hear the relay "click"--then high idle!
I was reading some older posts which described someething like this, like maybe a not-so-good ground connection foe the OVP relay, or even the hot wire to it. In the morning I will take a close look at the socket for said OVP relay.

Sure as heck hope I'm on to it!

-DDaymen