2010 S550 Park brake

I have a warning light for Park brake inoperable what does this mean???

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MBFanatic made a comment.
1 year 4 months ago

Have you tried to set the car in park and drive to see if  the brakes hold? 

 

 
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jvboone1959 made a comment.
1 year 4 months ago

Yes I did and they did not hold

 

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