ABS / BAS & ESP WARNING LAMPS ON - Mercedes-Benz Forum
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#1 (permalink) Old 02-05-2008, 07:25 PM
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Hi all,

I wondered if anyone here has an idea of what is going on with my dash unit...

I did a little work under the rear seat on the weekend, I had to disconnect the roof control unit so I removed the appropriate fuses to remove the power to this unit first.

However now I have the above lights on, on the dash, right from ignition start. I have tried the steering sensor reset (turn left & right) but no change, I tried removing the battery just incase but no change.

Running out of ideas here...

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#2 (permalink) Old 02-05-2008, 08:10 PM
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does your battery have the correct voltage? if not charge or replace if necessary ..

96 sl600 77k
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00 s10 278k
06 m109R 16k
69 chevelle 77k (sold)
-MR. PROC- 22yr
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#3 (permalink) Old 02-06-2008, 02:15 AM
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Hi Pigzmickey did you try the sync procedure ? Since you disconnected the roof control unit it might be needed.

Hope it helps.

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#4 (permalink) Old 02-08-2008, 02:08 PM
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I would check the fuses mounted in the top of the base module because it supplies power to the ESP module. If those are okay, then I would read diagnostic codes. Since this car is newer than '95 a Mercedes-specific code scanner is required. A Mercedes repair shop can do it, or you can get a Carsoft compatible scanner on eBay for about $100. I have two of these, and while they don't do everything they are advertised to do, they work great.

Many used parts available from a '92 SL. Email or PM for more information
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#5 (permalink) Old 05-18-2008, 05:25 PM
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Question ABS,BAS,and ESP lights all at once

1999 SL500 - All three lights came on at once. Any idea what this means ? Any suggestions on how to fix.
1999 sl500
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#6 (permalink) Old 05-18-2008, 07:17 PM
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When this happened to me, the cause was low voltage output from the battery. My situation was my tech was doing a 'stress test' of sorts on my battery when in for 60K mi service and drained it a bit. After I ran the car for 20 minutes or so, stopped, and restarted awhile later, all the lights (ABS, ESP & BAS) were out as the battery had returned to full charge.

Were you doing anything with the car just prior to these warning lights coming on? Putting the top up/down with engine off? If not, this could also be a sign of a weakening battery and you should have it tested.

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#7 (permalink) Old 05-19-2008, 01:10 AM
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Also might be a blown fuse in the Base Module. An advanced search on my username and Base Module will show a picture and more info.
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#8 (permalink) Old 08-15-2009, 12:23 PM
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Bas and ABS lights

Hi Everyone
I have been having trouble with the BAS and ABS coming on intermittently. They will come on and stay on for a day and then go off and are good for 3 or 4 days. I have taken it to the dealers and they have replaced the Steering Positioning Sensor and the Clockwork Spring. They have had the car for a week now and still can't find the problem. Has anyone got any ideas as to what the problem may be or where to look for the cause.
The car is a 1998 SL 500 with approximately 40,000 miles. Thanks for the help

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#9 (permalink) Old 08-15-2009, 02:22 PM
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Maybe this problem is the first one before your Instrument Cluster goes mad...

2 members here in France had the same problems...their IC starts blinking sometimes, then they lose power and so on...

On facelift models, there is no more OVP relay, but some calculators & Data BUS connected to the IC.


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