B200 Reset the brake light? - Mercedes-Benz Forum
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#1 (permalink) Old 12-09-2009, 07:48 PM
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B200 Reset the brake light?

My B200 had it's "Brake Wear" message appear on the dash. I had the brakes checked and the front pads were low. So I had them replaced. However the "Brake Wear" message still appears.

My question is...does anyone know how to reset the computer so the "Brake Wear" message no longer appears?
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#2 (permalink) Old 12-09-2009, 08:36 PM
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Originally Posted by tceepa View Post
My B200 had it's "Brake Wear" message appear on the dash. I had the brakes checked and the front pads were low. So I had them replaced. However the "Brake Wear" message still appears.

My question is...does anyone know how to reset the computer so the "Brake Wear" message no longer appears?
There is no reset for this. It resets itself once the new pads and pad wear sensor have been replaced. So did they replace the pad wear sensor?

ERIC.

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#3 (permalink) Old 12-10-2009, 12:54 AM
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Go back through the threads tceepa this item has been covered fairly well regarding the replacement of the wear sensor .
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#4 (permalink) Old 12-10-2009, 07:23 AM
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It's possible that the above "sticky" "Problems and Solutions" "brakes" section will discuss the wear sensors.

Derek
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#5 (permalink) Old 12-10-2009, 08:39 AM
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Your help is greatly appreciated.

I don't think the pad wear sensor was replaced. Is this an expensive part or difficult to replace?

I ask because the car is a lease and it's going back in about 3 to 4 months. I don't want to spend more money on the car than necessary.

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There is no reset for this. It resets itself once the new pads and pad wear sensor have been replaced. So did they replace the pad wear sensor?
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#6 (permalink) Old 12-10-2009, 01:14 PM
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Very cheap piece and easy to install. ...but you have to remove the caliper and pad to change it. I would be very surprised if it wasn't changed with the new pad.

It's only on one front wheel and no proper mechanic would re-install a used and worn sensor. I mean, that's why the warning light came on....Right!!

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#7 (permalink) Old 12-10-2009, 11:23 PM
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Very cheap piece and easy to install. ...but you have to remove the caliper and pad to change it. I would be very surprised if it wasn't changed with the new pad.

It's only on one front wheel and no proper mechanic would re-install a used and worn sensor. I mean, that's why the warning light came on....Right!!

Derek
Correct and here we never put the old sensors back unless the customer wants it that way. But I have known new ones to be badly fitted leading to this light problem.

ERIC.

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#8 (permalink) Old 12-10-2009, 11:56 PM
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That's what I was thinking, if the pads are changed before the light goes on, why not re-use the sensor? Do you know how many mm it is deep into the remaining pad material? 2 mm? Did I mention I'm cheap?

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#9 (permalink) Old 12-11-2009, 12:06 AM
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That's what I was thinking, if the pads are changed before the light goes on, why not re-use the sensor? Do you know how many mm it is deep into the remaining pad material? 2 mm? Did I mention I'm cheap?
LOL, Yes some customers will refuse to pay for new sensors, especially when the light was not on to start with. But they do not understand the amount of heat that the sensor wires must absorb during the braking process and over the lifetime of the pads, the sensor wires become brittle.

Then we have to pull them out and put em back, = disaster and light on.

ERIC.

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- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
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#10 (permalink) Old 12-11-2009, 01:27 AM
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We have a saying "Why spoil the ship for a hapence worth of tar" I would have thought it good sense to always change them on brake renewal. Bit like re-using lock washers can be done but is it worth the risk for the small cost saved.
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