The sensor system is quite simple -- the sensor is a plastic coated
wire. When the pads wear down enough, the plastic rubs off on the
tip of the wire and the wire contacts the disk. On the other end of
the wire is a lamp and 12V, so when the wire contacts the disk, the
lamp comes on.
Yes, it's normal for there to be no lamp with no sensors.
Reminds me to check my mother's TE as I've not put brakes on the
front yet after 7 years or so -- she only drives a couple thousand
miles a year these days.
Peter
On Nov 8, 2008, at 8:13 AM, Curt Raymond wrote:
Spent some time staring at the brake sensor yesterday and couldn't
figure out how the heck the thing worked. Today looking at the DIY
on MercedesShop I realize its because the sensors are actually
missing. The plastic junction block whatsis is there but the sensor
wires are not. They $1.50 from Rusty so I figure I'll pick 'em up.
Interestingly the light is not on right now, is that normal?
-Curt
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