SK-3218 is an Arnott designed new rear shock for the right or left side of Mercedes-Benz® R-Class 4MATIC® and RWD SUV's without AIRMATIC. This shock is assembled with a new custom valved shock which was thoroughly road tested to provide an excellent ride that adapts to the driver's style. This twin tube shock includes a new polyurethane bump stop, top and bottom mounts and protective dust boot. The new R-Class rear shock is assembled in the USA and is backed by a Limited Lifetime Warranty and 30-Day Satisfaction Guarantee.