Quote:
Originally Posted by qualified-merc
friend has a 1990 merc with ASR (also known as Acceleration Skid Control). He wants to know if the car requires special brake calipers?
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The definitive answer to the question will be found by inspection.
Remove a rear wheel and examine the caliper for the presence (or absence) of wear sensors in the brake pads. If there are sensors, then the caliper will have a mounting lug for the sensor socket.
It is possible that in her wisdom Mother Benz specified rear wear sensors in some models, and not in others. The OP has told us the year - 1990 - but not the model, so inspection is in order.