That system is "self-adjusting".
However if the car is driven with the parking brakes on the shoes under the rear rotors may need replacement or adjustment after inspection for wear!

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MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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