SL550 S550 CL550 CLS550 E320. TPMS Tire Pressure Sensor. 315 Mhz 0045429718 OEM. PLEASE MAKE SURE TO MATCH THE PART NUMBER WITH YOUR ORIGINAL PART. WHAT YOU SEE IN THE PHOTOS IS WHAT YOU WILL RECEIVE. All electronics are tested before removed from vehicle. If not functional, we will NOT sell. Please ask questions before purchasing. All the parts are tested either before or after removal from the vehicle. Before purchasing the item, the customer MUST verify that the item will fit the said vehicle. Item may show light scuffs, scratches or other imperfections as a result of this being a used part. Once you have received your item in satisfactory condition, please leave us feedback.