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Help with Brake Pad Sensor Lamp
My brake pad sensor lamp (orange) on my E420 goes on when I put the gear in Park "P". It started to do that today. Am i due for brake pad changes? Why will it light up when i am in "P"? I will see if it still does that tomorrow. istn't supposed to light up when i am driving not when i am in "P"? Thanks.
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Joe95E420 |
#2
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If you have your foot on the brake pedal then the light will come on if your pads are low. According to my mechanic the vehicle can still be driven. I got new pads and sensors from the parts shop on this site and will have them installed next week. My mechanic said I could wait awhile but I'd rather have brakes that are 100 percent.
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#3
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When the light first starts to flicker there is a good amount of pad left. You have about 1000km before the pads start eating the rotors. You should be OK for a short time. Change the pads, or have them changed soon.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#4
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Lights up in park...
That means the parking lever is wearing out.
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#5
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Re: Lights up in park...
Quote:
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Joe95E420 Last edited by Joseph_H; 01-09-2004 at 12:26 AM. |
#6
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The parking lever (or emergency brake) activates the rear pads anyway, and I don't believe there are any rear sensors on that model.
Putting it in "P" locks the transmission pawl, and the sensors probably get activated with the slight motion you get when the key rotates until it reaches the pawl. The sensor just started to come on my ML this week, and so far it only comes on when I pull someplace and "park"...kinda like Joseph_H's situation. Driving styles dictate pad wear, but on the average, I find I have about 1500-2000 miles of pad life left before the "rivets hit the rotor"...that's a little over a month of daily driving for me...
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2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car |
#7
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I think I found out what's wrong!
I found out that the sensor wire was rubbing against the inner wheel somehow and the wire's insulation was gone showing bare wire and causing the sensor lamp to come on. I pushed the wire back enough to brake the contact and the lamp doesn’t light anymore. Looking at the pad, it got about 4mm thickness. I believe the minimum is 2mm. anyway, I’ll be due for brake job soon here and the sensors will be replaced. G-Benz is correct my car doesn't have sensors in the rear. in any case, this show that the sensor system works! simple, but works!
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Joe95E420 |
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