Replace For Part Number: A0009054104 0009054104 A0009057205 Operating Frequency: 433MHz Package Content: 1 / 4 Application: For 2019-2020 Mercedes-Benz A Class For 2019 Mercedes-Benz B Class For 2020 Mercedes-Benz CLA For 2020 Mercedes-Benz GLB For 2020 Mercedes-Benz GLS Note: 1.If you can not make sure which item fit for your car,please send the VIN CODE to us confirm it before order. 2. No programming Required: The Vehicle Sensors Tire Pressure is 100% new and come pre-programmed specifically for your make/model/year of vehicle,need activate them by scal tool or re-learning Simplified Relearn : OBDIIrequired *Installation ofis recommended to be performed only by trained professionals. 3.Installation Process . Loosen the tire: Remove the valve cap and core and deflate the tire. . Dismount the tire: Clamp the tire onto the tire changer, and adjust the valve at 1 oclock relative to the tire separation head. Insert the tire tool and lift the tire bead onto the mounting head to discount the head. . Dismount the : With a screwdriver remove the fastening screw and from the Valve stem, then loosen the nut and remove the valve. . Mount and valve: Slide the valve stem through the valve hole of the rim. Tighten the screw-nut with 4.0 Nm with the help of the positioning pin. Assemble the body against the rim and tighten the screw. . Mount the tire: Place the tire on the rim, making sure that the valve faces the separation head at an angle of 180 degrees. Mount the tire over the rim. FAQ Q:How long does the battery last? A: About 3 years. Q: Did they need to make program? A:The Vehicle Sensors Tire Pressure come pre-programmed specifically for your make/model/year of vehicle,need activate them by scal tool or re-learning Q: How toRelearn Procedure? A: OBD Relearn. Picture Details: