Yesterday, I had a BRIGHT pad wear indicator light. Today, I pull the wheels and the top right side sensor wire is loose and doesn't seat firmly. I wrap it in electrical tape and seat it - it's fairly firm in there. Light goes away. Tonite, the light is back but DIM. The pads look thick enough to me but I've never dealt with MB pads. Brake fluid is at max.

Is the sensor(s) failing or are these pads too thin for an 83 300SD?




Note the electrical tape on the top wire - keeps it seated better.

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1983 300SD 307k miles
1993 Ford Escort Wagon 215k miles
1995 Isuzu P'up 214k miles

those pads dont look too worn but it may be my vision. . its easy enough to check the wear sensors, pull them out and check the piece that goes into the pad. if its not completly round or looks worn in any way shape or form then its time to replace them. just be very carefull when removing them so you dont break any of them.

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have no worries.....President Obama swears "If you like your gun, you can keep it

it shouldnt make the light go on.

if you leave them off it doesnt lite up.

maybe you have a faulty sensor wire.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

thats correct, they have to wear,causing the sensor to ground out on the rotor.

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have no worries.....President Obama swears "If you like your gun, you can keep it

Thanks, kmaysob and Tom W.

Faulty sensor wire grounding makes sense. I'll get new ones....Fastlane has 4 for $10.

PS: kmaysob, you sure have a low mileage 300SD LOL

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1983 300SD 307k miles
1993 Ford Escort Wagon 215k miles
1995 Isuzu P'up 214k miles

well now that you made me notice, thats my old one that i no longer have. you think thats low, the one i have now just turned over to 145,000

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have no worries.....President Obama swears "If you like your gun, you can keep it

The sensors may be cracked and grounding out on something. Either replace them or just pull them off. If you keep an eye on the pad wear you really don't need them. But they are still nice to have.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

when i bought my first mercedes they were disconnected and wrapped around the upper control arm. (the pads were really worn

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have no worries.....President Obama swears "If you like your gun, you can keep it

I started having the same problem with my brakes. Each time I step on the brakes, the pad wear light comes on. I just had my tires rotated and my pads still have over 70% left on them. Clearly something is wrong with one or more of the sensors. I keep a close eye on the pads for wear so I won't even bother with replacing the wear sensor.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver