Question about 1994 Mercedes-Benz S-Class

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ASR LIGHT IN 600 V12 MERCEDES 94. WHAT TO DO. I REWIRE BOTH ETA,S .REWIRE ANY BAD WIRING I SEE. BUT STILL THE LIGHT IS ON WHEN I START THE CAR WITH NO POWER AND HARD ACCELERATOR. I DID NOT TRY TO CHANGE OVP RELAY YET. MOST OF EXPERT SAID SO. TANKS DR ADEL

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I have the same problem with my 600sel '92. ( New wire harness , new mafs , cleand everything , checked every sensor , still no result. )
I'm thinking the problem is relayed to the catalyst system on the exhaust. So these days i will take the exhaust off and see what happens. My car's ASR turns on when i start it. The catalyst , when old , the car goes into fault mode because the engine is strangeling.... Check that!

Posted on Oct 02, 2011

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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.

Posted on May 14, 2010

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You need to change computer E GAS

Posted on Nov 30, 2012

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1 Answer

I have a 1992 mercedes 300 se the ASR LIGHT GOES ON


Cable binding, do not press gas when starting, speed sensor on the wheel could have failed or be dirty, ASR module could be bad, upper engine wiring harness could be failing. Go to benzworld dot org or peachparts dot com for more specific help and guides.

Jun 18, 2010 | 1992 Mercedes-Benz Mercedes Benz S Class

1 Answer

I had my igntion lock replaced know have a problem starting from cold,OK when worm.Could it be choke


The replacement is a coincidence. It is probably your cold start valve is not operating or your ETA/EHA is bad due to the wiring harness issues from 1992-1995 in MB's. I suggest checking your engine wiring harness and EHA/ETA.

Aug 18, 2009 | 1992 Mercedes-Benz E-Class

1 Answer

Asr limp home MB 600


Model years 93 and 94 have the L.H. type fuel injection system. There is also e.z.l.(ignition),a.s.r.(acceleration slip regulation-traction)i.s.c.-c.c.-e.a.(idle speed control,cruise control and electronic acuater),d.m.(diagnostic mod.)and the base module. With a v-12 there is 2 of everything exept base and d.m.. the d.m. mod. overlooks the entire system and the base supplies voltage to the computers. This system is complicated and difficult to diag. Most likley one of your electronic acuaters is faulty. That is your throttle motor. These era vehicles have wire harness issues. Have the car ran for codes starting with the d.m.. at least this vehicle will store faults-the light does not have to be on to read the fault. More than likley you will find an e.a. code. You can have these motors rebuilt for about 1/4 the cost of a new one. Also never attempt to raise idle at one of the actuaters because if they are not both moved at the same time you will lose throttle synchronization and have to have the memmory cleared and resynch. motors. It will cause the exact symptoms like you described-also when the pigtail harness wires short and the modules lose the throttle synch. Good luck

Jul 28, 2009 | 2005 Mercedes-Benz Mercedes Benz CL600

2 Answers

The asr light is on and the car does not


the o2 senser would not cause the a.s.r. light to come on-there is only 2 things that the engine module and the a.s.r. module have in common. 1 is the e.a. actuater(throttle) and 2 is the base module. most likley either your acuater has to be resynchronized or the actuater itself is bad. have codes pulled from your h.f.m.,a.s.r.,e.a-i.s.c.-c.c modules and see what the codes say. You will probably find that they say e.a. actuater module is defective. the pig tail connecters go bad and they need to be replaced just be glad you do not have a 600 series because they cost about 1200 a piece and the v12 have 2 of them. If it is defective and you cannot resynchronize it there is a company that rebuilds them for about 1/3 the cost of a new one- good luck

Jun 17, 2009 | 1995 Mercedes-Benz S-Class

2 Answers

1994. MBz, s600. v-12. ASR. dashboard light.


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).

Mar 14, 2009 | 1994 Mercedes-Benz E-Class

1 Answer

1994. MBz, s600. v-12. ASR. dashboard light.


The ASR (acceleration slip regulation) light is for the ETA (electronic throttle actuator) it is a mysterious beast that controls throttle placement. I would say that you have one of two problems. Either the interior insulation of the wiring of the ETA is is crumbling or the wiring harness is disintegrating. Either fix isn't cheap although if I had to pick one I'd pick the wiring harness. It's about a third of an ETA. In short check he wiring to the ETA, look for damage or water intrusion, if nothing is found you will have to replace the ETA control.
READ THIS POST FROM A M-BENZ FORUM MEMBER ON ASR ISSUE
For two years I lived with the the ASR light coming on shortly after starting the car and had to either continue driving it in the limp home mode, or stop the car to restart it to regain normal engine operation with the ASR light out. Finally, it got so bad I simply took a chance, after discussing the problem with a reputable local indie, and bought a rebuilt ETA from Potomac German Auto and put it in. The part had a one year warranty with it and was about half the cost of a new unit from MB. There are other companies out there that rebuild these units as well. At any rate the ASR problem went away. To give you a reference point, my car had about 156,000 miles on it when I did this repair. That may or may not be significant to your situation, and I probably should have corrected this problem well before I did, but I didn't.

Dec 31, 2008 | 1994 Mercedes-Benz S-Class

1 Answer

94, MB. Dash light ASR.


From what you said the car goes to LIMP HOME mode and that is ASR issue that can't be solved by connecting your car to the computer and having the issue pinpointed. ASR can't be tested.You will have to replace engine wiring harnes FIRST part # 140 540 47 05 buy on line or on EBAY cost is about $610.00, check the performance of your car, if you lucky then this it. But from my experience next to replace is a left ETA (if not two of them) to fix this problem they are VERY EXPENSIVE about $4000.00 ea. ETA Left # 000 141 72 25 and right # 000 141 39 25. Word of advice DON"T BUY ANY OF THE ABOVE MENTION PARTS USED, remove your own ETA's from the car and call BBA Remanufacturing Inc. @ 866-573-2740 (www.bba-reman.com) they can rebuild your own ETA's at about $300.00 ea plus shipping.The work is guaranteed. After replacing above parts the car will run like new. No ASR issues for next 10-15 years. So far I find this as a number one issue with Mercedes S600. Good luck.

Dec 30, 2008 | 1994 Mercedes-Benz S-Class

1 Answer

Asr light


replace the ASR system ETA (electronic throttle actuator cotrol assembly) actuator, this is the most common issue with ASR lights, this system is a real problem, lots of posts on the internet about problems with it like yours. .

Dec 17, 2008 | 1993 Mercedes-Benz E-Class

2 Answers

Good offer?


i had a cl 600 with the first run of distronic i did not like the distronic or naviagtion but engine was really sweet. i had a check engine light problem. it too 4 visits to dealer to correct. it was some emission issue the car was really sweet. i traded it on a 2004 sl 600 which i hated after a month. there was not panaromic roof and i felt cramped the car was really quick and a gas hog. i traded it for a cls 55 and now i have a cl 63.

May 14, 2008 | 2005 Mercedes-Benz Mercedes Benz CL600

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