This is an original Mercedes-Benz vapor canister purge valve unit, suitable for use with various models including R129 SL500, S500, and CL600. It has an OEM valve type and features easy replacement. The part number is A0004701593 , A1404700093 , A0004703593 , or A0004702093 , and it has been manufactured in Germany. This valve unit has two vacuum ports and one mount hole, and it is suitable for front placement on the vehicle. It is a genuine OE OEM original part superseded by Mercedes-Benz.