Mercedes Blind Spot Assist SENSOR w212 E350 S550 C300 C250 ML GL E 0009053303. WILL FIT EITHER SIDE . NOTE: this blind spot sensor fits few different types of Mercedes, such as W212 Mercedes E class , w204 , w166 Mercedes and many more . PLEASE MATCH PART NUMBER BEFORE BUYING . IN GOOD WORKING CONDITION AND COVERED BY 30 DAYS WARRANTY .