General description This Valve Block Air Suspension Air Supply is designed for various Mercedes-Benz models, ensuring optimal performance for vehicles equipped with 4-Corner Air Suspension. It is a high-quality aftermarket replacement that matches the original specifications, providing reliable air distribution between the Air Suspension Compressor and the Air Struts or Air Spring Bags. Technical specifications OEM Numbers: 2123200158, 212 320 01 58, A2123200158, A212 320 01 58, 2123200358, 212 320 03 58, A2123200358, A212 320 03 58, 2123200658, 212 320 06 58, A2123200658, A 212 320 06 58 Condition: 100% Brand New Quantity: 1 unit Warranty: 2 years Compatibility and accessories Mercedes-Benz GL-Class X164 (2006-2012): GL 320 CDi, GL 350 CDi, GL 350 CDi BlueTEC, GL 420 CDi, GL 450, GL 450 CDi, GL 500 Mercedes-Benz R-Class W251 (2006-2013): R 280, R 280 4matic, R 280 CDi, R 280 CDi 4matic, R 300, R 300 CDi, R 300 CDi 4matic, R 320 CDi 4matic, R 350, R 350 4matic, R 350 CDi 4matic, R 350