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W140 Mercedes 500 SE, 1992, European, 440.000 km
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first you must check error codes. there are 4 ABS sensors on the car. then you must repair/replace the sensor which is damaged or ruined.

As far as I know (but you must verify) the sensor comes with the harness and the price is about 300 - 450 EUR here in europe. there are some reports about repairing harness but this is not recommended of course.
 

· Registered
W140 Mercedes 500 SE, 1992, European, 440.000 km
Joined
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4,459 Posts
well I am not an expert for MB cars, taht's true. I just presumed that your car like mine has 4 ABS sensors. if somebody would ask me how many sensors each car in the world with ABS has, I would say 4 :). So you did not convince me but somebody else will probably confirm your statement. Sorry for now. anyway, two is more than one, so you have to check which one is bad.

in addition, I must also admit that i do not differ between the brake sensor and abs sensor. Another thing which somebody can explain here.
 

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W140 Mercedes 500 SE, 1992, European, 440.000 km
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4,459 Posts
you are welcome. Ok, now it is clear. 8 pad sensors makes sense. I still think that your car has 4 ABS sensors, but like I said, i am not an expert for MB neither for cars in general. for me it is logical that all 4 wheels are controled by ABS computer. What is the purpose of not to block only the front pair of wheels if the rear pair is blocked and therefore causing all negative effects? But like I said, I cannot be 100% sure because cars are not my speciality.

in my car the rear ABS sensors are not so evident like the front ones.

maybe you have built-in error codes device? I read that some US models have a blinker code reader under the hood near the computers box (right side at the windshield). if not, the only way is to somehow read the codes at the mechanic's and he will tell you which sensors are bad.

best regards.
 

· Registered
W140 Mercedes 500 SE, 1992, European, 440.000 km
Joined
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4,459 Posts
No software required, just build the code reader and read the codes on the 38 pin diagnostic connector. Lots of info in the archives.
that's true. you can make your own code reader for several dollars, just search this forum for solutions (type "error codes", "code reader" , etc.). If you need specific help let us know. I made it and it works fine. it is very very easy.
 
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