OE 2123203138 Front Air Spring Repair Kit with Multi-layer Reinforced Natural Rubber for Cost-Effective Maintenance 2123203138 Front Air Spring Repair Kit For Mercedes-Benz E-Class W212 / CLS W218 Our air spring repair kit OE 2123203138 is an economical aftermarket repair solution for the front air suspension of Mercedes-Benz E-Class W212 and CLS W218. Instead of replacing the entire expensive air strut assembly, this repair kit directly replaces the failed air bellow,