Mercedes Parktronic Systems Inside Tech 13/07/2015 Auto Mercedes ML W164 Parktronic Pinout Mercedes ML W164 comes equipped with 4-pin parktronic sensors, but there is also a version manufactured through 2007, until 2008, which uses 3-pin sensors. The part codes for the rectangular 4-pin sensors are: A0015427418 A0045428718 (upgraded version of A0015427418) Both are good up to chassis A448514 for cars equipped with SA CODE 220 (PARKTRONIC SYSTEM), Except model year 809 (2009). Code 11. The part code for the circular 3-pin sensor is: A2215420417 This one is show as From chassis A32101, From 28/09/2007, Except model year 808 (2008). Code 14. Ever wondered what use is the 4th pin ? The wiring diagrams shows us: it’s unused! Pinout: Signal wireFront sensors wire colors: YELLOW, YELLOW/WHITE, YELLOW/BLUE,BLACK, BLACK/BLUE, BLUE GroundWire color: BROWNSingle point for all front sensors UNUSED Voltage SupplyWire color: ORANGESingle point for all front sensors A0015427418 Inside teardown photos