General description 4 Pcs Parking Sensor Parktronic A2125420118 is designed for various Mercedes-Benz models, enhancing parking safety by detecting obstacles. This sensor set includes four sensors made of durable plastic, ensuring longevity and reliable performance. Technical specifications Sensor number: A2125420118, 2125420118, 0263003617 Color: Black Material: Plastic Measurement allowed error: +/- 1-3 cm Compatibility and accessories W169 ONE 150 (2004-2012) W169 ONE 160 CDi (2004-2012) W169 ONE 170 (2004-2012) W169 ONE 180 CDi (2004-2012) W169 ONE 200 (2004-2012) W245 B 150 (2005-2011) W245 B 170 (2005-2011) W212 E 250 (2009-2014) W221 S 320 CDi (2005-2009) W221 S 500 (2005-2014) W221 S 600 (2005-2014) Installation Installation instructions are not provided, but it is recommended to consult a professional for proper installation to ensure optimal functionality. Usage This parking sensor set is used to assist drivers in parking by detecting obstacles and providing alerts,