Question about 2004 Mercedes-Benz Mercedes Benz E Class

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Brake warning! a brake malfunction sign keeps coming on on the instrument panel display panel,even after chainging the pads and sensor connectors it's still the same xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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  • jupitermars Jun 16, 2008

    thank you so much,didn't work on the car I had the problem with but on another,many many thanks!!!!!!!!!!!!!!!!!!! I'll surely be a regular!

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You might have a leak in one or more of the brake lines. Or it might be as simple as low fluid in the master cylinder. Good Luck And PEACE

Posted on Jun 13, 2008

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2014 Ghibli. If I replace brake pads and discs does brake warning light turn off by itself or need to be reset?


If you're talking about brake pads that have an electrical connector..
the warning light comes on when the pad is so worn that it allows the electrical connector to earth via the disk .. hence the warning light.

Fitting new pads will not cause a warning light on your dashboard. No reset required.

Dec 22, 2015 | Maserati Cars & Trucks

1 Answer

Brake pad wear indicator light does not go off at the dash after changing rotors brake pads and the sensor in the front wheels all pads and rotors and the sensor is ok at rear. the vehicle has only 30000...


Did you change the sensor? if you did, do a battery reset (disconnect for 10 to 20 min.).

Obviously the wear sensor has made contact with the rotor and is already damaged. You're not even suppose to resuse the wear pad sensor if its worn or damaged anyways.The way how the sensor works is that it must make contact to the rotor to complete the wear pad light indicator circuit. There is no mentioning that he replaced the the wear pad sensor with a new one.

But if one did replaced the wear pad sensor and the wear pad indicator is lit up, the way to reset it is to leave the key on in ignition switch #2 or #1 for about 30sec. turn it off and its reset.

Its possible that you forgot to replace the brake light sensors. They are about 15 bucks, and have to be replaced in order for that light to turn off. You can either get them from the dealer where they'll likely charge you 3 times as much, or you can go to http://www.turnermotorsport.com and get them there.

You have to reset the light by leaving the ignition switch on position #2 for about 30 sec. turn off the ignition and start the engine up and see if it goes out. I recommend buying a new wear pad sensor as well because now light will lit up when you're way below spec (less than 3mm)

Also, you could try with this procedure for one E39: Turning off the Check Brake Linings warning on the Instrument Cluster...
- so you've just changed the brake pads on your E39, along with the wear sensors. The old sensor(s) needed replacement cause you waited a bit too long before changing the pads, and wore through the sensor(s), turning on the BRAKE light on the dash. But wait, the light is still on? But there's a new sensor installed... what gives?!
- there is a procedure required in order to turn off the light/warning. With the ignition off, step on and hold the brake pedal. Now, while holding the brake pedal down, turn on the ignition switch to position 2 (just before cranking). Hold the brake pedal until the BRAKE light is off. Tada, the warning is gone and reset.

NOTE: This procedure worked on a 2001 E46 325i. It took about 15-20 seconds, but it cleared out w/o having to unhook the battery.

Other details find in the Owners Manual 2006-BMW-Z4m-Roadster-Owner-Manual

Keep us updated.

Nov 04, 2010 | 2006 BMW Z4 Roadster

1 Answer

1993 S500-yellow light started flashing on the instrument panel. Round circle with 3 dots on both sides, between the ABS and Brake on the instrument panel


that light is your warning light for the brake pads. One of the brake pad sensors is starting to touch the rotor causing the light to come on or flash. Have the brakes checked. You will probably be needing to replace the brakes and the sensors.

Oct 08, 2010 | 1993 Mercedes-Benz S-Class

1 Answer

The brake light indicator light is on even after changing bulbs. What else will cause the warning light please?


Check your brake fluid, there is a level sensor in the brake fluid reservoir, if the fluid is low it's usually a sign that you should check your brake pads/shoes for wear, if the pads and shoes are ok, then top off the brake fluid and keep an eye on it for leaks (just make sure it doesn't get low again quickly).

Jul 09, 2010 | Cars & Trucks

1 Answer

Brake light on the instrumentation panel on my Toyota Sienna 2004 is "on". The "foot brake" is not engaged. What should I do?


If your brake system seems to be operating ok, then more than likely the system is low on fluid. As brake pads wear, this allows greater travel in the caliper and thus the caliper piston has to travel further to make the pads come into contact with the brake rotor, causing the fluid level to drop in the reservoir. Once the fluid level drops so far, the brake warning lamp will illuminate. When you check the fluid level, also inspect under the vehicle and around the brake lines for and sign of brake fluid leakage that could be causing you to lose fluid as well.

Jun 18, 2010 | 2004 Toyota Sienna

1 Answer

I have a Mercedes car 240 c. The brake wear warning came up on the instrument cluster. I have got changed the brake pads which were worn out. How can I reset the warning signal still appearing on the...


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The pad wear warning shouldn't have to be reset. It will only illuminate if it actively sees the sensor circuit grounding out. If the all the pads/sensors have been replaced properly, it should automatically disappear.

Maybe it's possible there's another problem. Fluid level is ok? No air in the system? All the sensor wires are routed properly? user_offline.gif quote.gif

Feb 19, 2010 | 2002 Mercedes-Benz C-Class

1 Answer

Disk brake warning light stays on even though the disk brakes have been changed, any ideas on how to get the light to go out?


There is a brake pad sensor that should be replaced whenever you replace the brake pads. It’s located inside a whole in the brake caliper of the left front wheel. When this sensor fails, the warning light will come up in your dashboard.

Hope this helps :)

Oct 25, 2009 | 2002 BMW 5 Series

1 Answer

Problem with my cruise control and ABS light on 03 Explorer


Anti-Lock Control —Vehicles Built After 03/2002 The 3-channel anti-lock brake system consists of the following components:
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • Anti-lock brake control module (ECU)
  • rear wheel speed sensor
  • rear wheel speed sensor rings
  • yellow anti-lock brake warning indicator
The 4-channel anti-lock brake system with traction control and stability assist system consists of the following components:
  • active brake booster with integral solenoid
  • brake booster release switch
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • stability assist module (ECU)
  • stability assist event indicator
  • lateral accelerometer
  • longitudinal accelerometer (4x4)
  • rear wheel speed sensors
  • rear wheel speed sensor rings
  • steering wheel position sensor
  • yaw rate sensor
  • yellow anti-lock brake warning indicator
  • brake pressure transducer
  • traction control switch
---------------------------------------------------------------------
I suspect the abs issue is causing the speed control not to work if it happened at the same time the cruise control stopped working. When the yellow ABS light comes on, it means the ABS is dactivated. You may have a faulty accelerometer which senses acceleration and yaw (side to side lean). I have not seen a bad one but you said it is sensitive to acceleration.
I would unplug it and see what happens. The connector should have a small tab to depress so you can pull the connector out.
Here is where it is:

Accelerometer Removal and Installation
  1. NOTE: The accelerometer is located under the center, rear passenger seat carpet. (I think you have to remove seat for access).
    Cut the carpeting along the perforations.
  1. Disconnect the electrical connector.
  1. Remove the nuts and remove the accelerometer.
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Have dealer hook up tester and pull fault codes if you can't find an easy solution.
Some background info
  • A malfunction in the anti-lock brake system will cause the anti-lock brake control module to shut off or inhibit the system. However, normal power-assisted braking remains.
  • Malfunctions are indicated by the yellow ABS warning indicator in the instrument cluster.
  • The anti-lock brake system is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will carry out a preliminary self-check on the anti-lock electrical system indicated by a three-second illumination of the yellow ABS warning indicator in the instrument cluster.
  • During vehicle operation, including normal and anti-lock braking, the anti-lock brake control module monitors all electrical anti-lock functions and some hydraulic operations.
  • Each time the vehicle is driven, as soon as vehicle speed reaches approximately 20 km/h (12mph), the anti-lock brake control module turns on the pump motor for approximately one-half second. At this time, a mechanical noise may be heard. This is a normal function of the self-check by the anti-lock brake control module.
  • Pedal pulsation coupled with noise while braking on loose gravel, bumps, wet or snowy roads is normal and indicates correct functioning of the anti-lock brake system.
  • Warning Lamp Indicator
    The anti-lock brake system (ABS) uses the yellow ABS warning indicator to alert the driver of a malfunctions in the ABS.
    The yellow ABS warning indicator will come on to warn the driver that the ABS has been turned off due to a symptom that exists in the ABS. Normal power assist braking remains but wheels can lock during a panic stop while the yellow ABS warning indicator is illuminated.

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    Please report back, I am curious if that is what it is. Good luck

    Mar 03, 2009 | 2003 Ford Explorer

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    disconnect your neg. cable for about 30 seconds

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    2001 Audi TT ''brake pad worn'' warning lamp


    the brake pad warning lite will come on when one of the sensors at the wheels grounds out against rotor indicating pads are close to replacement.

    Nov 16, 2008 | 2001 Audi TT

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