Harsh Ride From Rear Due to Failed Dampening Actuator on Mercedes-Benz S420

Vehicles with automatic level control that ride harshly in the rear (no give in the suspension) may have one or both dampening actuators which have failed. It is commonly recommended the actuators be replaced in pairs.

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Average mileage: 192,763 (192,763–192,763)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
7 people reported this problem
1 person shared problem details
very hard ride and thump sound still have not fixed
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