Turning off brake pad warning on 2001 S320?

[mlc]

The brake pad warning message has come on today on my 2001 S320. I am happy to replace the pads this weekend, however will the warning message be turned off with the new parts or does the message have to be cleared by a professional?

Sorry if this is a stupid question

Mark.

 

[television]

The brake pad warning message has come on today on my 2001 S320. I am happy to replace the pads this weekend, however will the warning message be turned off with the new parts or does the message have to be cleared by a professional?

Sorry if this is a stupid question

Mark.

Hi Mark,there is nothing to turn this warning off and it should go once the new pads are in. Your pads are held with the 2 pins that need to be knocked out, a simple job. Do use the new Mintex Cera tec grease (copper free)

 

[eric242340]

When you change your brake pads, change the brake pad wear sensors at the same time. The sensor wiring is affected by heat and the sensor is already in contact with the disc, causing damage to the sensor. Many times I see people have changed the brake pads and the light stays on. Sensor problem. Once changed the light should go out.

 

[eric242340]

As an after thought, maybe you havent changed pads on this car before, so ensure the pins go all the way in. There are interference fit rings on the rear of the pins and they should go all the way in, but its quite a simple job, dont worry.

 

[television]

When you change your brake pads, change the brake pad wear sensors at the same time. The sensor wiring is affected by heat and the sensor is already in contact with the disc, causing damage to the sensor. Many times I see people have changed the brake pads and the light stays on. Sensor problem. Once changed the light should go out.

What on earth are you talking about eric, change the sensor ? what sensor.

You have the wire that plugs into the pad that connects to to the socket on the car.

You say that the sensor is already in contact with the disc causing damage to the sensor.

What utter crap you talk, when will it all stop, it is near impossible to deform the wire to a point where it would make contact with the disc, owing to the placing of both sockets.

Please stop posting this kind of rubbish.

You wonder why I get angry at you, your last gearbox answer was 100% wrong

 

[television]

As an after thought, maybe you havent changed pads on this car before, so ensure the pins go all the way in. There are interference fit rings on the rear of the pins and they should go all the way in, but its quite a simple job, dont worry.

The pins are fitted with sprung rollers and it is the rollers that held them in.

 

[television]

It is very unfair that this so called professional man is allowed to go on posting.

It makes it hard work cleaning up behind him.

 

[television]

When you change your brake pads, change the brake pad wear sensors at the same time. The sensor wiring is affected by heat and the sensor is already in contact with the disc, causing damage to the sensor. Many times I see people have changed the brake pads and the light stays on. Sensor problem. Once changed the light should go out.

What on earth are you talking about eric, change the sensor ? what sensor.

You have the wire that plugs into the pad that connects to to the socket on the car.

You say that the sensor is already in contact with the disc causing damage to the sensor.

What utter crap you talk, when will it all stop, it is near impossible to deform the wire to a point where it would make contact with the disc, owing to the placing of both sockets.

Please stop posting this kind of rubbish.

You wonder why I get angry at you, your last gearbox answer was 100% wrong

 

[BRP]

It is very unfair that this so called professional man is allowed to go on posting.

It makes it hard work cleaning up behind him.

Malcolm
Just saw this thread and must share your concern as brakes are so vital and correct advice is essential to the less knowledgeable person such as myself

 

[television]

http://forums.mercedesclub.org.uk/showthread.php?t=26625


ERIC you must be Pis--d when you write this rubbish.

 

[Marc Open]

Sensors

OK Guys, I don't want to be involved in a "flaming match" but the sensors on my E320CDI (12/2001) were £1.47 each, they have a pin at one end which plugs into the socket on the brake mechanism, a plastic strip with a pin locator goes into the side of the pad, it's obvious as you can copy the positioning of the old one, one of my sensors was slightly worn and the sensor part of the arrangement seemed to have wires embedded within the plastic that was subject to wear when the surface of the pad is reduced to a critical level and the sensor/plastic bit rubs against the disc, I would think that the breaking of the circuit is what brings up the light but would only presume this. Again I only presume and take care to stress this, once you have closed the circuit with the new sensor at £1.47 the light would go off. I would stress this job is really easy, you don't have to be a formula one mechanic to be able to do it, just read through the posts on the subject and take your time........Marc

 

[television]

Sorry Mark you are backwards on this, there is no complete circuit until the pads have worn down to the pin on the end of the wire, then the circuit is made when the pin touches the disc, this turns on the lamp in the dash.

This is a simple battery and bulb circuit, the pin and disc being the switch.


Malcolm

 

[Marc Open]

OK thanks for that Malcom....ummmm, I meant to say that once you have closed the circuit by installing a new censor...... blah blah blah.....:-}

 

[mlc]

Just a quick update now the job is done.

Bought new front disks plus new pads front and rear from Eurocarparts online. A vrey striaghtforward job, took about 2 hours in total last night.

Only one problem, no new sensors included, which was disappointing to say the least. A quick visit to MB this lunchtime to collect new sensors which are easy to fit with the pads fitted.

Thanks for the advice, as expected the warning message went off once the sensors were in place.

Mark.

 

[SJAD]

Sensor

Welcome

You do not require the braking sensor to be re programmed. I have recently renewed my front disk pads on my Mercedes and I made the mistake of leaving the orginal sensors in situ (Warning light would not extingish) I noted that I required two new sensors for the pads and attended at my local Mercedes dealer. However they only had one sensor in stock (£3:95) so I fitted this to the front drivers side pad and the warning light extingished. Dealer stated that I required TWO sensors, but I only replaced the one and it works fine..........and no warning light!!

Glad to help

 

[television]

thank you for the update.

 

[eric242340]

OK Guys, I don't want to be involved in a "flaming match" but the sensors on my E320CDI (12/2001) were £1.47 each, they have a pin at one end which plugs into the socket on the brake mechanism, a plastic strip with a pin locator goes into the side of the pad, it's obvious as you can copy the positioning of the old one, one of my sensors was slightly worn and the sensor part of the arrangement seemed to have wires embedded within the plastic that was subject to wear when the surface of the pad is reduced to a critical level and the sensor/plastic bit rubs against the disc, I would think that the breaking of the circuit is what brings up the light but would only presume this. Again I only presume and take care to stress this, once you have closed the circuit with the new sensor at £1.47 the light would go off. I would stress this job is really easy, you don't have to be a formula one mechanic to be able to do it, just read through the posts on the subject and take your time........Marc

Hi Marc, you are correct and Malcolm just replied to your post and he too is correct. But what malcolm did not explain is that if the sensor wire is broken or not connected then the computer will recognise this as a missing sensor and also put the warning lamp on.

 

[eric242340]

Just a quick update now the job is done.

Bought new front disks plus new pads front and rear from Eurocarparts online. A vrey striaghtforward job, took about 2 hours in total last night.

Only one problem, no new sensors included, which was disappointing to say the least. A quick visit to MB this lunchtime to collect new sensors which are easy to fit with the pads fitted.

Thanks for the advice, as expected the warning message went off once the sensors were in place.

Mark.

Glad to hear. New pads and new sensors is the only safe way to go.

 

[hmang]

fellas
my calipers only have one sensor contact

i assumed that the brake warning light system was open circuit until the disc wore the pad away enough to touch the sensor probe thus providing an earth and completing the circuit

did i get it wrong?

 

[television]

Hi Marc, you are correct and Malcolm just replied to your post and he too is correct. But what malcolm did not explain is that if the sensor wire is broken or not connected then the computer will recognise this as a missing sensor and also put the warning lamp on.

Eric more crap, how the hell can you fix cars when you do not know how they work.

These things are the most basic school circuit that you can have and please do not involve my name in your stupid answers. There is no connection to any computer.

In the photo in have enclosed you have a sensor wire, the end that goes into the brake pad on this one is all plastic with a wire embedded in that proves the point, some are brass but it is the same thing. There is no circuit, brake pads are not conductive in any way, so if you leave the sensor wires out the warning lamp will never come on,it cant.
When the brake pad wears down to the limit,the sensor pin touches the brake disc and this puts the light on as the circuit is now complete, in the case of the sensor wire in the photo it has to wear through the plastic on the pin that goes into the pad. You can see on the pad photo that the sensor pin touches the disc when the pad has about 2½ mm left on it.


When I complained to Blobcat about these post from a so called MB training center and that is Eric says he is, Blobcat reminded me of a wrong post I did some 11,475 post ago.

The time spent on putting these thing straight could have been spent helping someone with a problem. It could be seen by some that I am argumentative that is not the case,hardly anyone else challenges his wrong post. I just want to belong to a forum with good information and help, and be proud of that. If I am wrong thats fine as I will learn something new, and that cant be bad.