C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

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Old Sep 29, 2009 | 05:57 PM
  #1  
solekeeper's Avatar
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Please tell me

I didn't screw up something, I did my front pads today on my 07 c230, and the indicator that says "brake wear" is still on.
I have already driven the car about 10 miles everything is fine, system bled but still the warning is on..
Someone help please?

Thank You!
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Old Sep 29, 2009 | 06:07 PM
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Did you replace the pad wear sensor? You have to replace that to get rid of the warning.
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Old Sep 29, 2009 | 06:30 PM
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yea brad new sensor in place. Do I have to reset the CPU or something?
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Old Sep 29, 2009 | 07:01 PM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
As long as you are sure that the new sensors are plugged in your warning should reset the minute you remake the circuit. Benz sensors don't go to earth. You break the circuit by the sensor hitting the rotor. Are you sure you have not triggered a rear sensor as well?

Last edited by Glyn M Ruck; Sep 30, 2009 at 06:36 AM.
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Old Sep 29, 2009 | 07:28 PM
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how would I have triggered a rear sensor?
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Old Sep 29, 2009 | 09:08 PM
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THE C350
Originally Posted by solekeeper
how would I have triggered a rear sensor?
lol um lets see use the breaks. but yeah most cars have at least one in the front and one in the back some have more like mine has one on at each wheel.

Last edited by samaritrey; Sep 30, 2009 at 06:13 PM.
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Old Sep 30, 2009 | 04:31 AM
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I thought after 2005 they only had 1 front sensor? Mine only has 1 front.
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Old Sep 30, 2009 | 06:32 AM
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I just replaced my pads last weekend (9/26/09) and I didn't get the error message. I did replace the sensor with an OEM from MB. Make sure that its plugged in all the way or just unplug and check for a closed loop.

BTW - I have 2007 C230ss with the big brakes and pads replaced with Friction Master (morse CMX) with 40K. Dealership mentioned that I had at least 20 percent, but I noted 30% left.
Only one sensor on the front pass side, located in the inner pad.

Thanks
dirt diggler
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Old Sep 30, 2009 | 06:35 AM
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Originally Posted by solekeeper
how would I have triggered a rear sensor?
By wearing out the back pads - These cars vary from 4 sensors to one on the front which seems to be an American thing. All SA cars have either 2 or 4. My car has 4.
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Old Sep 30, 2009 | 02:22 PM
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Originally Posted by LILBENZ230
I thought after 2005 they only had 1 front sensor? Mine only has 1 front.

It does only have one sensor, passenger front side.
This is an 07...
I guess I will have to take the wheel off again and check it to see if the sensor is in correctly..
Does anyone know a way to reset the onboard cpu though?
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Old Sep 30, 2009 | 04:50 PM
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Originally Posted by samaritrey
lol um lets see use the breaks. but yeah most cars have at least one in the front and one in the back some have more like mine has one on each pad.
How does your c320 have one on each pad
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Old Sep 30, 2009 | 05:57 PM
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You have 1 and 1. One in front and one in rear. I think you might have a faulty sensor. You don't need to reset any "CPU".
Check the sensor again and if it's fine then get another one because it might have a defect (although that is odd). Then if you did change the sensor and you still get a problem then we can help you distinguish what the problem may be.
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Old Sep 30, 2009 | 06:14 PM
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THE C350
Originally Posted by krisv420
How does your c320 have one on each pad
i meant each wheel.
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Old Oct 7, 2009 | 03:53 AM
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'02 C240
mine's an 02 and only has one sensor.

Did you damage the sensor when installing it, tapping it in too hard?
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Old Oct 7, 2009 | 06:39 AM
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Oh man! - Benz really mess around with the number of sensors. I wonder how they decided who got what????
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Old Oct 7, 2009 | 06:54 AM
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From: In Kush Land So cal
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My sensors on my car on the passenger side front right and rear right..

Last edited by krisv420; Oct 7, 2009 at 06:57 AM.
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Old Oct 7, 2009 | 01:57 PM
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2005 C240 4MATIC, 2020 GLC300 4MATIC
Makes me wonder how many my 2005 C240 4MATIC has?
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Old Oct 7, 2009 | 02:56 PM
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From: In Kush Land So cal
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Originally Posted by ChrisBrown
Makes me wonder how many my 2005 C240 4MATIC has?
You can tell without taking the wheel off.. If you look at your calipers you will see 2 yellow wires. They may be a different color now but mine are yellow.. Well it really was black from the break dust LOL..
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Old Oct 7, 2009 | 03:58 PM
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THE C350
lol i think my car is different for some reason because i had a sensor go bad and i went to the dealer and they said my car should only have 3. i then told them it had 4 but the guy was an *** and would not sell me 4 because he claimed it can't have more than 3. needless to say he actually got a tech to go look at my car and found out their was 4. how many do the other 2001's have? i see 02 seems to only have two.
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Old Oct 7, 2009 | 10:10 PM
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my 03 c320 4matic has 2 front drivers and rear passenger side i believe
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Old Oct 7, 2009 | 10:25 PM
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Originally Posted by ChrisBrown
Makes me wonder how many my 2005 C240 4MATIC has?
1 on the front passenger side.
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