Left.w/o sport suspension. Rear Left. Shock. A Shock absorber is a device that controls the spring oscillations when the vehicle goes over various road irregularities, so the vehicle's tires remain in contact with the road. In some cases, Shock absorbers have a secondary function as a suspension limiter to prevent the suspension from either over-extending and/or over-compressing. Air Suspension Spring. Exc.Sport Suspension. From Chassis/VIN 4E-4-005 901. To Chassis/VIN 4E-4-005 900. Air Suspension Spring. Damper. Strut Assembly. Suspension Absorber.