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1992 mercedes 600sel want to know where over voltage protection relay is located as i have an asr/abs problem with engine in limp mode

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Behind your battery, there is a plastic cover. Remove this plastic, you will see the big Unit, ECU and 3 little square relays. one is for Fuel relay, one is for OPV, and one is for AC module. They all have labels. Good luck.

Posted on Jul 27, 2009

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I have a 1992 Mercedes s500 which occasionally the rev counter suddenly jumps up & down then stops completely then ASR light comes on and the car goes into ''limp mode'', then after a few minutes it...


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I had a similair problem on my 600SEL 93, I read many articles and they were all bad news. When I checked the transmission fluid, I found out it was under a lot of pressure but the level was fine. After that the problem was gone.

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You should not have an OVP relay. Few things to check. Find your computer for the ASR and see if the fuse is blown on it. Also make sure there is slack in the accelerator cable, if it is snug it will initiate a limp home mode. Also replace all barrel fuses with copper ended fuses and clean corrosion out of the fuse box. When you find the ASR module if the fuse is good in it and with all that does not reset it, replace module and check rear end sensor and front wheel speed sensors.

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1 Answer

On a 1995 S500 Mercedes , ASR light keeps coming on


yes they can but unlikely-more likely a bad over voltage relay(powers up idle speed computer) or wire harness-your vehicle is probably a hfm type fuel injection they changed from lh that year. find out if it is lh check the fuses in the base module located in the passenger side of the engine compartment under a cover held in by 4mm allen head bolts-alot of times these control units have intermittent contact with there connectors. asr stands for acceleration slip regulation-both isc and asr communicate via can system to monitor throttle position- ea isc cc-idle speed cruise control and electronic actuater(throttle)-hopefully i have helped

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To make sure the problem will be solved, you have to replace left and right ETA's and engine wiring harnes.I had the same problem with my 1994 S600. expensive.Mercedes had wiring problems on all models from 1992- 1996 (insulation on wires would crack,and wires would short circut).

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How to remove the center console on a 1992 600SEL?


here is a place you can get a free online manual for your car!

maybe it will show where they hide the screws!

http://www.onlinefreeebooks.net/automotive-machinery-power-equipment-ebooks/mercedes-benz/1992-mercedes-benz-600sel-operators-manual-pdf.html

Jon V.

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