Features: Reference OE part number: 2115403017, 2115402917. Vehicle fitment: the wheel speed sensors are compatible for Mercedes-Benz CLK350 CLS500 CLS55 CLS550 CLS63 E320 E350 E500 E55 E550 E63. Function: this ABS sensor is able to measure the rotational speed of the wheels and pass them fast to the cars engine control module. Effectively reduce braking distance, maintain steering control ability and improve steering stability to achieve reducing tire wearing effects. Premium material: the wheel speed sensor is made of quality ABS plastic and rubber material, high strength, sturdy for a long term to use. Installation: easy to install, but professional installation is highly recommended. Specification: Product name:.