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Old 11-18-2003, 12:03 PM
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Join Date: Jul 2002
Posts: 197
Does a 90 420sel have rear brake sensors

I just had new brakes and rotors put all the way around my 90 420sel. I thought my car had rear sensors that would light up a light on the dash when the pads needed to be replaced. The mechanic stated that my car did not have sensors on the back brakes. Could this be true? I thought all 420sel's had the sensors. Is it just an option? I am thinking my wife has sensors on her 89 300se on front and back. Can anyone help me get this straight?
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Old 11-19-2003, 12:17 AM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
The W126 sedans have pad sensors in front and ABS sensors front and rear.

95 S420
91 300SE
87 300SDL
83 300SD
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Old 11-19-2003, 08:15 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
MB didn't put REAR brake wear sensors until 1991 (USA). And then only with optional traction systems!!

SO your 1990 car shouldn't have rear wear sensors.
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