This morning when my wife started to work in our 95 SL-320, the ASR, ABS, roll bar warning lights each came on solid. The roll bar still moves but the top will not go down. I have heard the overvoltage relay or the fuse next to it could be the cause but I don't know where it is. The owners manual states that the ABS indicator will come on if the charging voltage falls below 10 volts. This then defeats the ASR system. The battery appears fine and I measured charge voltage while running.

Any ideas would be greatly appreciated. Also any suggestions for obtaining decent service manuals and schematics.

Thanks in advance, Mike

Have you jump started the car? Usually the overvoltage relay will only be affected with a power surge.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

We have not jumped the battery or given a jump to anyone. Heck didn't even know where it was until I went looking for it! I don't know if they stayed on when she started it or if they came on around the corner. She drove it back as soon as she noticed it.

I don't know what else to tell you...I guess I would take the car to the dealer on tuesday when everyone goes back to work.
Good luck and let us know what it was!

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Well I got the car back today. It took two days to fix. On Wednesday they told me the the stop switch was bad and that was causing the ABS and ASR warning lights. The roll bar warning was caused by a weak battery. I believed the switch the battery sounded fishy. The battery is four years old so its probably near the end of its life anyway so ok, go ahead. Also I didn't see the tie in that caused them to fail at the exact same time. The didn't finish it yesterday and still hadn't by lunch time. At 3:00 they called and said they found some other problems. After replacing the above parts the still had voltage problems and finally traced it to coroded connections and bad wires under the fuse block. This then fixed the problems. They said this was in addition to the other stuff. It seems fine now but I am a little concerned by wiring problems under the fuse block. I hope this isn't the first of many connection problems. Total for this repair was $750. Thanks for your help.

Thanks for the update!!

Benzmac:
After reading your reply on july 4, I'm slightly confused(i.e. slightly more than usual ;-). Are you saying that it's not a good idea to jump start an MB?

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Darko Vusir
1994 C220