tryingstar,
The sensors at the strut bushing area can look good, but still need cleaning. Did you take them out to clean them?
The sensor measures the (not) rotating axles at the center of the axle (this should be written differently, but my lack of technical english is ruling here). If there is a lot of iron-related dirt in there, the sensor will not measure anything anymore and the light will be illuminated.

Did you only look, or did you clean the sensors as well?
greetingz,

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1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)